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CompTIA A+ Core 1 220-1201 (220-1201) — Questions 76–150

871 questions total · 12pages · All types, answers revealed

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76
MCQmedium

A technician is setting up a new file server and needs to assign it a static IP address. The network uses a subnet of 192.168.1.0/24, and the router's LAN IP is 192.168.1.1. The technician wants to ensure the server is reachable from all devices on the local network. Which of the following IP addresses should the technician assign to the server?

A.192.168.1.0
B.192.168.1.255
C.192.168.1.50
D.192.168.2.1
AnswerC

The address 192.168.1.50 falls squarely within the usable host range of 192.168.1.1 through 192.168.1.254 for a standard /24 subnet. This makes it a perfectly valid IP address that can be assigned to a device. For a file server, assigning a static IP address like this is crucial for consistent accessibility and reliable service provision, ensuring clients can always locate it without relying on dynamic assignments.

Why this answer

(192.168.1.50) is correct because it falls within the usable host range of the 192.168.1.0/24 subnet (192.168.1.1 to 192.168.1.254) and is not reserved for the network address or broadcast address. Assigning this static IP ensures the server is reachable from all devices on the local network, as it is on the same subnet as the router's LAN IP (192.168.1.1).

Exam trap

The trap here is that candidates often confuse the network address (192.168.1.0) or broadcast address (192.168.1.255) as valid host IPs, or they pick an IP from a different subnet (192.168.2.1) thinking it will still work, failing to recognize that devices on different subnets require a router to communicate.

How to eliminate wrong answers

Option A is wrong because 192.168.1.0 is the network address (all host bits set to 0) and cannot be assigned to any host; it is reserved to identify the subnet itself. Option B is wrong because 192.168.1.255 is the broadcast address (all host bits set to 1) and is used to send packets to all hosts on the subnet, not assignable to a single device. Option D is wrong because 192.168.2.1 belongs to a different subnet (192.168.2.0/24) and would not be reachable from devices on the 192.168.1.0/24 network without routing, which is not configured in this scenario.

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77
MCQmedium

A technician is troubleshooting a laser printer that produces pages with a faint ghost image of the previous page. The ghost image is slightly offset. Which component is most likely the cause?

A.The toner cartridge is low on toner.
B.The fuser assembly is overheating.
C.The drum's cleaning blade is worn.
D.The pickup rollers are dirty.
AnswerC

The cleaning blade is a critical component responsible for removing any residual toner from the photosensitive drum after the image has been transferred to the paper. If this blade becomes worn, damaged, or loses its effectiveness, it will fail to completely scrape off all leftover toner particles. These unremoved toner particles will then be picked up during the subsequent print cycle, leading to a faint, repeating "ghost" image of the previous page appearing on the current printout.

Why this answer

Ghosting in laser printers is often caused by a worn or damaged cleaning blade on the drum, or a failing fuser that doesn't fully fuse toner. The offset ghost indicates residual toner from the previous page not being cleaned off the drum.

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78
MCQeasy

A user reports that their smartphone can connect to Wi-Fi at home but not at the office. Other devices connect fine to the office Wi-Fi. What is the most likely cause?

A.The smartphone's Wi-Fi antenna is damaged.
B.The office Wi-Fi router is out of range.
C.The smartphone has the wrong Wi-Fi password or security type saved.
D.The smartphone's IP address is static and conflicting.
AnswerC

An incorrect Wi-Fi password (pre-shared key) or a mismatch in the security protocol (e.g., the smartphone is configured for WPA2 while the access point expects WPA3, or vice-versa) will prevent the smartphone from successfully authenticating with the office network. This is a device-specific configuration error that would explain why other devices can connect while this particular smartphone cannot establish a connection.

Why this answer

The smartphone can connect at home but not at the office, while other devices connect fine to the office Wi-Fi. This points to a client-side configuration mismatch, most likely an incorrect password or security type (e.g., WPA2 vs. WPA3) saved on the phone.

A damaged antenna or out-of-range router would affect all connections, and a static IP conflict would typically cause intermittent issues, not a complete failure to associate.

Exam trap

The trap here is that candidates often assume a hardware fault (antenna) or IP conflict, but the key clue is that other devices work fine, isolating the issue to the client's saved credentials or security configuration.

How to eliminate wrong answers

Option A is wrong because a damaged Wi-Fi antenna would prevent connectivity at both home and office, not selectively at the office. Option B is wrong because the office Wi-Fi router being out of range would affect all devices, not just the user's smartphone. Option D is wrong because a static IP address conflict would cause a failure to obtain or maintain an IP lease (DHCP ACK/NACK), but the device would still associate and authenticate at Layer 2; the symptom here is inability to connect at all, which occurs before IP assignment.

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79
MCQmedium

A customer reports that their laptop frequently disconnects from the Wi-Fi in their home office, but works fine in other rooms. The office is located in a detached garage, and the wireless router is in the main house. Which wireless networking technology would best solve this issue without running cables?

A.5 GHz frequency band
B.Wireless mesh network
C.Powerline networking adapters
D.802.11ac standard
AnswerB

A wireless mesh network uses multiple access points that relay traffic between each other wirelessly, extending coverage into the detached garage without cabling. The nodes backhaul over Wi-Fi, so the laptop maintains a stable connection rather than dropping when the router's signal weakens across the distance.

Why this answer

A wireless mesh network is the best solution because it extends Wi-Fi coverage to the detached garage without running cables. Mesh nodes communicate wirelessly with each other, creating a seamless network that overcomes the range and obstruction issues caused by the distance and building materials between the main house and garage.

Exam trap

The CompTIA A+ exam often tests the misconception that upgrading to a newer standard (like 802.11ac) or switching to 5 GHz alone will fix range issues, when in fact these technologies are more susceptible to attenuation and require a strong signal to deliver their benefits.

How to eliminate wrong answers

Option A is wrong because the 5 GHz frequency band has shorter range and poorer penetration through walls and obstacles compared to 2.4 GHz, so it would actually worsen the connectivity issue in a detached garage. Option C is wrong because powerline networking adapters require the home and garage to share the same electrical circuit and phase, which is often not the case with detached structures, and they are not a wireless technology. Option D is wrong because 802.11ac is a wireless standard that operates primarily on the 5 GHz band and does not inherently solve range or obstruction problems; it requires a strong signal to function effectively.

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80
MCQmedium

A small office reports that internal users can access the internet but cannot resolve domain names to IP addresses. The DNS server is configured correctly. Which port should be checked on the firewall?

A.Port 80
B.Port 53
C.Port 443
D.Port 67
AnswerB

DNS queries and responses travel over port 53, so a firewall blocking that port prevents clients from resolving names even though the DNS server itself is correctly configured. Internet access over ports 80 and 443 still works, matching the reported symptoms.

Why this answer

Port 53 is the standard port for DNS traffic, used for both TCP and UDP. Since internal users can access the internet but cannot resolve domain names, the firewall is likely blocking outbound DNS queries on port 53, preventing the client from reaching the DNS server even though the server itself is configured correctly.

Exam trap

The CompTIA A+ exam often tests the misconception that DNS uses only TCP or that port 80/443 are involved in name resolution, leading candidates to overlook the specific UDP port 53 requirement for DNS queries.

How to eliminate wrong answers

Option A is wrong because port 80 is used for HTTP web traffic, not DNS resolution; blocking port 80 would prevent web browsing, not name resolution. Option C is wrong because port 443 is used for HTTPS secure web traffic, not DNS; blocking it would affect secure websites but not domain name resolution. Option D is wrong because port 67 is used by DHCP servers for client configuration (DHCPOFFER), not for DNS queries; blocking it would prevent IP address assignment, not name resolution.

Full explanation →
81
MCQhard

A technician is troubleshooting a Samsung Galaxy tablet that will not rotate the screen when the device is turned sideways. Auto-rotate is enabled in the settings, and the screen rotates correctly in safe mode. What is the most likely cause?

A.The accelerometer is faulty.
B.A third-party app is preventing rotation.
C.The auto-rotate setting is only enabled for certain apps.
D.The tablet's gyroscope needs calibration.
AnswerB

Many third-party applications, particularly those designed for specific media consumption or gaming, can programmatically lock the device's screen orientation to portrait or landscape, overriding the system's auto-rotate setting. When such an app is running in the background or has persistent permissions, it can interfere with the global rotation functionality. Booting the tablet into safe mode temporarily disables all non-essential third-party applications and services, allowing the core Android system to function without interference. The fact that screen rotation works correctly in safe mode strongly indicates that a user-installed application is the root cause of the issue.

Why this answer

Since auto-rotate is enabled in settings and rotation works correctly in safe mode, the hardware (accelerometer/gyroscope) is functioning properly. Safe mode disables all third-party apps, so the fact that rotation works there proves a third-party app is interfering with the rotation service. This is the classic diagnostic pattern for isolating software vs. hardware faults on Android devices.

Exam trap

220-1201 often tests the safe-mode diagnostic pattern — candidates who don't recognize that safe mode isolates third-party software from hardware will incorrectly blame the accelerometer or gyroscope.

How to eliminate wrong answers

Option A is wrong because a faulty accelerometer would fail in safe mode as well — safe mode only disables third-party apps, not hardware. Option C is wrong because Android's auto-rotate setting is a global system toggle, not a per-app setting (apps can request specific orientations, but the system setting itself is not app-scoped). Option D is wrong because a gyroscope calibration issue would also manifest in safe mode and would typically affect more than just rotation.

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82
MCQmedium

A small accounting firm wants to run a legacy Windows XP application that is incompatible with Windows 11. The technician needs to provide the least disruptive solution that allows the application to run on the existing Windows 11 desktop without modifying the host OS or purchasing new hardware. Which of the following should the technician implement?

A.Type 1 hypervisor
B.Type 2 hypervisor
C.Virtual desktop infrastructure (VDI)
D.Application virtualization
AnswerB

A Type 2 hypervisor runs as an application on top of the host OS, allowing a legacy OS like Windows XP to run in a VM without altering the Windows 11 host. This is the least disruptive because it requires no hardware changes or host OS modifications, and the VM can be isolated from the host.

Why this answer

A Type 2 hypervisor installs as software on the existing Windows 11 host, letting the technician create a Windows XP VM with minimal disruption. It avoids reimaging the host or buying new hardware, and the VM remains isolated. Type 1 hypervisors replace the host OS, VDI needs server infrastructure, and application virtualization cannot provide a full legacy OS.

Exam trap

The trap here is assuming that any hypervisor requires wiping the host OS or that application virtualization can substitute for a full guest OS.

Full explanation →
83
MCQeasy

A small office has a single router with four LAN ports. The network uses 192.168.1.0/24. A new printer is assigned a static IP of 192.168.1.256. What will happen when the printer is connected?

A.The printer will work but only with devices that have a static IP
B.The printer will automatically obtain a valid IP via DHCP
C.The printer will not be able to communicate on the network
D.The printer will cause an IP address conflict with the router
AnswerC

The printer will not be able to communicate on the network because 192.168.1.256 is an invalid IP address. In IPv4 addressing, each octet (the numbers separated by dots) must be within the range of 0 to 255, inclusive. The value '256' in the last octet falls outside this permissible range, making the entire address non-routable and unusable for network communication. Consequently, the printer's network interface cannot properly bind to this address, preventing any data transmission or reception.

Why this answer

192.168.1.256 is an invalid IPv4 address. In IPv4, each octet is an 8-bit number ranging from 0 to 255. The value 256 exceeds this limit, so the address is malformed.

The printer will not be able to communicate on the network because its configured IP is outside the valid address space and cannot be used for any network communication.

Exam trap

The trap here is that candidates may assume 192.168.1.256 is a valid IP address because it looks similar to common private addresses, but the A+ exam tests the fundamental rule that IPv4 octets must be in the range 0–255.

How to eliminate wrong answers

Option A is wrong because the printer cannot work at all with any device, static or dynamic, since its IP address is invalid and cannot be used for network communication. Option B is wrong because the printer is configured with a static IP address, not DHCP; even if it were set to DHCP, the invalid static assignment would prevent it from obtaining a valid address automatically. Option D is wrong because an IP address conflict requires two devices to have the same valid IP address; 192.168.1.256 is invalid, so no conflict can occur with the router or any other device.

Full explanation →
84
MCQhard

A user reports that their laptop's Wi-Fi connection drops every 10 minutes, but reconnects immediately. The technician notices that the laptop is connected to a 5 GHz SSID. What is the most likely cause?

A.The laptop's Wi-Fi driver is outdated.
B.The access point is configured with a short DHCP lease time.
C.The user is at the edge of the 5 GHz coverage area.
D.There is interference from a microwave oven.
AnswerC

5 GHz Wi-Fi signals have a significantly shorter range and are more susceptible to attenuation by walls and other obstacles compared to 2.4 GHz. Being at the edge of the 5 GHz coverage area means the signal strength (RSSI) is weak and prone to fluctuations, causing the laptop to periodically lose connection and re-associate as the signal briefly drops below a usable threshold.

Why this answer

The most likely cause of intermittent Wi-Fi drops that reconnect immediately on a 5 GHz SSID is that the user is at the edge of the 5 GHz coverage area. 5 GHz signals have shorter range and poorer wall penetration than 2.4 GHz, so the laptop may lose connection and then quickly reconnect when the signal briefly improves or when it roams. This matches the symptom of drops every 10 minutes.

Exam trap

220-1201 often tests the characteristics of 2.4 GHz vs 5 GHz; candidates may incorrectly blame microwave interference (2.4 GHz) or DHCP lease times instead of recognizing range limitations of 5 GHz.

How to eliminate wrong answers

Option A is wrong because an outdated driver would typically cause consistent issues, not periodic drops that reconnect immediately. Option B is wrong because a short DHCP lease time would cause IP address renewal issues, but the connection would not drop and reconnect at the Wi-Fi layer; it would be a Layer 3 issue. Option D is wrong because microwave ovens primarily interfere with 2.4 GHz, not 5 GHz, and interference would cause more random, not periodic, drops.

Full explanation →
85
MCQhard

A server with a RAID 6 array of six 2 TB drives experiences a double drive failure. After replacing both drives, the technician starts the rebuild process, but the array status shows 'Degraded' and the rebuild fails. What is the most likely cause?

A.The new drives are not the same capacity as the originals.
B.The RAID controller firmware is outdated.
C.A third drive has developed bad sectors.
D.The rebuild process was interrupted by a power outage.
AnswerC

A RAID 6 array can tolerate the failure of any two drives because it stores two independent parity blocks. However, during a rebuild operation, the RAID controller must read data from all remaining healthy drives to reconstruct the missing data onto the new replacement drives. If a third drive, beyond the initial two that failed, develops unreadable bad sectors, the controller cannot access the necessary data or parity information to complete the reconstruction process, leading to an unrecoverable rebuild failure. This scenario highlights the critical vulnerability during rebuilds.

Why this answer

RAID 6 can tolerate two drive failures, but if a third drive fails or has bad sectors during rebuild, the array may fail. The most likely cause is that a third drive developed bad sectors during the rebuild, preventing successful reconstruction. This highlights the risk of rebuild stress on older drives.

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86
MCQhard

A user reports that their laser printer prints pages with a repeating horizontal band of missing text about every 3 inches. The printer has a new toner cartridge and the drum is separate. What is the most likely cause?

A.The fuser is not reaching the correct temperature
B.The toner cartridge is defective
C.The drum unit has a scratch or defect
D.The paper is damp or of poor quality
AnswerC

A scratch or defect on the drum unit's photosensitive surface prevents it from holding an electrostatic charge or accepting toner correctly in that specific area. As the drum rotates during the printing process, this damaged spot will consistently fail to transfer toner to the paper, resulting in a repeating missing band on the printed output. The interval of the repeating defect directly corresponds to the circumference of the drum, making this a definitive diagnostic indicator.

Why this answer

A repeating horizontal defect at a fixed interval (here, every 3 inches) is the classic signature of a physical defect on a rotating component whose circumference matches that interval — most commonly the drum unit. Since the drum is separate from the toner cartridge and the toner is new, the scratch or debris on the drum surface is the most likely cause.

Exam trap

220-1201 often tests the misconception that any print defect points to the toner cartridge, when repeating defects at a fixed interval almost always indicate a drum or roller circumference issue.

How to eliminate wrong answers

Option A is wrong because a fuser temperature problem causes smearing, toner not fusing, or cold-offset artifacts — not a clean repeating band of missing text at a fixed interval. Option B is wrong because the toner cartridge is new and a defective toner cartridge typically causes streaking, light print, or leakage, not a precisely repeating 3-inch band. Option D is wrong because damp or poor-quality paper causes wrinkling, jamming, or inconsistent toner adhesion, not a periodic missing-text band.

Full explanation →
87
MCQmedium

A customer reports that their new NVMe SSD is not detected by the system, even though it is properly seated. The motherboard supports both UEFI and legacy BIOS. Which firmware setting should be enabled to ensure the NVMe drive is recognized?

A.Enable Legacy BIOS mode
B.Enable Secure Boot
C.Enable UEFI boot mode and disable CSM
D.Enable SATA hot-plug
AnswerC

Enabling UEFI boot mode and disabling the Compatibility Support Module (CSM) is the correct solution. UEFI (Unified Extensible Firmware Interface) natively supports NVMe drives through its integrated NVM Express driver and the GPT (GUID Partition Table) partitioning scheme. Disabling CSM ensures the system operates in pure UEFI mode, preventing it from attempting to emulate a legacy BIOS environment that would fail to recognize the NVMe SSD.

Why this answer

NVMe SSDs require UEFI boot mode to be recognized by the system, as they are not supported in legacy BIOS mode. Enabling UEFI boot mode and disabling Compatibility Support Module (CSM) ensures that the system uses native UEFI firmware, which includes NVMe drivers, allowing the drive to be detected.

Exam trap

220-1201 often tests firmware settings for storage, and candidates may think enabling Secure Boot or legacy mode helps, but the key is UEFI with CSM disabled.

How to eliminate wrong answers

Option A is wrong because legacy BIOS mode does not support NVMe drives natively; it lacks the necessary drivers. Option B is wrong because Secure Boot is a security feature that ensures only signed bootloaders run, but it does not affect NVMe detection. Option D is wrong because SATA hot-plug is for SATA drives, not NVMe, which uses PCIe.

Full explanation →
88
MCQmedium

A user has a laptop that supports USB-C Power Delivery and wants to charge it using a portable power bank while on a flight. The power bank has a USB-A output. Which additional accessory is required?

A.A USB-A to USB-C cable.
B.A USB-C to USB-C cable.
C.A power bank that supports USB-C Power Delivery output.
D.A USB-C to HDMI adapter.
AnswerC

For a laptop that supports USB-C Power Delivery (PD) to charge efficiently, the power source, such as a power bank, must also explicitly support USB-C PD *output*. This capability allows the power bank to negotiate and supply the higher voltages and currents (e.g., 20V at 3A or 5A) that modern laptops require for proper charging. The existing power bank, presumably lacking a USB-C PD output port, cannot meet these power demands, thus necessitating a new, PD-enabled power bank.

Why this answer

The laptop requires USB-C Power Delivery (PD) to negotiate a charging voltage higher than the standard 5V. A power bank with only a USB-A output cannot provide the PD protocol negotiation over USB-A, as PD is a feature of the USB-C connector and its configuration channel (CC) lines. Therefore, a power bank that explicitly supports USB-C PD output is necessary to deliver the higher wattage (e.g., 20V/3A) that the laptop expects for charging.

Exam trap

The 220-1201 exam often tests the misconception that any USB-C cable or adapter will enable charging, when in reality the power source must also support the USB-C PD protocol to deliver the higher voltages required by laptops.

How to eliminate wrong answers

Option A is wrong because a USB-A to USB-C cable, even if it physically connects, cannot carry USB Power Delivery signaling; USB-A lacks the CC line required for PD negotiation, so the laptop will only receive a standard 5V charge (if any), which is insufficient for charging during use. Option B is wrong because a USB-C to USB-C cable is the correct cable type, but the power bank still has only a USB-A output, so a USB-C to USB-C cable cannot be connected to the power bank at all. Option D is wrong because a USB-C to HDMI adapter is for video output, not for power delivery, and does not address the need to charge the laptop.

Full explanation →
89
MCQmedium

A technician is configuring a small office network and needs to connect a new VoIP phone that requires Power over Ethernet (PoE). The existing switch does not support PoE. Which of the following is the BEST solution to provide power to the phone without replacing the switch?

A.Connect the phone to a power outlet using its AC adapter.
B.Use a PoE injector between the switch and the phone.
C.Replace the existing switch with a PoE switch.
D.Install a PoE-enabled network interface card (NIC) in the phone.
AnswerB

A PoE injector adds power to the Ethernet cable, allowing a non-PoE switch to power a PoE device. It is placed between the switch and the phone, injecting both data and power. This is a cost-effective solution without replacing the switch. It meets the requirement of providing power to the VoIP phone.

Why this answer

A PoE injector is the best solution because it adds power to the Ethernet connection without requiring a new switch. It is a small device that combines data from the switch and power from an outlet, sending both to the PoE device. Using an AC adapter bypasses PoE and may not meet the requirement.

Adding a NIC is not applicable, and replacing the switch is unnecessary. Thus, the injector is the most efficient fix.

Exam trap

The trap here is overlooking the PoE injector and jumping to replace the switch or use a power adapter, which either costs more or does not fulfill the PoE requirement.

Full explanation →
90
MCQmedium

A technician is setting up a new Android tablet for a field sales representative. The tablet needs to connect to the internet via a cellular data plan. The technician inserts a nano-SIM card from the company's carrier, but the tablet shows 'No SIM card' in the status bar. The SIM card works in another tablet. What is the most likely cause?

A.The tablet's cellular radio is disabled in the settings.
B.The SIM card is not compatible with the tablet's LTE bands.
C.The SIM card is not fully inserted or is inserted incorrectly.
D.The tablet requires a software update to enable cellular functionality.
AnswerC

This is the most common cause of 'No SIM' on a new device. The SIM tray may not be pushed in all the way, or the SIM is upside down. Re-seating the SIM correctly is the first step.

Why this answer

The 'No SIM card' error with a SIM that works in another device almost always indicates a physical insertion problem — the nano-SIM is not seated correctly in the tray or is misaligned. Nano-SIMs are easy to insert upside down or at a slight angle, and the tray may not latch fully. Reseating the SIM correctly resolves the issue.

Exam trap

220-1201 often tests hardware vs. software troubleshooting — candidates jump to software causes (radio disabled, update needed) when the symptom 'No SIM card' points directly to a physical seating issue, especially when the SIM works in another device.

How to eliminate wrong answers

Option A is wrong because a disabled cellular radio would show 'No service' or 'Airplane mode,' not 'No SIM card' — the OS detects the SIM independently of radio state. Option B is wrong because band incompatibility would still allow the SIM to be detected; it would cause no data connection, not a missing SIM error. Option D is wrong because a software update is not required for basic SIM detection; the OS reads the SIM at a hardware level regardless of version.

Full explanation →
91
MCQmedium

A technician is configuring a conference room where a laptop must wirelessly display its screen to a 4K projector without using any cables. The projector supports Miracast. What must the technician verify on the laptop?

A.The laptop has Bluetooth enabled.
B.The laptop is connected to the same Wi-Fi network as the projector.
C.The laptop supports Miracast and Wi-Fi is enabled.
D.The laptop has an HDMI port.
AnswerC

For a laptop to successfully utilize Miracast for wireless screen mirroring, two fundamental conditions must be met. First, the laptop's hardware and operating system must natively support the Miracast standard, which typically involves a compatible wireless display adapter and drivers. Second, the laptop's Wi-Fi radio must be enabled and active, as Miracast exclusively leverages Wi-Fi Direct technology to create the necessary peer-to-peer connection for streaming audio and video.

Why this answer

Miracast uses Wi-Fi Direct to establish a peer-to-peer wireless link between devices, so the laptop must support Miracast and have Wi-Fi enabled. It does not require a shared Wi-Fi network or Bluetooth, as Miracast creates its own direct connection for screen mirroring.

Exam trap

CompTIA often tests the misconception that Miracast requires a shared Wi-Fi network (like a corporate SSID), when in fact it uses Wi-Fi Direct for a direct device-to-device connection.

How to eliminate wrong answers

Option A is wrong because Miracast does not use Bluetooth; it relies on Wi-Fi Direct for the wireless display connection. Option B is wrong because Miracast uses Wi-Fi Direct, which creates a direct link between devices without needing them to be on the same Wi-Fi network. Option D is wrong because the scenario explicitly states no cables are used, and Miracast is a wireless technology that bypasses the need for an HDMI port.

Full explanation →
92
MCQhard

A technician is troubleshooting a PC that will not boot after a power surge. The motherboard has a built-in diagnostic LED that shows a red light near the DRAM slot. The user had recently upgraded the RAM. What is the most likely cause?

A.The power surge damaged the motherboard's memory controller.
B.The new RAM module is not compatible with the motherboard.
C.The power surge corrupted the BIOS firmware.
D.The RAM is not seated in the correct slots for dual-channel mode.
AnswerB

The new RAM module is not compatible with the motherboard, which is a very common cause for a DRAM LED to illuminate after a memory upgrade. Motherboards and their integrated memory controllers have specific requirements for RAM type (e.g., DDR4 vs. DDR5), speed, voltage, and capacity. If the newly installed module does not meet these specifications, the motherboard's Power-On Self-Test (POST) will fail during memory initialization, triggering the DRAM diagnostic light.

Why this answer

A red LED near the DRAM slot indicates a memory-related issue. After a power surge, the RAM could be damaged, or the new RAM might have been improperly seated. However, since the user recently upgraded, the most likely cause is that the new RAM is not compatible or is faulty.

Full explanation →
93
MCQmedium

A company has offices in two different cities and needs to connect their local networks so employees can access centralized resources. They require a secure, high-speed connection over a long distance. Which network type should be used?

A.Local Area Network (LAN)
B.Metropolitan Area Network (MAN)
C.Wide Area Network (WAN)
D.Personal Area Network (PAN)
AnswerC

A WAN links geographically separate local networks, satisfying the long-distance, high-speed requirement between the two city offices. Unlike a LAN confined to one site, it uses leased lines or MPLS to carry traffic securely across the provider backbone, giving employees access to centralized resources.

Why this answer

A Wide Area Network (WAN) is the correct choice because it connects geographically separated networks over long distances, providing the secure, high-speed link required for centralized resource access between two cities. Technologies like MPLS, leased lines (e.g., T1/E1), or VPNs over fiber optic connections are commonly used to implement WANs for such inter-site connectivity.

Exam trap

A common mistake is selecting Metropolitan Area Network (MAN) because it seems to cover a large area, but MAN is limited to a single city or metropolitan region, not connecting two different cities over a long distance.

How to eliminate wrong answers

Option A is wrong because a Local Area Network (LAN) is confined to a single building or campus and cannot span the long distance between two cities. Option B is wrong because a Metropolitan Area Network (MAN) typically covers a single metropolitan area (e.g., a city or large campus), not the inter-city distance required here. Option D is wrong because a Personal Area Network (PAN) is limited to a very short range (e.g., Bluetooth, USB) around an individual, making it unsuitable for connecting remote offices.

Full explanation →
94
MCQmedium

A small business has a single access point that supports both 2.4 GHz and 5 GHz. Employees report that their smartphones connect to the 2.4 GHz band, causing slow internet speeds. Which configuration change should the technician make to prioritize 5 GHz for capable devices?

A.Disable the 2.4 GHz radio completely.
B.Enable band steering on the access point.
C.Set the 2.4 GHz channel to a non-overlapping channel like 1, 6, or 11.
D.Increase the transmit power of the 5 GHz radio.
AnswerB

Enabling band steering is an effective solution as it intelligently encourages dual-band client devices to connect to the less congested 5 GHz frequency band. This technology actively monitors client capabilities and signal strength, guiding compatible devices away from the often crowded 2.4 GHz band. This improves overall network performance, reduces interference, and optimizes throughput for all connected devices by balancing client distribution.

Why this answer

Band steering (also called client steering) is the correct solution because it actively encourages dual-band clients to connect to the less congested 5 GHz band by manipulating probe responses and beacon timing, without disabling the 2.4 GHz radio for legacy devices. This directly addresses the problem of smartphones preferring the 2.4 GHz band due to its stronger signal, while still allowing older 2.4 GHz-only devices to connect.

Exam trap

A common trap is to think that increasing 5 GHz transmit power or changing 2.4 GHz channels will fix client band preference, when the real solution is a client-steering mechanism like band steering.

How to eliminate wrong answers

Option A is wrong because completely disabling the 2.4 GHz radio would prevent legacy 2.4 GHz-only devices (e.g., older IoT sensors, some printers) from connecting, which is an overly aggressive solution that breaks connectivity for non-5 GHz clients. Option C is wrong because setting the 2.4 GHz channel to a non-overlapping channel (1, 6, or 11) reduces co-channel interference but does nothing to influence client band selection; smartphones will still prefer the 2.4 GHz band if its signal is stronger. Option D is wrong because increasing the transmit power of the 5 GHz radio may extend its range but does not force clients to choose 5 GHz; clients typically select the band with the highest RSSI, and 2.4 GHz often still appears stronger due to better propagation characteristics.

Full explanation →
95
MCQhard

A company deploys a new internal application that uses a custom TCP port. The application fails to connect from client workstations. A technician verifies that the server is running and the firewall allows outbound traffic. Which step should the technician take next to identify the port issue?

A.Run netstat on the server to see if the application is listening on the correct port.
B.Ping the server from a client to test network connectivity.
C.Use nslookup to verify the server's hostname resolves correctly.
D.Check the DHCP lease to ensure the client has a valid IP address.
AnswerA

Running netstat on the server is the most direct method to verify if the new application is actively listening for incoming connections on its designated port. This command displays active network connections, listening ports, and routing tables, allowing an administrator to confirm that the application process has successfully bound to the expected TCP or UDP port. If netstat does not show the application listening, it indicates a server-side configuration issue or that the application failed to start correctly, preventing client connections.

Why this answer

The technician needs to verify that the application is actually listening on the expected custom TCP port. Running `netstat -an` on the server will show all listening ports and their states; if the application's port is not listed, the application may be bound to a different port or not started correctly, which is a common cause of connection failures even when the server is running and outbound traffic is allowed.

Exam trap

Some candidates may think that ping or general network connectivity tests are sufficient to diagnose port-specific issues, but the trap here is that ICMP and TCP operate at different layers, and only a port-level check like netstat can confirm whether the application is listening on the correct TCP port.

How to eliminate wrong answers

Option B is wrong because ping uses ICMP, not TCP, and does not test connectivity to a specific TCP port; a successful ping only confirms basic network reachability, not that the custom port is open or the application is listening. Option C is wrong because nslookup tests DNS resolution, which is unrelated to TCP port connectivity; even if the hostname resolves correctly, the application may still fail if the port is not open. Option D is wrong because checking the DHCP lease verifies IP address assignment, but the technician has already confirmed the firewall allows outbound traffic and the server is running; a valid IP address does not guarantee the application's TCP port is accessible.

Full explanation →
96
MCQmedium

A small office is upgrading from 100Base-TX to 1000Base-T. The existing cabling is Cat5e, runs are under 50 meters, and terminations are T568B. After the upgrade, some workstations intermittently lose connectivity. What is the most likely issue?

A.The cable runs are too long for 1000Base-T.
B.The T568B wiring standard is incompatible with 1000Base-T.
C.The terminations are not fully seated or have poor contact on some pairs.
D.The network switch ports are set to 100 Mbps full duplex.
AnswerC

1000Base-T (Gigabit Ethernet) uniquely requires all four twisted pairs within a Category 5e or higher cable to transmit and receive data simultaneously, unlike 100Base-TX which only uses two pairs. If one or more pairs have poor contact due to improper termination (e.g., a partially seated RJ-45 connector or poorly punched down keystone jack), the connection will struggle to establish or maintain a stable 1000 Mbps link, often falling back to 100 Mbps or experiencing intermittent disconnections as the system attempts to negotiate the higher speed.

Why this answer

Cat5e supports 1000Base-T up to 100 meters, so the 50-meter runs and T568B wiring are both compliant. Intermittent connectivity after an upgrade most commonly stems from marginal terminations — a single poorly seated conductor or a bad crimp on one pair can cause link negotiation to flap or drop to lower speeds under Gigabit signaling, which uses all four pairs unlike 100Base-TX.

Exam trap

The trap is that candidates see 'Cat5e' and 'Gigabit' and assume a cabling category problem, when Cat5e is fully rated for 1000Base-T — the real issue is physical layer termination quality.

How to eliminate wrong answers

Option A is wrong because 1000Base-T supports runs up to 100 meters over Cat5e, and the stated runs are only 50 meters — well within spec. Option B is wrong because T568B is a valid, standards-compliant wiring scheme fully compatible with 1000Base-T; both T568A and T568B work as long as both ends match. Option D is wrong because a switch port hard-set to 100 Mbps full duplex would cause a consistent speed mismatch (or duplex mismatch), not intermittent connectivity, and would typically show as a stable 100 Mbps link rather than flapping.

Full explanation →
97
MCQmedium

A user reports that their iPhone 13 will not charge when plugged into the charging port. The user has tried different cables and power adapters, but the phone still does not charge. The phone's screen and buttons work normally. Which of the following is the most likely cause?

A.The battery is completely dead and needs replacement
B.The Lightning port is clogged with debris
C.The operating system is corrupted
D.The phone's wireless charging coil is damaged
AnswerB

Debris, such as lint, dust, or small particles, can accumulate at the bottom of the Lightning port, physically obstructing the connection between the cable's pins and the port's internal contacts. This physical barrier prevents the Lightning cable from fully seating and establishing the necessary electrical connection for power delivery. Consequently, the phone will not detect the charger, preventing any charging indicator from appearing and stopping power from reaching the battery.

Why this answer

The most likely cause is that the Lightning port is clogged with debris, such as lint or dust, which prevents the charging cable from making proper contact. Since the screen and buttons work normally, the phone is functional, and the issue is isolated to the charging port. Trying different cables and adapters rules out cable/adapter faults, pointing to a physical obstruction in the port.

Exam trap

220-1201 often tests the tendency to jump to complex causes (battery, OS, wireless coil) when the simplest physical explanation — debris in the port — is the correct answer, especially when the device otherwise functions normally.

How to eliminate wrong answers

Option A is wrong because a completely dead battery would prevent the phone from powering on at all, but the user reports the screen and buttons work normally, indicating the battery has some charge. Option C is wrong because a corrupted OS would cause software malfunctions, not a complete inability to charge; the phone would still show charging indicators if the port were functional. Option D is wrong because wireless charging coil damage would only affect wireless charging, not wired charging through the Lightning port.

Full explanation →
98
MCQmedium

A user's PC is running very slowly, and the hard drive activity LED is constantly lit even when idle. Task Manager shows 100% disk usage. Which component is most likely failing?

A.Insufficient RAM
B.Failing hard drive
C.CPU overheating
D.Malware infection
AnswerB

A failing hard drive is the most probable cause for persistent 100% disk activity, even at idle, combined with system slowness. The drive's firmware repeatedly attempts to read or write to bad sectors, leading to numerous retries and sector remapping operations. This constant, unsuccessful effort to access data keeps the disk busy, causing the activity LED to stay lit and diagnostic tools to report maximum utilization, often without any specific application actively using the disk. S.M.A.R.T. data can often confirm impending failure.

Why this answer

Constant 100% disk usage with no corresponding high CPU or memory usage is a classic sign of a failing hard drive, often due to bad sectors or mechanical wear. While a slow drive can be caused by malware or fragmentation, hardware failure is the primary suspect in this scenario.

Full explanation →
99
MCQeasy

A user wants to upgrade their laptop from a traditional HDD to an SSD for faster boot times. They have a SATA III interface available. Which type of SSD should you recommend for the best performance without requiring an adapter?

A.NVMe M.2 SSD
B.2.5-inch SATA SSD
C.mSATA SSD
D.External USB SSD
AnswerB

A 2.5-inch SATA SSD is the ideal upgrade because its physical form factor perfectly matches the existing 2.5-inch hard drive bay in the laptop. It connects to the identical SATA data and power connectors already present, ensuring seamless compatibility with the laptop's internal infrastructure. This allows for a straightforward, plug-and-play replacement, significantly boosting performance over an HDD.

Why this answer

A 2.5-inch SATA SSD is the direct replacement for a laptop HDD, using the same interface and form factor. NVMe M.2 drives require an M.2 slot, which this laptop may not have. mSATA is less common and not standard in most laptops.

Full explanation →
100
MCQmedium

A small office has a single switch connecting all workstations. Users report that they can see each other on the network but cannot access the internet. The router's link light is off. What should the technician check first?

A.Replace the switch.
B.Check the Ethernet cable between the switch and router.
C.Reboot all workstations.
D.Update the router's firmware.
AnswerB

Checking the Ethernet cable between the switch and router is the correct first step because a 'dead link light' is a direct indicator of a physical layer (Layer 1) issue. The cable is the most common and simplest point of failure in a network connection. Verifying its integrity, ensuring it is properly seated, or replacing it can quickly resolve many connectivity problems before moving to more complex diagnostics.

Why this answer

The router's link light being off indicates no physical link between the switch and router. Since users can see each other, the switch and workstations are functioning, so the most likely cause is a faulty or disconnected Ethernet cable between the switch and router. Checking this cable first is the logical step to restore the physical connection needed for internet access.

Exam trap

The trap here is that candidates might overlook the physical layer and jump to higher-level solutions like rebooting devices or updating firmware, but the link light off is a clear indicator of a Layer 1 problem.

How to eliminate wrong answers

Option A is wrong because replacing the switch is unnecessary since local connectivity works, proving the switch is operational. Option C is wrong because rebooting workstations won't fix a physical link issue between network devices. Option D is wrong because updating firmware is irrelevant when the link light is off, indicating a Layer 1 problem, not a software issue.

Full explanation →
101
MCQhard

A network administrator is deploying a new wireless network that requires users to authenticate using their domain credentials. The network uses WPA2-Enterprise. Which service must be configured to validate these credentials?

A.DHCP
B.DNS
C.RADIUS
D.NTP
AnswerC

RADIUS provides the centralised authentication, authorisation and accounting that WPA2-Enterprise requires: the access point forwards 802.1X credentials to the RADIUS server, which validates them against the domain directory. Without it, the AP cannot verify domain credentials, so RADIUS satisfies the stem's validation requirement.

Why this answer

WPA2-Enterprise uses 802.1X authentication, which requires a RADIUS server to validate domain credentials against an authentication backend such as Active Directory. The RADIUS server acts as the Authentication Server (AS) in the 802.1X framework, receiving EAP packets from the access point and verifying the user's credentials before granting network access.

Exam trap

The trap here is that candidates often confuse RADIUS with DHCP or DNS because they associate 'domain credentials' with Active Directory, but they forget that RADIUS is the service that actually performs the authentication handshake in an 802.1X environment.

How to eliminate wrong answers

Option A is wrong because DHCP dynamically assigns IP addresses and does not perform authentication or credential validation. Option B is wrong because DNS resolves hostnames to IP addresses and has no role in authenticating user credentials. Option D is wrong because NTP synchronizes clocks across network devices and is unrelated to authentication or credential validation.

Full explanation →
102
MCQmedium

A small business uses a thermal printer for shipping labels. Recently, the labels are printing with missing sections and uneven darkness. What is the most likely cause?

A.The label roll is loaded upside down.
B.The printer's platen roller is worn.
C.The thermal printhead is dirty or has a dead element.
D.The label stock is expired.
AnswerC

A thermal printhead contains an array of tiny heating elements that selectively apply heat to the thermal label stock. If these elements are dirty, accumulated debris can insulate them, preventing efficient heat transfer and resulting in faded or unprinted areas. Conversely, a 'dead' element is permanently non-functional, consistently failing to heat the paper in its specific location. Both conditions directly cause distinct missing sections, streaks, or uneven darkness in the printed output.

Why this answer

Missing sections and uneven darkness on a thermal label printer are classic symptoms of a dirty or damaged thermal printhead. A clogged element or debris on the printhead prevents heat from transferring to the thermal paper in specific spots, producing blank bands or faded areas. Cleaning the printhead with an isopropyl alcohol swab, or replacing it if elements are dead, resolves the issue.

Exam trap

The trap here is confusing printhead contamination (localized missing dots) with platen wear (uniform smearing), so candidates pick the roller answer when the symptom is specifically missing sections.

How to eliminate wrong answers

Option A is wrong because an upside-down label roll would produce completely blank labels or labels printed on the liner side, not partial missing sections with uneven darkness. Option B is wrong because a worn platen roller typically causes smearing, wrinkles, or consistent vertical streaks from uneven pressure, not localized missing sections. Option D is wrong because expired label stock degrades adhesive and coating quality but does not selectively blank out portions of the printed image.

Full explanation →
103
MCQhard

A user reports that after a recent iOS update, their banking app crashes every time they try to log in. Other apps work fine. The app was working before the update. What is the most likely cause and solution?

A.The iOS update corrupted the app's data; reinstalling the app will fix it.
B.The banking app is not compatible with the new iOS version and needs an update from the developer.
C.The user's account has been locked due to multiple failed login attempts.
D.The iOS update changed the device's security settings, blocking the app.
AnswerB

Major iOS updates frequently introduce significant changes to system frameworks, deprecate older APIs, and modify security protocols. An older banking application, not yet updated by its developer, may attempt to call functions or interact with the operating system in a way that is no longer supported or has changed behavior in the new iOS version. This incompatibility often results in the application crashing immediately upon attempting a critical function like logging in, as it encounters unexpected system responses.

Why this answer

The most likely cause is that the banking app is not yet compatible with the new iOS version. After a major iOS update, apps that rely on specific APIs or frameworks (e.g., Keychain, WebKit, or Secure Enclave) may break if the developer has not updated the app to support the new OS. The solution is for the developer to release an update that targets the new iOS SDK, and for the user to install that update from the App Store.

Exam trap

The 220-1201 exam often tests the concept that app crashes after an OS update are most commonly due to app-OS incompatibility, not data corruption or account issues, and the trap is that candidates mistakenly attribute the crash to corrupted data or security settings changes.

How to eliminate wrong answers

Option A is wrong because a corrupted app data scenario would typically cause crashes on launch or during general use, not exclusively at login, and reinstalling would not fix a fundamental API incompatibility introduced by the iOS update. Option C is wrong because account lockouts due to failed login attempts would produce a specific error message (e.g., 'Account locked') rather than a crash, and the user reports a crash, not a login denial. Option D is wrong because iOS updates do not arbitrarily change per-app security settings; while iOS may revoke or update permissions (e.g., Face ID/Touch ID), such changes would prompt the user for reauthorization, not cause a crash at login.

Full explanation →
104
MCQmedium

A user complains that their inkjet printer produces smudged output that rubs off when touched. The printer uses standard plain paper and the ink cartridges are original. What is the most likely cause?

A.The printhead is misaligned
B.The ink cartridges are counterfeit
C.The paper type setting is incorrect for the media
D.The fuser is malfunctioning
AnswerC

An incorrect paper type setting is a common cause of smudged prints from an inkjet printer. Printers adjust the amount of ink applied and the printhead's movement speed based on the selected media type to optimize absorption and drying. For instance, if the printer is set to "plain paper" but glossy photo paper is used, the printer will apply an ink volume suitable for highly absorbent plain paper, which is excessive for less absorbent glossy paper. This over-application of ink prevents proper drying, resulting in wet, smudged prints.

Why this answer

Smudged output that rubs off on plain paper typically indicates the printer is applying too much ink for the media type. When the paper type setting is set to a glossy or photo paper mode, the printer lays down more ink than plain paper can absorb, causing smudging and poor adhesion. Correcting the paper type setting to 'Plain Paper' resolves the issue.

Exam trap

CompTIA A+ often tests the tendency to jump to hardware causes (printhead, fuser) for print quality issues — candidates must first consider configuration settings like paper type before assuming a hardware fault.

How to eliminate wrong answers

Option A is wrong because printhead misalignment causes skewed, fuzzy, or banded output — not smudging that rubs off. Option B is wrong because counterfeit cartridges are a possibility but the question states the cartridges are original, ruling this out. Option D is wrong because a fuser is a laser printer component that melts toner onto paper; inkjet printers do not have fusers, so this is a category error.

Full explanation →
105
MCQhard

A user scans a document to a USB drive attached to the multifunction printer, but the file is saved as a TIFF image instead of a searchable PDF. The user needs the text to be selectable. What should the technician do?

A.Change the scan file format to JPEG.
B.Enable OCR in the printer's scan settings and select 'Searchable PDF' as the output format.
C.Increase the scan resolution to 1200 DPI.
D.Save the file to a network folder instead of USB.
AnswerB

Enabling Optical Character Recognition (OCR) in the scanner's settings is the correct approach to achieve selectable text. OCR technology analyzes the scanned image, identifies text characters, and converts them into machine-readable text. When combined with the 'Searchable PDF' output format, this extracted text is embedded as an invisible layer beneath the image, allowing users to select, copy, and search the document's content effectively.

Why this answer

A TIFF scan is a pure image with no text layer, so the text is not selectable. Enabling OCR in the printer's scan settings and choosing 'Searchable PDF' as the output format runs optical character recognition on the scanned image and embeds an invisible text layer behind the image, making the text selectable and searchable. This directly solves the user's requirement without changing hardware or workflow.

Exam trap

220-1201 often tests the confusion between image quality settings (DPI, format) and text extraction — candidates must recognize that only OCR creates a selectable text layer, regardless of resolution or file format.

How to eliminate wrong answers

Option A is wrong because JPEG is still a raster image format with no text layer — switching to JPEG would not make text selectable and would actually lose quality due to lossy compression. Option C is wrong because increasing resolution to 1200 DPI improves image fidelity but does not add a text layer; OCR is still required. Option D is wrong because changing the destination to a network folder only alters where the file is stored, not its format or searchability.

Full explanation →
106
MCQmedium

A technician is deploying a fleet of tablets for field workers who need to print invoices on a Bluetooth printer. The tablets are Android-based and support Bluetooth 5.0. The printer is an older model supporting Bluetooth 2.1. Which of the following is true about the compatibility between these devices?

A.The tablet will not be able to pair with the printer due to version mismatch.
B.The connection will operate at Bluetooth 5.0 speeds and range.
C.The tablet and printer will connect but only at Bluetooth 2.1 capabilities.
D.The printer must be upgraded to Bluetooth 4.0 to work with the tablet.
AnswerC

Due to Bluetooth's robust backward compatibility, the tablet and printer will successfully establish a connection. However, the operational capabilities of this link, such as data transfer rates, effective range, and available profiles, will be constrained by the older Bluetooth 2.1 standard. The connection will function, but only at the performance level supported by the least capable device involved.

Why this answer

Bluetooth is backward compatible, meaning a Bluetooth 5.0 device can connect to a Bluetooth 2.1 device. When paired, the connection negotiates the highest common version, which is Bluetooth 2.1. Therefore, the tablet and printer will connect but only at Bluetooth 2.1 capabilities, including its speed, range, and power consumption profile.

Exam trap

In CompTIA A+ exams, a common pitfall is assuming that newer Bluetooth versions are not backward compatible, leading candidates to incorrectly select version mismatch as a reason for failure.

How to eliminate wrong answers

Option A is wrong because Bluetooth is backward compatible; a version mismatch does not prevent pairing, as the devices negotiate the highest mutually supported version. Option B is wrong because the connection will not operate at Bluetooth 5.0 speeds and range; it will fall back to the older printer's Bluetooth 2.1 capabilities. Option D is wrong because the printer does not need to be upgraded; Bluetooth 5.0 devices are designed to work with older versions like 2.1 without any hardware changes.

Full explanation →
107
MCQmedium

A technician is deploying a new network in a warehouse and needs to connect two separate switches that are 120 meters apart. The cable run must support 1 Gbps speeds. Which networking hardware component should be used to ensure reliable connectivity?

A.Use a single 120-meter Cat6 cable.
B.Install a switch at the 60-meter midpoint and use two Cat6 cables.
C.Use a fiber optic cable with media converters on both ends.
D.Replace one switch with a hub to increase signal strength.
AnswerB

Installing an Ethernet switch at the 60-meter midpoint effectively breaks the 120-meter run into two separate 60-meter segments. Each segment then falls well within the 100-meter maximum distance specified for Cat6 cables under IEEE 802.3 standards. The switch actively regenerates the electrical signal before forwarding it, counteracting signal attenuation and ensuring reliable, high-speed data transmission across the entire 120-meter distance without exceeding any segment limitations.

Why this answer

A single Cat6 cable is limited to 100 meters for 1 Gbps Ethernet (per TIA/EIA-568 standards). By placing a switch at the 60-meter midpoint, you effectively create two separate 60-meter segments, each well within the 100-meter limit, ensuring reliable 1 Gbps connectivity. The switch regenerates the signal, overcoming the distance limitation without violating the standard.

Exam trap

The trap here is that candidates assume a single cable can exceed 100 meters if it is high-quality Cat6, but the 100-meter limit is a hard standard for 1 Gbps Ethernet, not a suggestion; exceeding it risks intermittent connectivity or complete link failure.

How to eliminate wrong answers

Option A is wrong because a single 120-meter Cat6 cable exceeds the 100-meter maximum segment length for 1 Gbps Ethernet, which would cause signal attenuation, increased jitter, and potential link failures. Option C is wrong because while fiber optic cable with media converters can handle distances over 120 meters at 1 Gbps, it is not the most straightforward or cost-effective solution for this specific scenario; the question asks for a component to ensure reliable connectivity, and a switch with two Cat6 cables is a simpler, standards-compliant approach. Option D is wrong because a hub does not increase signal strength; it operates at Layer 1, simply repeating electrical signals without regeneration, and would still be subject to the same 100-meter distance limitation, plus it introduces collision domains and halves the effective bandwidth in half-duplex mode.

Full explanation →
108
MCQmedium

A technician is setting up a Windows 10 tablet for a field worker who needs to use a legacy line-of-business (LOB) app that only runs in 32-bit mode. The tablet has a 64-bit processor and Windows 10 Pro. How should the technician ensure the app runs correctly?

A.Install the app in a virtual machine running 32-bit Windows.
B.Enable Windows 8 compatibility mode for the app.
C.Install the app normally; 32-bit apps are supported on 64-bit Windows.
D.Download and install the 64-bit version of the app from the vendor.
AnswerC

This is the correct approach because 64-bit versions of Windows are designed with backward compatibility for 32-bit applications. The Windows on Windows 64-bit (WOW64) subsystem provides an emulation layer that allows 32-bit applications to run seamlessly on a 64-bit operating system. This subsystem handles necessary file and registry redirection, enabling the application to install and execute without requiring any special configuration or virtualized environments.

Why this answer

Windows 10 64-bit includes the Windows-on-Windows 64-bit (WOW64) subsystem, which provides full compatibility for 32-bit applications without any additional configuration. Since the legacy LOB app is a 32-bit x86 application, it will run natively under WOW64 on the 64-bit version of Windows 10 Pro. No virtualization, compatibility mode changes, or separate 64-bit version is required.

Exam trap

The trap here is that candidates may overcomplicate the solution by assuming a 32-bit app cannot run on 64-bit Windows, leading them to choose virtualization or compatibility mode, when in fact WOW64 provides built-in support for 32-bit applications on 64-bit Windows.

How to eliminate wrong answers

Option A is wrong because installing a separate virtual machine running 32-bit Windows is unnecessary overhead; WOW64 already provides native 32-bit compatibility on 64-bit Windows 10. Option B is wrong because Windows 8 compatibility mode is designed to address application compatibility issues with newer OS versions, not to enable 32-bit execution on a 64-bit system; the app will run without compatibility mode. Option D is wrong because the app is a legacy line-of-business application that only runs in 32-bit mode; a 64-bit version does not exist, and even if it did, the question specifies the app only runs in 32-bit mode.

Full explanation →
109
MCQeasy

A small office has a single internet connection and needs to allow multiple internal devices to share that connection. The router's public IP is assigned by the ISP. Which network service must be enabled on the router to allow internal devices to communicate with external servers?

A.DHCP
B.DNS
C.NAT
D.PAT
AnswerC

NAT (Network Address Translation) is a fundamental networking service that modifies the network address information in the IP header of packets as they traverse a router. It specifically translates private, non-routable IP addresses used within a local network into a single, routable public IP address assigned to the router's external interface. This process enables multiple devices on a private network to simultaneously share one public IP address for outbound internet access, conserving public IPv4 addresses and enhancing security by obscuring the internal network topology.

Why this answer

NAT (Network Address Translation) is required because it allows multiple internal devices with private IP addresses to share a single public IP address assigned by the ISP. When internal devices send traffic to external servers, NAT translates the private source IP and port to the router's public IP and a unique port, enabling responses to return to the correct internal host. Without NAT, the router would drop packets from private addresses destined for the internet, as they are not routable on the public internet.

Exam trap

Candidates often mistakenly choose PAT because they think it is the only method for sharing a single IP, but the question asks for the general service (NAT) that enables multiple devices to share a connection, and PAT is just a subset of NAT.

How to eliminate wrong answers

Option A is wrong because DHCP (Dynamic Host Configuration Protocol) assigns IP addresses, subnet masks, and other configuration to internal devices, but it does not perform any translation between private and public addresses; it only manages local addressing. Option B is wrong because DNS (Domain Name System) resolves domain names to IP addresses, but it does not enable private IPs to communicate with external servers; it only provides name resolution services. Option D is wrong because PAT (Port Address Translation) is a specific form of NAT that uses port numbers to map multiple internal addresses to a single public IP; while PAT is commonly used, the question asks for the general service that allows internal devices to share a connection, and NAT is the broader, correct term that encompasses both basic NAT and PAT.

Full explanation →
110
MCQmedium

A customer complains that their wireless network is slow and frequently drops connections. They live in a densely populated apartment building. The technician checks the wireless router and sees it is using channel 1. What is the most likely cause of the issue?

A.The router is too far from the devices
B.The router's firmware is outdated
C.There is interference from other wireless networks on the same channel
D.The router is using 5 GHz instead of 2.4 GHz
AnswerC

In densely populated areas, numerous Wi-Fi networks often operate within close proximity, frequently sharing the same limited number of non-overlapping channels (e.g., 1, 6, 11 for 2.4 GHz). When multiple access points transmit on the same channel, they create co-channel interference, forcing devices to retransmit data and contend for airtime. This contention significantly reduces effective throughput and leads to a perception of a "slow" network, as devices spend more time waiting or re-sending packets.

Why this answer

In a densely populated apartment building, many 2.4 GHz networks compete for the same limited channels. Channel 1 overlaps with channels 2–5, and if neighboring routers also use channel 1 or nearby channels, co-channel and adjacent-channel interference cause slow speeds and dropped connections.

Exam trap

220-1201 often tests the misconception that 5 GHz is worse than 2.4 GHz, when in fact 5 GHz has more channels and less interference — the real culprit in dense environments is 2.4 GHz channel overlap.

How to eliminate wrong answers

Option A is wrong because distance issues would affect signal strength uniformly and typically show as low signal bars, not intermittent drops in a small apartment. Option B is wrong because outdated firmware rarely causes the specific symptom of channel-based interference in a dense RF environment; it's a generic troubleshooting step, not the most likely cause. Option D is wrong because 5 GHz actually has more non-overlapping channels and less interference than 2.4 GHz — using 5 GHz would improve, not degrade, performance in a crowded building.

Full explanation →
111
MCQeasy

A customer reports that their smart TV, which is connected to the home network via Wi-Fi, can stream video from the internet but cannot access media files stored on a wired desktop PC in the same home. The TV and PC are on the same IP subnet. Which network type is most likely being used, and why does this cause the issue?

A.Client-server network; the TV cannot authenticate to the server.
B.Peer-to-peer network; the TV and PC may be in different workgroups or have disabled file sharing.
C.Mesh network; the TV is connected to a different mesh node that blocks local traffic.
D.PAN network; the TV is using Bluetooth instead of Wi-Fi.
AnswerB

In a peer-to-peer network, devices directly share resources without a central server, which is common for local media streaming between a smart TV and a PC. If the TV and PC are configured in different workgroups or domains, or if file and media sharing services are disabled on either device, they will be unable to discover and access each other's local content. This specific configuration issue explains why internet streaming works (as it's an external service) but local network discovery and sharing fail.

Why this answer

A peer-to-peer (P2P) network typically uses workgroups and relies on each device to share resources individually. The TV can stream from the internet (using a client-server model with a remote streaming service) but cannot access local files because the PC may be in a different workgroup, have file sharing disabled, or require SMB/CIFS authentication that the TV cannot perform. Since both devices are on the same IP subnet, the issue is not routing but rather the lack of a centralized authentication or discovery mechanism, which is characteristic of a P2P network.

Exam trap

The 220-1201 exam often tests the misconception that 'same subnet equals automatic file access,' leading candidates to overlook the workgroup and file-sharing configuration differences inherent in peer-to-peer networks.

How to eliminate wrong answers

Option A is wrong because a client-server network would have a central server that authenticates clients and provides file access; if the TV could stream from the internet (which itself is a client-server model), it would likely be able to authenticate to a local server if one existed, and the problem description does not indicate authentication failure. Option C is wrong because a mesh network routes traffic between nodes and does not inherently block local traffic; if the TV and PC are on the same subnet, a mesh network would forward local traffic normally, and the issue is not about node isolation. Option D is wrong because a PAN (Personal Area Network) using Bluetooth would not allow the TV to stream video from the internet over Wi-Fi; the TV is explicitly connected via Wi-Fi, and Bluetooth has insufficient bandwidth for video streaming.

Full explanation →
112
MCQmedium

During a printer deployment, a technician installs a network laser printer and configures it with a static IP address. Users can print from their computers, but the printer's web interface is unreachable from any browser. What is the most likely cause?

A.The printer's IP address is on a different subnet
B.The printer's embedded web server is disabled
C.The printer driver is outdated
D.The printer's firmware needs updating
AnswerB

The embedded web server (EWS) on a network printer operates as a distinct service, typically listening on standard HTTP/HTTPS ports for browser-based management. For security reasons or administrative preferences, this specific service can be intentionally disabled while other printer services, such as those handling print job queues (e.g., LPR, IPP), remain active. Therefore, printing can function normally even if the EWS is turned off, making its web interface unreachable.

Why this answer

If users can print successfully but the printer's web interface is unreachable, the most likely cause is that the printer's embedded web server (EWS) is disabled. Many network printers have an option in the control panel or configuration menu to enable/disable the web server for security reasons. When disabled, the printer still responds to print jobs (via IPP, LPD, or raw port 9100) but does not serve HTTP/HTTPS pages.

This matches the symptom of printing working while the web UI is inaccessible.

Exam trap

220-1201 often tests the separation of printing protocols from management interfaces; candidates assume a network issue, but the printer's web server being disabled is a common, easily overlooked cause.

How to eliminate wrong answers

Option A is wrong because if the printer's IP were on a different subnet, users on the same subnet would not be able to print either (unless routing is configured, but then the web UI would also be reachable via routing). Option C is wrong because an outdated driver would affect printing, not the web interface; printing works, so the driver is fine. Option D is wrong because firmware issues could cause various problems, but a disabled EWS is a more direct and common cause of the specific symptom (printing works, web UI doesn't).

Full explanation →
113
MCQeasy

A user complains that their computer sometimes fails to boot and emits a series of long beeps. After several attempts, it boots normally. Which motherboard component is most likely failing?

A.The CPU
B.The power supply
C.The RAM modules
D.The hard drive
AnswerC

The RAM modules are a highly probable cause for intermittent boot failures accompanied by long beeps. Most BIOS/UEFI implementations utilize specific beep patterns during the Power-On Self-Test (POST) to signal memory-related issues, with long beeps frequently indicating a problem with RAM detection, integrity, or improper seating. Intermittent failures suggest a loose, partially failing, or incompatible RAM module that sometimes passes initial checks but fails under specific conditions or due to poor contact.

Why this answer

A series of long beeps during POST typically indicates a memory (RAM) issue. Intermittent boot failures with beep codes point to a failing RAM module, a dirty contact, or a loose connection. The beep code is a diagnostic tool from the motherboard's BIOS.

Full explanation →
114
MCQmedium

A user reports that their computer intermittently freezes for a few seconds during normal use. The technician checks Event Viewer and finds 'WHEA-Logger' errors related to the CPU. What is the most likely cause?

A.Outdated graphics driver
B.CPU overheating
C.Unstable CPU overclock or insufficient voltage
D.Faulty hard drive
AnswerC

An unstable CPU overclock or insufficient voltage supply to the processor is a primary cause of WHEA-Logger errors, particularly those related to corrected or uncorrected hardware errors. When a CPU is pushed beyond its stable operating parameters or not provided with adequate power, it can lead to transient calculation errors, data corruption within the CPU's registers, or communication failures with other components, resulting in system freezes and the logging of these critical hardware events.

Why this answer

WHEA-Logger errors (Windows Hardware Error Architecture) related to the CPU typically indicate hardware-level errors such as machine check exceptions, cache errors, or thermal issues. Intermittent freezes combined with CPU-related WHEA errors most commonly point to an unstable CPU overclock or insufficient voltage, which causes the CPU to throw correctable or uncorrectable errors under load.

Exam trap

220-1201 often tests the confusion between WHEA-Logger errors and driver or disk issues, where candidates pick graphics drivers or hard drives instead of recognizing WHEA as a hardware error framework pointing to CPU instability.

How to eliminate wrong answers

Option A is wrong because outdated graphics drivers cause display issues or crashes, not WHEA-Logger CPU errors — WHEA is a hardware error reporting framework, not a driver issue. Option B is wrong because CPU overheating typically triggers thermal throttling and may log WHEA errors, but the question specifies intermittent freezes with WHEA CPU errors; overheating is a possible cause but less specific than an unstable overclock, and the most likely cause given WHEA CPU errors is voltage/overclock instability. Option D is wrong because a faulty hard drive would produce disk-related errors (e.g., Event ID 7, 51, 153) and I/O freezes, not WHEA-Logger CPU errors.

Full explanation →
115
MCQhard

A technician is troubleshooting a PC that boots to a black screen with a blinking cursor after the BIOS screen. The system has a single SSD with the OS installed. The BIOS detects the SSD. What is the most likely cause?

A.The SSD is not properly formatted
B.The bootloader is corrupted
C.The RAM is faulty
D.The power supply is underpowered
AnswerB

The bootloader is a critical piece of software responsible for initiating the operating system after the BIOS/UEFI POST completes. If the bootloader, such as GRUB or Windows Boot Manager, becomes corrupted or is missing from the boot sector or EFI System Partition, the system will successfully complete POST and find the boot device, but it will then fail to load the OS kernel. This often manifests as a blinking cursor on a black screen, indicating the system is stuck trying to execute corrupted boot instructions.

Why this answer

A black screen with a blinking cursor after POST indicates the BIOS found a bootable device but cannot locate the bootloader. This is often due to a corrupted Master Boot Record (MBR) or GUID Partition Table (GPT). The technician should boot from installation media and use the Startup Repair or bootrec commands to rebuild the bootloader.

Full explanation →
116
MCQmedium

A technician is upgrading the RAM in a laptop. After installing two new 8GB sticks, the laptop fails to boot and emits a series of beeps. What is the most likely cause?

A.The RAM is not compatible with the motherboard.
B.The RAM modules are not fully seated in the slots.
C.The laptop's BIOS needs to be updated.
D.The RAM was installed in the wrong orientation.
AnswerB

Improperly seated RAM modules are a very common cause of memory-related beep codes during system startup. If a module is not fully pushed into its slot until the side retention clips audibly click into place, some of its electrical contacts may not connect properly with the motherboard. This incomplete connection prevents the Power-On Self-Test (POST) from successfully initializing the memory, triggering the diagnostic beep sequence.

Why this answer

The most likely cause is that the RAM modules are not fully seated in the slots. When RAM is not properly inserted, the laptop's POST (Power-On Self-Test) fails, and the system emits a series of beeps to indicate a memory error. This is a common issue after installation, as RAM requires firm, even pressure to click into place and make full contact with the slot's pins.

Exam trap

The 220-1201 exam often tests the misconception that RAM incompatibility is the primary cause of boot failures after an upgrade, but the trap here is that the beep code and recent physical installation strongly suggest a seating issue rather than a compatibility or firmware problem.

How to eliminate wrong answers

Option A is wrong because RAM incompatibility typically prevents the system from posting with a different beep pattern or no boot at all, but the specific symptom of beeps after installing new RAM that matches the correct type (e.g., DDR4, SODIMM) is more indicative of a seating issue. Option C is wrong because a BIOS update is rarely required for standard RAM upgrades; the BIOS usually auto-detects compatible RAM, and a failure to boot with beeps points to a hardware connection problem, not a firmware version mismatch. Option D is wrong because RAM modules are keyed with a notch to prevent incorrect orientation; if the RAM were installed backwards, it would not fit into the slot without excessive force, and the technician would likely notice the physical misalignment before powering on.

Full explanation →
117
MCQeasy

During a routine hardware upgrade, you install a new PCIe x16 graphics card into a desktop motherboard. The system powers on, but the display remains blank. The graphics card's fans are spinning. What should you check first on the motherboard?

A.The BIOS settings for primary display adapter
B.The monitor cable is connected to the graphics card, not the motherboard
C.The graphics card power connectors are properly attached
D.The PCIe slot is damaged
AnswerB

When a dedicated graphics card is installed, the system's BIOS/UEFI typically disables the integrated graphics chipset on the motherboard to prevent resource conflicts and optimize performance. Consequently, if the monitor cable remains connected to the motherboard's video output port instead of the new dedicated graphics card, no display signal will be transmitted, even if the dedicated card is fully functional and its cooling fans are operating.

Why this answer

The most common cause of a blank display after installing a discrete GPU is that the monitor cable is still plugged into the motherboard's integrated video output rather than the new card's ports. Since the GPU fans spin, the card is receiving power, so the first and simplest check is verifying the cable is on the graphics card. This is a physical, no-cost check that resolves the majority of 'no signal' cases.

Exam trap

220-1201 often tests the trap of jumping to complex causes (BIOS, power, dead slot) when the simplest physical cabling mistake — monitor plugged into the motherboard instead of the new GPU — is the actual answer.

How to eliminate wrong answers

Option A is wrong as a first step because BIOS primary-display settings only matter after you confirm the cable is on the correct output; it is a secondary troubleshooting step. Option C is wrong because the fans spinning indicates the card is powered, and even inadequate auxiliary power usually still allows POST video; it is not the first thing to check. Option D is wrong because a damaged PCIe slot is a rare, last-resort diagnosis — you would not assume hardware failure before verifying cabling.

Full explanation →
118
MCQhard

A technician is installing a new touchscreen monitor for a point-of-sale system. The monitor connects via HDMI and USB. The display works, but touch input is not recognized. What should the technician check first?

A.Ensure the HDMI cable is securely connected
B.Install the touchscreen driver from the manufacturer
C.Replace the USB cable with a higher-speed version
D.Calibrate the touchscreen in Windows settings
AnswerB

A touchscreen, like most peripheral devices, requires a specific device driver to function properly. This driver acts as a crucial software interface, allowing the operating system to communicate with the hardware, interpret raw touch input signals received via the USB data connection, and translate them into actionable commands. Without the correct driver installed, the system cannot recognize or process the touch data, rendering the touchscreen unresponsive to user input.

Why this answer

Touchscreen monitors often require both video (HDMI) and data (USB) connections. The USB cable provides the touch data to the computer. If the driver is missing or the USB connection is faulty, touch input won't work.

The first step is to verify the USB connection and install the correct driver.

Full explanation →
119
MCQeasy

A user wants to wirelessly stream music from their smartphone to a Bluetooth speaker in the same room. Which network type is being used for this connection?

A.Local Area Network (LAN)
B.Wide Area Network (WAN)
C.Personal Area Network (PAN)
D.Metropolitan Area Network (MAN)
AnswerC

A Personal Area Network (PAN) is specifically designed for short-range communication among personal devices within an individual's immediate workspace, typically extending only a few meters. Bluetooth is the quintessential technology for establishing a PAN, enabling direct wireless connections between devices like smartphones, wireless headphones, smartwatches, and portable speakers for tasks such as audio streaming or data synchronization. This direct, low-power link is ideal for wirelessly connecting a phone to a speaker.

Why this answer

C is correct because a Bluetooth connection between a smartphone and a speaker operates within a Personal Area Network (PAN). PANs are defined by IEEE 802.15 and cover a short-range, ad-hoc wireless link (typically up to 10 meters) designed for personal device interconnectivity, which matches the Bluetooth streaming scenario exactly.

Exam trap

The 220-1201 exam often tests the distinction between PAN and LAN by presenting a Bluetooth scenario, where candidates mistakenly choose LAN because they associate 'wireless' with Wi-Fi, forgetting that Bluetooth is a separate PAN technology defined by IEEE 802.15, not 802.11.

How to eliminate wrong answers

Option A is wrong because a Local Area Network (LAN) connects multiple devices over a larger area (e.g., a building) using protocols like Ethernet or Wi-Fi, and is not designed for the direct, point-to-point Bluetooth link between a phone and a speaker. Option B is wrong because a Wide Area Network (WAN) spans large geographic distances (e.g., the internet) and relies on routers and leased lines, not a short-range personal connection. Option D is wrong because a Metropolitan Area Network (MAN) covers a city-sized area (e.g., a municipal Wi-Fi network) and is far too large in scope for a single-room Bluetooth stream.

Full explanation →
120
MCQhard

A user reports that their laser printer jams frequently, but only when printing on both sides (duplex). Single-sided printing works fine. The technician has inspected the paper and it is within specifications. What is the most likely cause of this issue?

A.The paper is too thick for duplex printing.
B.The duplex unit is misaligned or has a mechanical fault.
C.The fuser roller is worn out.
D.The printer driver is set to 'duplex' incorrectly.
AnswerB

A laser printer's duplex unit is a specialized mechanism responsible for flipping the paper after the first side is printed and accurately refeeding it into the paper path for the second side. If this unit is misaligned, has worn gears, or a faulty sensor, it can cause the paper to buckle, snag, or fail to feed correctly during the reversal process. This specific fault would only manifest as frequent jams when attempting double-sided prints, leaving simplex (single-sided) printing unaffected, which aligns perfectly with the user's reported symptoms.

Why this answer

Duplex jams often occur because the duplex unit (the mechanism that flips the paper) is misaligned or has a broken gear. Single-sided printing bypasses this unit, so it works fine. Other causes like paper path rollers or fuser issues would typically affect both simplex and duplex printing.

Full explanation →
121
MCQeasy

A user's laser printer is producing pages with a repeating horizontal line defect every 3.75 inches. Which component is most likely causing this issue?

A.Fuser roller
B.Transfer roller
C.Toner cartridge
D.OPC drum
AnswerD

The Organic Photo-Conductive (OPC) drum is the primary image-forming component in a laser printer, where the latent image is created and then attracts toner. A scratch or defect on the drum's surface will consistently pick up or repel toner incorrectly at that specific point during each rotation. Given that the OPC drum typically has a circumference of approximately 3.75 inches, this defect will reliably appear as a repeating horizontal line on the printed page at that precise interval.

Why this answer

A repeating horizontal line defect at a fixed interval points to a rotating component whose circumference matches that interval. The OPC (organic photoconductor) drum is the component most commonly associated with a 3.75-inch repeat distance on laser printers — a scratch, gouge, or contaminant on the drum surface produces a line at the same position on every revolution, which translates to a fixed spacing on the page.

Exam trap

220-1201 often tests the ability to distinguish repeating-defect intervals by component circumference, catching candidates who guess 'fuser' for any horizontal line without measuring the repeat distance.

How to eliminate wrong answers

Option A is wrong because fuser roller defects typically repeat at a different interval (often around 2–3 inches depending on the roller diameter) and usually manifest as smudging, offset, or a glossy band rather than a sharp horizontal line. Option B is wrong because transfer roller defects cause faint or missing image transfer, not a repeating sharp line at a drum-circumference interval. Option C is wrong because toner cartridge defects (other than the drum, which is often integrated) tend to produce streaking, blotches, or vertical lines from the toner roller, not a horizontal line at a 3.75-inch repeat.

Full explanation →
122
MCQhard

A user says their inkjet printer prints colors that are slightly misaligned, with text appearing blurry. The printer has been used heavily for months. Which component should be checked or calibrated first?

A.The ink cartridge nozzles
B.The printhead alignment
C.The paper type setting
D.The printer driver version
AnswerB

Incorrect printhead alignment is a common cause for colors appearing offset, blurry, or misregistered on an inkjet printer. When the printhead's individual nozzles are not precisely positioned relative to each other or the paper's movement, the different color inks (CMYK) will not be laid down in their correct overlapping positions, leading to visible color fringing, ghosting, or a general lack of sharpness in the printed image. Performing a printhead calibration or alignment utility typically resolves this issue.

Why this answer

Misaligned colors and blurry text on an inkjet printer typically indicate that the printhead alignment is off. Most inkjet printers have a built-in alignment utility that prints a test page and adjusts the printhead position. Running this calibration is the standard first step.

Full explanation →
123
MCQhard

A desktop PC fails to power on. The technician measures the voltage on the 24-pin motherboard connector and finds that the purple wire (5VSB) reads 4.9V, but the green wire (PS_ON) reads 0V when the power button is pressed. What does this indicate?

A.The power supply is faulty and needs replacement.
B.The motherboard is not sending the PS_ON signal, likely due to a fault.
C.The power supply's +12V rail is shorted, causing overcurrent protection.
D.The front panel power switch is stuck in the closed position.
AnswerA

The 5VSB is present and PS_ON goes low when the button is pressed, showing the motherboard is sending the correct signal. The PSU fails to start, indicating an internal fault. Replacement is the appropriate action.

Why this answer

A desktop PC fails to power on. Measurements: 5VSB is present (4.9V is within tolerance), indicating the power supply is receiving AC power and its standby circuitry is working. When the power button is pressed, PS_ON is pulled low (0V) by the motherboard, which is the correct signal to request the PSU to turn on.

Since the PSU does not start (fans don't spin, no other outputs), the fault lies within the power supply itself. A faulty PSU may have a failed main switching circuit or other internal defect preventing it from responding to the PS_ON signal. Therefore, the power supply should be replaced.

Option B is incorrect because a low PS_ON indicates the motherboard is functioning correctly in this regard.

Full explanation →
124
MCQhard

An office manager wants to restrict color printing on the multifunction printer to only certain users to save costs. The printer supports user authentication. What is the best way to implement this?

A.Remove the color toner cartridges and only install black.
B.Configure the printer driver to default to black and white.
C.Enable user authentication on the printer and assign color printing permissions only to authorized users.
D.Set up a print server with group policies to block color jobs.
AnswerC

Enabling user authentication directly on the printer or through a centralized print server allows for identity-based access control. By requiring users to authenticate before printing, an administrator can then assign specific permissions, such as the ability to print in color, only to authorized individuals or groups. This method provides the most granular and secure control, ensuring that only designated users can utilize the color printing functionality.

Why this answer

The printer supports user authentication, which means it can identify individual users before processing a job. By enabling authentication and assigning color printing permissions only to authorized users, the office manager enforces the restriction at the device level, ensuring that only approved users can print in color regardless of driver settings. This is the most direct and enforceable method because it ties color access to identity rather than to a default setting that users can override.

Exam trap

The trap here is confusing a default setting (which users can change) with an enforced permission (which they cannot), so candidates pick the driver default or group policy instead of the printer's native authentication and authorization.

How to eliminate wrong answers

Option A is wrong because physically removing color toner disables color printing for everyone, including authorized users, and is not a permission-based solution. Option B is wrong because setting the driver default to black and white is only a convenience setting that any user can change in the print dialog, so it does not restrict color printing. Option D is wrong because a print server with group policies can block color jobs, but it adds unnecessary infrastructure and complexity when the printer itself already supports user authentication and per-user permissions.

Full explanation →
125
MCQeasy

A user's Android phone will not charge when plugged into a car's USB port, but charges fine with a wall adapter. The car's USB port powers other devices. What is the most likely issue?

A.The car's USB port is faulty.
B.The phone's USB port is damaged.
C.The car USB port does not supply enough current.
D.The USB cable is incompatible.
AnswerC

Modern Android smartphones often require a minimum current of 1 Ampere (A) or more to initiate and sustain charging, especially while the device is in use. Many older or standard car USB ports are designed primarily for data transfer or low-power accessories, typically supplying only 0.5A (500mA) at 5V. This insufficient current means the phone detects power but not enough to actively charge its battery, leading to the observed behavior where it appears not to charge.

Why this answer

The car's USB port likely follows the USB Battery Charging Specification (BCS) 1.2, which defines a Dedicated Charging Port (DCP) as capable of supplying up to 1.5 A. However, many car USB ports are designed only for data transfer and provide a standard downstream port (SDP) limited to 500 mA (USB 2.0) or 900 mA (USB 3.0). The phone's charging circuit detects the available current via USB data line handshaking; if the port cannot supply enough current, the phone may refuse to charge or charge very slowly.

Since the wall adapter provides adequate current (typically 1–2 A), the phone charges normally, isolating the issue to insufficient current from the car's port.

Exam trap

The trap here is that candidates assume any USB port that powers other devices must be capable of charging any phone, but the CompTIA A+ 220-1201 exam tests the distinction between USB port types (SDP vs. DCP) and the current negotiation required for modern smartphones.

How to eliminate wrong answers

Option A is wrong because the car's USB port powers other devices, indicating it is functional and not faulty. Option B is wrong because the phone charges fine with a wall adapter, proving the phone's USB port is not damaged. Option D is wrong because USB cables are generally backward-compatible and do not limit current delivery; an incompatible cable would cause issues with both the car and wall adapter, not just the car.

Full explanation →
126
MCQmedium

A user reports that their smartphone's mobile hotspot stops working after a few minutes of use. The laptop connected to it loses internet access. What is the most likely cause?

A.The laptop's Wi-Fi adapter is faulty.
B.The smartphone's hotspot timeout setting is enabled.
C.The smartphone's cellular signal is too weak.
D.The laptop has a static IP address configured.
AnswerB

Many smartphones incorporate a configurable 'hotspot timeout' setting, which is designed to automatically deactivate the mobile hotspot feature after a period of inactivity or a predetermined duration. This power-saving mechanism conserves battery life and mobile data by shutting down the Wi-Fi broadcast when no active data transfer is occurring, directly explaining why the hotspot connection would unexpectedly stop and require re-activation.

Why this answer

The most likely cause is that the smartphone's hotspot timeout setting is enabled. Many smartphones have a built-in power-saving feature that automatically disables the mobile hotspot after a period of inactivity (e.g., 5 or 10 minutes) to conserve battery and data. When this timeout triggers, the hotspot stops broadcasting, causing the connected laptop to lose internet access.

Exam trap

The trap here is that candidates often assume the issue is with the laptop or the cellular signal, overlooking the smartphone's power-saving timeout feature that is specifically designed to disable the hotspot after a period of inactivity.

How to eliminate wrong answers

Option A is wrong because a faulty laptop Wi-Fi adapter would typically cause persistent connectivity issues or failure to connect at all, not a consistent loss of internet after a few minutes of use. Option C is wrong because weak cellular signal would cause slow speeds or intermittent drops, but the hotspot would remain active; the symptom described is the hotspot itself stopping, not just poor performance. Option D is wrong because a static IP address on the laptop would cause a configuration mismatch or inability to obtain an IP from the hotspot's DHCP server, but it would not cause the hotspot to stop working after a few minutes.

Full explanation →
127
MCQhard

A company deploys a load balancer to distribute traffic across three web servers. Users report that they occasionally see outdated content or are asked to log in repeatedly. Which network service configuration is most likely missing to maintain session persistence?

A.DNS round-robin
B.Session persistence (sticky sessions)
C.DHCP reservation
D.Port forwarding
AnswerB

Session persistence, or sticky sessions, binds a client's requests to the same backend server for the duration of a session. Without it, the load balancer distributes each request independently, so users hit different servers, seeing stale cached content or losing their authenticated session state.

Why this answer

Session persistence (sticky sessions) ensures that all requests from a given user session are directed to the same backend web server. Without it, the load balancer may distribute requests across different servers, causing the user to see outdated content if one server has stale cached data, or to be asked to log in repeatedly if the session state is stored locally on each server rather than in a shared database.

Exam trap

CompTIA A+ often tests the distinction between load balancing (distributing traffic) and session persistence (keeping a user on the same server), and the trap here is that candidates may confuse DNS round-robin with a valid persistence mechanism, not realizing it only distributes initial connections and does not maintain stickiness.

How to eliminate wrong answers

Option A is wrong because DNS round-robin is a load distribution method that resolves a domain name to multiple IP addresses in rotation; it does not provide session persistence and can actually exacerbate the problem by directing users to different servers on each request. Option C is wrong because DHCP reservation assigns a fixed IP address to a device on the network, which is unrelated to maintaining user session state across web servers. Option D is wrong because port forwarding simply redirects traffic from one port to another on a router or firewall and has no mechanism to bind a user's session to a specific backend server.

Full explanation →
128
MCQhard

A user's smartphone can connect to a corporate Wi-Fi network but cannot access any internet sites. Other devices on the same network work fine. The smartphone shows it is connected with full signal. What is the most likely cause?

A.The smartphone's DNS settings are misconfigured or pointing to a non-functional server.
B.The corporate network is blocking the smartphone's MAC address.
C.The smartphone's Wi-Fi adapter is faulty.
D.The corporate proxy server is down.
AnswerA

If the smartphone's DNS settings are misconfigured or pointing to a non-functional server, the device can successfully connect to the Wi-Fi network and obtain an IP address. However, it will be unable to translate human-readable domain names (like google.com) into numerical IP addresses. This prevents the smartphone from reaching internet websites, even though its local network connectivity is otherwise functional, leading to the symptom of being connected but having no internet access.

Why this answer

The smartphone can connect to the Wi-Fi network (Layer 2 connectivity is fine) and other devices work, so the issue is specific to this device's higher-layer configuration. DNS resolution is required to translate domain names to IP addresses; if the smartphone's DNS settings point to a non-functional or incorrect server, it will fail to resolve any hostname, preventing internet access even though the network connection itself is active. This matches the symptom of being connected with full signal but unable to browse.

Exam trap

The 220-1201 exam often tests the distinction between Layer 2 connectivity (Wi-Fi association) and Layer 3/application-layer services (DNS, proxy), leading candidates to incorrectly blame the network infrastructure or hardware when the real problem is a device-specific configuration error.

How to eliminate wrong answers

Option B is wrong because if the corporate network were blocking the smartphone's MAC address, the device would not be able to connect to the Wi-Fi network at all, or it would be immediately disconnected; the question states it is connected with full signal. Option C is wrong because a faulty Wi-Fi adapter would typically cause intermittent disconnections, inability to see networks, or no connectivity at all, not a scenario where the device connects successfully but cannot access internet sites. Option D is wrong because if the corporate proxy server were down, all devices using that proxy would be affected, not just this one smartphone; the question specifies that other devices on the same network work fine.

Full explanation →
129
MCQmedium

A company deploys a new 802.11ac access point in a warehouse. After installation, workers report that their handheld scanners frequently disconnect when moving between aisles. The AP is mounted on a high ceiling. Which configuration change would most likely improve connectivity?

A.Change the AP to use only 2.4 GHz band.
B.Increase the AP's channel width to 80 MHz.
C.Enable WPA3 encryption on the network.
D.Reduce the AP's transmit power to avoid interference.
AnswerA

2.4 GHz has better range and can penetrate obstacles like warehouse racks more effectively, reducing disconnects.

Why this answer

The 5 GHz band used by 802.11ac has poorer penetration and range through obstacles like warehouse shelving and inventory. By switching to the 2.4 GHz band, signals diffract better around aisles and through racks, reducing disconnections for mobile scanners moving between aisles.

Exam trap

A common trap is to assume that 5 GHz always outperforms 2.4 GHz, but in warehouse environments with many obstacles, 2.4 GHz offers better range and penetration.

How to eliminate wrong answers

Option B is wrong because increasing channel width to 80 MHz (or 160 MHz) reduces the number of non-overlapping channels and increases susceptibility to interference, which would worsen connectivity in a dense warehouse environment. Option C is wrong because WPA3 encryption does not affect RF propagation or signal stability; it only improves security and has no impact on disconnections caused by range or obstacles. Option D is wrong because reducing transmit power would decrease the cell coverage area, making disconnections more likely as workers move between aisles, not less.

Full explanation →
130
MCQmedium

During a network upgrade, a technician installs a new 802.11ax (Wi-Fi 6) access point in a conference room. Users now report intermittent disconnections on their older laptops. What is the most likely cause?

A.The access point is overheating.
B.The channel width is set too wide for older clients.
C.The DNS server is misconfigured.
D.The power over Ethernet (PoE) injector is faulty.
AnswerB

Modern Wi-Fi standards, such as 802.11ac and 802.11ax, utilize wider channel widths (e.g., 80 MHz or 160 MHz) to achieve significantly higher data throughput. Older Wi-Fi clients, often based on 802.11n or earlier, may only support narrower channels (20 MHz or 40 MHz). If the new access point is configured to exclusively use a wider channel that older clients cannot properly interpret or negotiate, these legacy devices will experience intermittent disconnections or an inability to connect, while newer, compatible devices operate normally.

Why this answer

Older Wi-Fi clients that do not support 802.11ax may struggle with wide channel widths (e.g., 80 MHz or 160 MHz) because their radios are designed for narrower channels and may not properly interpret or coexist with the wider transmissions. This can cause intermittent disconnections as the AP and client negotiate incompatible channel settings. Reducing the channel width to 20 or 40 MHz typically restores stability for legacy clients.

Exam trap

220-1201 often tests the misconception that newer Wi-Fi standards are always fully compatible with older clients, ignoring the impact of channel width and other radio settings on legacy devices.

How to eliminate wrong answers

Option A is wrong because overheating would affect all clients and typically cause the AP to shut down or reboot, not just intermittent disconnections on older laptops. Option C is wrong because a DNS misconfiguration would cause name resolution failures (e.g., unable to reach websites by name) but would not cause Wi-Fi link disconnections. Option D is wrong because a faulty PoE injector would prevent the AP from powering on or cause it to cycle power, affecting all clients, not just older ones.

Full explanation →
131
MCQeasy

A customer reports that their laser printer is producing pages with faint, streaky text and occasional blank spots. The toner cartridge is new, and the printer's maintenance kit was replaced last month. Which component should be inspected next?

A.Fuser assembly
B.Imaging drum
C.Transfer roller
D.Pickup rollers
AnswerB

The imaging drum, or photoconductive drum, is crucial for forming the electrostatic latent image that attracts toner particles. As the drum rotates, a laser writes the image onto its surface, which then picks up toner. Wear, scratches, or damage to the drum's sensitive surface can prevent proper charge retention or toner attraction, resulting in consistent faint areas, streaks, or distinct blank spots on the printed page, even if the toner cartridge is new.

Why this answer

The imaging drum is the correct component to inspect because faint, streaky text with blank spots on a laser printer typically indicates a worn or damaged drum surface that cannot hold a uniform electrostatic charge to attract toner. Since the toner cartridge is new and the maintenance kit was recently replaced, the drum (often a separate consumable) is the next likely culprit.

Exam trap

220-1201 often tests the confusion between print-quality symptoms and their causes — candidates must distinguish drum-related streaking/blank spots from fuser-related smearing/ghosting and transfer-roller-related light prints.

How to eliminate wrong answers

Option A is wrong because a failing fuser usually causes smearing, toner not bonding to the page, or repeated ghost images — not faint streaky text with blank spots. Option C is wrong because a faulty transfer roller causes toner to not transfer properly from the drum to the paper, often producing overall light prints or toner scatter, but not the characteristic streaking pattern of a bad drum. Option D is wrong because pickup rollers affect paper feeding (jams, misfeeds, multiple sheets), not print quality.

Full explanation →
132
MCQmedium

You are deploying a new VoIP phone and need to ensure the Ethernet cable from the wall jack to the phone is properly terminated and has no shorts. The cable appears to be wired correctly but you want to confirm. Which tool should you use?

A.Toner probe
B.Loopback plug
C.Cable tester
D.Multimeter
AnswerC

A dedicated cable tester is the appropriate tool for verifying the physical integrity and proper wiring of an Ethernet cable, which is critical for VoIP deployment. It can perform comprehensive tests, including checking for pin-to-pin continuity across all eight conductors, identifying open circuits, detecting short circuits between wires, and confirming the correct wiring scheme (e.g., T568A or T568B) and proper termination at both ends. This ensures the cable meets the necessary electrical and data transmission standards for reliable VoIP phone operation.

Why this answer

A cable tester verifies continuity, pin-to-pin wiring, and detects shorts or opens in an Ethernet cable. Since the question states the cable appears correctly wired but you need to confirm proper termination and absence of shorts, the cable tester is the correct tool for this passive copper cable validation.

Exam trap

CompTIA A+ often tests the distinction between a cable tester (for wiring integrity) and a multimeter (for electrical measurements), leading candidates to incorrectly choose the multimeter because they think of 'shorts' as a purely electrical issue, but Ethernet requires pair-wise testing that a multimeter cannot perform.

How to eliminate wrong answers

Option A is wrong because a toner probe is used to trace and identify a specific cable within a bundle or patch panel, not to test for shorts or verify termination correctness. Option B is wrong because a loopback plug is used to test a network interface by sending signals back to the device, not to check the integrity or wiring of a cable itself. Option D is wrong because a multimeter can measure continuity and resistance but cannot verify Ethernet pin-to-pin wiring standards (e.g., T568A/B) or detect split pairs, which are critical for proper VoIP phone operation.

Full explanation →
133
MCQeasy

During a site survey for a new branch office, you measure signal strength in the conference room and find it is -85 dBm. The client devices require at least -67 dBm for reliable video conferencing. Which action is most appropriate?

A.Increase the transmit power of the existing access point to maximum.
B.Replace the client devices with ones that have better antennas.
C.Install an additional access point in the conference room ceiling.
D.Change the channel on the existing AP to a less congested one.
AnswerC

Installing an additional access point (AP) directly within the conference room, particularly in the ceiling, is the most effective solution for ensuring robust Wi-Fi coverage and achieving the required -67 dBm signal strength for high-bandwidth applications like video conferencing. This strategy creates a dedicated coverage cell, minimizing signal attenuation from walls and obstructions, and directly addresses the localized weak signal issue by bringing the signal source closer to the client devices. Proper placement in the ceiling also optimizes signal propagation and reduces potential interference.

Why this answer

The measured signal strength of -85 dBm is well below the -67 dBm threshold required for reliable video conferencing. Installing an additional access point in the conference room ceiling is the most appropriate action because it reduces the distance and obstacles between the client devices and the AP, directly improving the received signal strength (RSSI) to meet the application's requirements. Simply increasing transmit power on the existing AP may cause co-channel interference and may not overcome path loss from distance or obstructions, while changing channels or replacing client antennas does not address the fundamental lack of signal coverage.

Exam trap

A common mistake is to think that increasing transmit power or changing channels can fix a weak signal problem. The correct solution for inadequate RSSI is to add more APs to reduce distance and path loss.

How to eliminate wrong answers

Option A is wrong because increasing transmit power to maximum can cause excessive co-channel interference, violate regulatory EIRP limits, and may not sufficiently improve signal at the client due to asymmetric link budgets or fixed client transmit power. Option B is wrong because replacing client devices with better antennas is impractical, costly, and does not address the root cause of insufficient AP coverage in the conference room; client antennas are often internal and not user-replaceable. Option D is wrong because changing to a less congested channel may reduce interference but does not increase the signal strength from -85 dBm to the required -67 dBm; the issue is inadequate coverage, not channel contention.

Full explanation →
134
MCQmedium

A technician is troubleshooting a VM that cannot connect to the internet. The host has a single NIC and uses a Type 2 hypervisor. The VM's virtual switch is set to 'NAT'. Other VMs on the same host can access the internet. What is the most likely reason for the connectivity issue?

A.The virtual switch is set to 'Internal'
B.The VM's IP address is configured as static and does not match the NAT subnet
C.The host's firewall is blocking all outbound traffic
D.The hypervisor needs to be reinstalled
AnswerB

When a virtual switch utilizes Network Address Translation (NAT), it typically operates within a specific private IP subnet and acts as the gateway, often assigning addresses via DHCP. If a virtual machine is manually configured with a static IP address that falls outside of this designated NAT subnet range, it will be unable to locate or communicate with the NAT gateway. This misconfiguration directly prevents the VM from accessing the internet or any external network resources, explaining the isolated connectivity failure.

Why this answer

With a NAT-configured virtual switch, the VM must obtain an IP address from the hypervisor's NAT DHCP scope (e.g., VMware's VMnet8 subnet). If the VM has a static IP outside that subnet, it cannot route through the NAT gateway to the internet, even though other VMs using DHCP work fine. The symptom — one VM failing while peers succeed — points to a per-VM IP misconfiguration rather than a host-wide issue.

Exam trap

220-1201 often tests whether candidates blame host-wide causes (firewall, hypervisor reinstall) when the evidence — other VMs working — clearly isolates the fault to a single VM's IP configuration.

How to eliminate wrong answers

Option A is wrong because the question states the virtual switch is set to NAT, not Internal; Internal would isolate the VM from the host and internet entirely, but that contradicts the stated configuration. Option C is wrong because a host firewall blocking all outbound traffic would affect every VM on the host, not just one. Option D is wrong because reinstalling the hypervisor is a drastic, unsupported conclusion when other VMs on the same host have working internet access.

Full explanation →
135
MCQmedium

A user complains that their laptop frequently disconnects from the Wi-Fi when they move to a different room, but other devices in that room work fine. The technician checks the laptop's wireless adapter settings. Which configuration is most likely causing the issue?

A.The SSID is hidden
B.The wireless mode is set to 802.11a only
C.Power saving mode is enabled on the wireless adapter
D.The channel width is set to 40 MHz
AnswerC

When power saving mode is active on a laptop's wireless adapter, the adapter may periodically reduce its power output, enter a low-power state, or even briefly disable its radio to conserve battery life. This behavior is often triggered or exacerbated by fluctuating signal strength, such as when a user moves between rooms and the signal quality changes. The adapter might drop the connection as it attempts to save power, then struggle to re-establish it, leading directly to the observed intermittent disconnections.

Why this answer

Power saving mode on the wireless adapter reduces power consumption by periodically turning off the radio, which can cause intermittent disconnections when the laptop moves between rooms and the signal strength fluctuates. This is a common issue because the adapter may not maintain a stable connection as it transitions between access points or renegotiates power-saving states.

Exam trap

Candidates may mistakenly attribute the issue to signal range or channel interference (options B or D), but the key clue is that other devices work fine in the same room, pointing to a laptop-specific configuration like power saving mode.

How to eliminate wrong answers

Option A is wrong because a hidden SSID does not cause disconnections when moving rooms; it only prevents the network name from being broadcast, requiring manual entry to connect. Option B is wrong because 802.11a operates on the 5 GHz band, which has shorter range and poorer wall penetration than 2.4 GHz, but the issue is disconnections in other rooms where other devices work fine, indicating the problem is adapter-specific, not band-related. Option D is wrong because a 40 MHz channel width can cause interference or compatibility issues, but it would affect all devices on the same network, not just the laptop, and would not cause disconnections only when moving rooms.

Full explanation →
136
MCQhard

A company is upgrading its network to support 10 Gbps speeds for a server farm. The existing cabling is Cat6a, and the switches are Gigabit. The IT manager wants to minimize cost while achieving 10 Gbps. Which hardware change is required?

A.Replace the Cat6a cabling with Cat7 cabling.
B.Install 10 Gbps switches and use the existing Cat6a cabling.
C.Replace the switches with Gigabit models that have SFP+ ports for fiber.
D.Add a repeater to boost the signal on the existing Cat6a cabling.
AnswerB

Cat6a cabling already supports 10GBASE-T at 100 metres, so only the switches need replacing. Upgrading the switches to 10 Gbps while retaining the existing Cat6a satisfies the 10 Gbps requirement at minimum cost, avoiding unnecessary recabling.

Why this answer

Cat6a cabling is rated to support 10 Gbps Ethernet up to 100 meters, so no cable replacement is needed. The bottleneck is the existing Gigabit switches, which must be upgraded to 10 Gbps switches to achieve the desired speed. This is the most cost-effective approach because it avoids the expense of new cabling.

Exam trap

Students often think a higher category cable (e.g., Cat7) is needed for 10 Gbps, but Cat6a supports it. The real bottleneck is the switch hardware, not the cabling.

How to eliminate wrong answers

Option A is wrong because Cat6a already supports 10 Gbps at distances up to 100 meters, making an upgrade to Cat7 unnecessary and more expensive. Option C is wrong because replacing switches with Gigabit models (even with SFP+ ports) would still limit the network to 1 Gbps unless fiber SFPs and transceivers are used, and the question specifies minimizing cost while achieving 10 Gbps over existing copper cabling. Option D is wrong because repeaters are not used for signal boosting in Ethernet networks; they would introduce latency and are not a standard solution for 10 Gbps over Cat6a, which already meets the required signal integrity.

Full explanation →
137
MCQeasy

A user configures their laptop to use a static IP address, subnet mask, and default gateway. They can ping other devices on the same subnet but cannot reach the internet. What network service is most likely missing from their configuration?

A.DHCP server
B.DNS server
C.NAT
D.Proxy server
AnswerB

The Domain Name System (DNS) server is essential for translating human-readable domain names (like google.com) into numerical IP addresses that computers use to locate resources on the internet. Even if a laptop has a correctly configured static IP address, subnet mask, and default gateway, it cannot establish connections to websites or other internet services by name without a functional DNS server address. This inability to resolve names effectively prevents "internet access" as users perceive it, despite underlying network connectivity.

Why this answer

A static IP configuration includes the IP address, subnet mask, and default gateway, but if the DNS server address is not manually set, the laptop cannot resolve domain names to IP addresses. Since the user can ping devices on the same subnet (local connectivity works) but cannot reach the internet, the missing DNS server prevents name resolution for external hosts, even though routing via the default gateway is functional.

Exam trap

The trap here is that candidates assume internet access requires DHCP or NAT on the client, but the question explicitly states a static IP is configured, so the missing piece is the DNS server address, which is essential for name resolution but not for IP-level connectivity.

How to eliminate wrong answers

Option A is wrong because a DHCP server is not required for static IP configurations; the user manually set the IP, subnet mask, and gateway, so DHCP is irrelevant. Option C is wrong because NAT is a router function that translates private IPs to public IPs; it is not configured on the client laptop and is not a service the user would set in their TCP/IP settings. Option D is wrong because a proxy server is an intermediary for HTTP/HTTPS traffic, not a fundamental requirement for basic internet connectivity; the issue is name resolution, not proxy configuration.

Full explanation →
138
MCQmedium

A technician is tasked with enabling virtualization on a desktop to run a hypervisor. After enabling the feature in the OS, the hypervisor still reports that virtualization is disabled. What should be checked in the firmware?

A.Enable Secure Boot
B.Enable Intel VT-x or AMD-V in the BIOS/UEFI
C.Disable Hyper-Threading
D.Update the chipset drivers
AnswerB

Intel VT-x (Virtualization Technology for x86) and AMD-V (AMD Virtualization) are specific CPU hardware extensions that provide direct support for virtualization. These features create a more efficient and secure environment for hypervisors by allowing them to run guest operating systems with near-native performance and direct access to hardware resources. Access to these critical hardware capabilities is controlled at the firmware level, meaning they must be explicitly enabled within the system's BIOS or UEFI settings before any hypervisor can utilize them. Without these extensions active, software-based virtualization might be possible but will lack performance and advanced features.

Why this answer

Even after enabling virtualization in the OS, the hypervisor reports it is disabled because hardware-assisted virtualization (Intel VT-x or AMD-V) must be enabled in the BIOS/UEFI firmware. The OS setting only allows the hypervisor to use the feature; the CPU feature itself is gated by firmware. Enabling Intel VT-x or AMD-V in BIOS/UEFI is therefore the correct next step.

Exam trap

The trap is that candidates assume the OS-level virtualization checkbox is sufficient, forgetting that firmware must expose VT-x/AMD-V before any hypervisor can use it.

How to eliminate wrong answers

Option A is wrong because Secure Boot is a UEFI security feature that verifies bootloader signatures; it has no bearing on whether the CPU exposes VT-x/AMD-V to the hypervisor and can even complicate some hypervisor setups. Option C is wrong because Hyper-Threading is an SMT feature that presents logical cores to the OS; disabling it reduces performance but does not enable or disable virtualization extensions. Option D is wrong because chipset drivers are OS-level software that affect device communication, not the firmware-level CPU virtualization flag the hypervisor is checking.

Full explanation →
139
MCQhard

A user reports that their smartphone's screen is flickering and has vertical lines. The phone has not been dropped or exposed to water. Which of the following is the most likely cause of this issue?

A.A software glitch caused by a recent app update
B.The battery is swelling and pressing against the display
C.The display cable is loose or damaged
D.The phone's processor is overheating
AnswerC

A loose or damaged display cable is a common cause of screen flickering and vertical lines because it directly transmits the video signals and power to the display panel. Intermittent or corrupted data transmission due to a poor connection or physical damage to the cable's conductors results in the display receiving incomplete or garbled information, manifesting as visual anomalies like flickering, color distortion, or persistent lines on the screen.

Why this answer

Screen flickering and vertical lines are classic symptoms of a failing display or a loose internal display cable. Since there was no physical trauma, a loose connection or a manufacturing defect in the display assembly is the most probable cause.

Full explanation →
140
MCQeasy

A small office with 15 employees uses a single switch to connect all workstations. Users report that the network becomes extremely slow during peak hours, and some packets are being dropped. The switch is a 10/100 model with a 1 Gbps uplink to the router. What is the most likely cause of the slowdown?

A.The switch is not a managed switch and cannot prioritize traffic.
B.The switch's ports are only 100 Mbps, causing a bottleneck when multiple users are active.
C.The router's uplink port is faulty and needs to be replaced.
D.The switch is a hub, not a switch, causing collisions.
AnswerB

A switch with 100 Mbps (Fast Ethernet) ports limits the maximum data transfer rate for each connected device to 100 megabits per second. With 15 active users simultaneously accessing network resources, the aggregate demand can easily exceed the capacity of individual 100 Mbps links, especially if multiple users are transferring large files or streaming data. This saturation creates a significant bottleneck, leading to noticeable slowdowns, increased latency, and potential packet loss as the switch struggles to process the overwhelming traffic volume.

Why this answer

The switch operates at 10/100 Mbps per port, meaning each workstation is limited to a maximum of 100 Mbps. With 15 employees active during peak hours, the aggregate traffic can easily exceed the 100 Mbps per-port capacity, causing congestion, packet drops, and slowdowns. The 1 Gbps uplink to the router is not the bottleneck; the bottleneck is the 100 Mbps access ports connecting the workstations.

Exam trap

The 220-1201 exam often tests the misconception that a slow network during peak hours is always due to a lack of QoS or a faulty uplink, rather than the simple bandwidth limitation of 100 Mbps ports being saturated by multiple users.

How to eliminate wrong answers

Option A is wrong because while a managed switch can prioritize traffic (e.g., using QoS), the core issue here is insufficient bandwidth per port, not a lack of traffic prioritization; even with QoS, the 100 Mbps port speed would still be saturated. Option C is wrong because the router's uplink port is 1 Gbps, which is more than sufficient for 15 users, and there is no evidence of a faulty port (e.g., CRC errors, link flapping). Option D is wrong because the device is explicitly described as a switch, not a hub; switches create separate collision domains per port, eliminating collisions, whereas hubs share a single collision domain.

Full explanation →
141
MCQhard

A network engineer is designing a subnet scheme for a company with three departments: Sales (50 devices), HR (20 devices), and IT (10 devices). The company uses the 10.0.0.0/24 network. To minimize waste, the engineer decides to use variable-length subnet masking (VLSM). Which of the following subnet masks should be assigned to the Sales department?

A.255.255.255.128
B.255.255.255.192
C.255.255.255.224
D.255.255.255.240
AnswerB

The subnet mask 255.255.255.192 corresponds to a /26 CIDR, which designates 6 host bits. This configuration provides 2^6 = 64 total IP addresses within the subnet. Subtracting the network and broadcast addresses leaves 62 usable host addresses, which perfectly accommodates the requirement for 50 devices with minimal address waste, making it the most efficient choice.

Why this answer

The Sales department requires 50 hosts. A /26 subnet mask (255.255.255.192) provides 62 usable addresses (2^(32-26)-2 = 62), which is the smallest subnet that can accommodate 50 devices without waste. VLSM allows using this mask within the 10.0.0.0/24 network, leaving room for other subnets.

Exam trap

The 220-1201 exam often tests the candidate's ability to calculate the exact number of usable hosts per subnet (2^(32-prefix)-2) and match it to the requirement, tricking those who forget to subtract the network and broadcast addresses or who round up to the nearest power of two without considering the -2.

How to eliminate wrong answers

Option A (255.255.255.128) is wrong because it provides 126 usable addresses, which is far more than the 50 needed, resulting in significant waste and violating the VLSM goal of minimizing waste. Option C (255.255.255.224) is wrong because it provides only 30 usable addresses (2^5-2 = 30), which is insufficient for 50 devices. Option D (255.255.255.240) is wrong because it provides only 14 usable addresses (2^4-2 = 14), far too few for the Sales department.

Full explanation →
142
MCQmedium

A company is setting up a new branch office with 30 employees. They need to connect all workstations to the network and provide internet access. The internet connection is a fiber optic line terminating in an ONT. Which device should be placed between the ONT and the switch to route traffic and provide NAT?

A.Patch panel
B.Router
C.Layer 2 switch
D.Firewall appliance
AnswerB

A router is essential for connecting a local area network (LAN) to a wide area network (WAN), such as the internet, typically interfacing with an Optical Network Terminal (ONT) or modem. It performs Network Address Translation (NAT) to allow multiple internal devices to share a single public IP address and intelligently routes data packets between different IP networks based on their destination addresses. This device is crucial for establishing internet connectivity and managing traffic flow between the internal network and external resources.

Why this answer

The ONT converts fiber to Ethernet, but it does not route or perform NAT. A router is required to connect the local network to the internet, provide NAT, and handle IP addressing. A switch alone cannot route, and a firewall is often combined with a router but is not the primary device for routing.

The correct answer is a router.

Full explanation →
143
MCQeasy

A user reports that their new Bluetooth headset pairs with their smartphone but no audio is heard during calls. The headset works fine with another phone. What is the most likely cause?

A.The headset battery is low.
B.The phone is not using the correct Bluetooth profile for calls.
C.The headset is out of Bluetooth range.
D.The phone's Bluetooth radio is faulty.
AnswerB

Bluetooth headsets often utilize distinct profiles for different functions, such as A2DP (Advanced Audio Distribution Profile) for high-quality stereo music streaming and HSP/HFP (Headset Profile/Hands-Free Profile) for monaural audio during phone calls. If the phone successfully connects for media but fails to activate or switch to the appropriate HSP/HFP profile when a call is initiated, call audio will not be routed to the headset, even if the headset is otherwise connected. This scenario precisely explains why media might play but calls have no audio.

Why this answer

The most likely cause is that the phone is not using the correct Bluetooth profile for calls. Bluetooth headsets require the Hands-Free Profile (HFP) or Headset Profile (HSP) for bidirectional audio during calls. If the phone defaults to the Advanced Audio Distribution Profile (A2DP) for media streaming instead, audio will not route through the headset for calls.

Since the headset works with another phone, the issue is specific to the phone's profile selection or configuration.

Exam trap

The 220-1201 exam often tests the distinction between Bluetooth profiles (HFP/HSP vs. A2DP) to trap candidates who assume that successful pairing guarantees all audio functions will work.

How to eliminate wrong answers

Option A is wrong because a low battery would typically cause intermittent audio, pairing failures, or no power at all, not a scenario where the headset pairs successfully but produces no audio during calls. Option C is wrong because Bluetooth range is approximately 10 meters (33 feet) for Class 2 devices; if the headset is paired and within range, range would not cause a complete lack of audio only during calls while media works. Option D is wrong because a faulty Bluetooth radio would likely cause pairing failures, frequent disconnections, or no audio across all functions, not a selective issue where the headset pairs and works for media but fails only during calls.

Full explanation →
144
MCQmedium

During a site survey, a technician needs to measure the signal strength of a wireless access point from various locations in an office to ensure adequate coverage. Which tool should be used for this task?

A.Multimeter
B.Wi-Fi analyzer
C.Spectrum analyzer
D.Cable tester
AnswerB

A Wi-Fi analyzer reports received signal strength (RSSI) and signal-to-noise ratio per access point at each surveyed location, letting the technician map coverage gaps and dead zones. It measures the actual RF environment rather than inferring it from link speed.

Why this answer

A Wi-Fi analyzer is the correct tool because it is specifically designed to measure wireless signal strength (RSSI), channel utilization, and interference from access points. During a site survey, the technician uses a Wi-Fi analyzer to collect real-time signal data from various locations, ensuring adequate coverage and identifying dead zones or co-channel interference.

Exam trap

In CompTIA A+ exams, candidates often confuse Wi-Fi analyzers with spectrum analyzers. A Wi-Fi analyzer measures signal strength from access points for coverage surveys, while a spectrum analyzer detects RF interference and noise.

How to eliminate wrong answers

Option A is wrong because a multimeter measures electrical properties like voltage, current, and resistance, not wireless RF signal strength. Option C is wrong because a spectrum analyzer measures RF energy across a frequency spectrum to detect interference sources, but it does not decode Wi-Fi frames or provide per-AP signal strength readings needed for a coverage survey. Option D is wrong because a cable tester verifies the physical integrity and wiring of Ethernet cables (e.g., continuity, shorts, or opens), not wireless signal propagation.

Full explanation →
145
MCQmedium

A user wants to use a wired headset with their tablet for voice calls, but the tablet only has a single USB-C port and no 3.5mm jack. The headset has a 3.5mm plug. Which accessory should you recommend?

A.A USB-C hub with multiple ports.
B.A Bluetooth audio adapter for the headset.
C.A USB-C to 3.5mm adapter.
D.A 3.5mm Y-splitter cable.
AnswerC

Many modern tablets and smartphones have eliminated the dedicated 3.5mm audio jack, relying on the versatile USB-C port for both data and audio transmission. A USB-C to 3.5mm adapter contains a digital-to-analog converter (DAC) that translates the digital audio signal from the USB-C port into an analog signal compatible with a standard 3.5mm wired headset. This adapter directly plugs into the tablet's USB-C port and provides the necessary 3.5mm jack, thereby fulfilling the user's requirement for a wired audio connection.

Why this answer

A USB-C to 3.5mm adapter converts the digital audio signal from the USB-C port into an analog signal that the wired headset can use. This adapter typically includes a built-in DAC (Digital-to-Analog Converter) to handle the conversion, enabling voice calls through the tablet's USB-C port without requiring additional power or Bluetooth pairing.

Exam trap

CompTIA A+ often tests the misconception that a USB-C hub (Option A) is a universal solution for all port shortages, but candidates must recognize that audio output requires a specific adapter with a DAC, not just any hub.

How to eliminate wrong answers

Option A is wrong because a USB-C hub with multiple ports provides additional connectivity (e.g., HDMI, USB-A, Ethernet) but does not inherently include a 3.5mm audio jack; unless the hub specifically has an audio output, it will not solve the headset connection issue. Option B is wrong because a Bluetooth audio adapter would convert the wired headset into a wireless device, which is unnecessary and introduces latency, pairing steps, and battery dependency when a simple wired adapter is sufficient. Option D is wrong because a 3.5mm Y-splitter cable is designed to split a single 3.5mm jack into two (e.g., for separate microphone and headphone plugs) but does not convert USB-C to 3.5mm; the tablet lacks a 3.5mm port entirely, so the splitter has no source to connect to.

Full explanation →
146
MCQmedium

A user wants to access their company's webmail using a secure connection from a public Wi-Fi hotspot. The webmail server is configured to use IMAP over SSL. Which port should the email client use?

A.143
B.110
C.993
D.995
AnswerC

Port 993 is the designated secure port for the Internet Message Access Protocol (IMAP) over SSL/TLS, often referred to as IMAPS. This port encrypts all communication between the email client (or webmail interface) and the mail server, protecting login credentials and message content from interception. For accessing company webmail securely, especially over potentially insecure networks, IMAPS on port 993 is the appropriate and recommended choice.

Why this answer

IMAP over SSL (IMAPS) uses TCP port 993 to establish an encrypted connection. Since the user is on a public Wi-Fi hotspot and the server is configured for IMAP over SSL, the email client must connect to port 993 to ensure all traffic is encrypted via TLS/SSL. Port 143 is the default for unencrypted IMAP, which would expose credentials and email data on an insecure network.

Exam trap

The CompTIA A+ exam often tests the distinction between default ports for encrypted vs. unencrypted protocols, and the trap here is that candidates confuse port 993 (IMAP over SSL) with port 995 (POP3 over SSL) or assume port 143 can be used with SSL without realizing it requires STARTTLS rather than implicit TLS.

How to eliminate wrong answers

Option A is wrong because port 143 is the default port for unencrypted IMAP, not IMAP over SSL; using it would send data in plaintext, which is insecure on a public Wi-Fi hotspot. Option B is wrong because port 110 is the default port for POP3 (unencrypted), not IMAP; POP3 is a different protocol for retrieving email, and it lacks encryption on this port. Option D is wrong because port 995 is the default port for POP3 over SSL (POP3S), not IMAP over SSL; it is used for encrypted POP3 connections, not IMAP.

Full explanation →
147
MCQmedium

A user reports intermittent network connectivity in an office that recently had a new ceiling installed. The network drop runs through the ceiling and is not in a conduit. What is the most likely cause of the intermittent connection?

A.The cable is too long for the network speed.
B.The cable is not properly terminated at the patch panel.
C.The cable is pinched or kinked by the new ceiling installation.
D.The network switch port is faulty.
AnswerC

Ceiling installers routinely staple or trap unshielded cable against joists and grid, crushing the pairs. That deformation changes impedance and causes intermittent contact, matching the reported symptoms; a clean cut would instead produce a permanent loss of link.

Why this answer

The new ceiling installation is the most likely cause because the network cable, running without conduit, can easily be pinched or kinked by ceiling tiles, support wires, or other hardware. Physical damage like a pinch or kink can cause impedance mismatches, signal reflection, or even a short, leading to intermittent connectivity. This is a classic physical-layer issue where the cable's integrity is compromised by environmental changes.

Exam trap

CompTIA A+ emphasizes the importance of physical layer issues. The new ceiling installation can easily pinch or kink the cable, causing impedance mismatches and intermittent connectivity. Candidates may overlook environmental changes and instead incorrectly blame termination or switch hardware.

How to eliminate wrong answers

Option A is wrong because cable length limits (e.g., 100 meters for Ethernet over twisted pair) are a constant factor; if the cable were too long, the issue would be persistent, not intermittent, and the recent ceiling work would not affect length. Option B is wrong because improper termination at the patch panel typically causes a permanent fault (e.g., no link or continuous errors), not intermittent connectivity that coincides with the ceiling installation. Option D is wrong because a faulty switch port usually causes consistent failure or errors on that specific port, and the timing with the ceiling work makes a physical cable issue far more probable than a coincidental hardware failure.

Full explanation →
148
MCQhard

A technician is troubleshooting a laptop that powers on but displays a black screen with no boot activity. The technician hears the fan spinning and sees the power LED is on. Which of the following steps should the technician perform next to isolate the issue?

A.Reseat the RAM modules
B.Replace the LCD panel
C.Connect an external monitor
D.Reinstall the operating system
AnswerC

Connecting an external monitor is the most logical and least invasive initial troubleshooting step when a laptop powers on but shows no display. This action quickly determines if the laptop's graphics processing unit (GPU) is functioning and successfully outputting a video signal. If the external monitor displays an image, it definitively isolates the problem to the laptop's internal LCD panel, its connecting cable, or the inverter, rather than the core video output circuitry or motherboard.

Why this answer

Connecting an external monitor is the next step to isolate whether the issue is with the laptop's display or the internal hardware. If the external monitor displays properly, the problem is likely the laptop's LCD panel or cable; if not, the issue is with the motherboard, RAM, or other internal components. This is a non-invasive diagnostic step.

Exam trap

220-1201 often tests troubleshooting methodology, and candidates may jump to replacing hardware (like LCD panel) before performing simple isolation steps like connecting an external monitor.

How to eliminate wrong answers

Option A is wrong because reseating RAM is a more invasive step and should be done after checking external display, as RAM issues often cause no POST or beep codes, but the laptop shows power and fan, so display isolation is first. Option B is wrong because replacing the LCD panel is premature without confirming the panel is faulty; the external monitor test will indicate if the panel is the issue. Option D is wrong because reinstalling the OS is unnecessary for a black screen with no boot activity; the issue is likely hardware, not software.

Full explanation →
149
MCQeasy

A user reports that their laser printer is producing pages with vertical black streaks. The streaks appear consistently in the same location on every page. Which printer component is most likely causing this issue?

A.Fuser assembly
B.Toner cartridge
C.Drum unit
D.Pickup roller
AnswerC

The drum unit, or photoconductive drum, is the central component responsible for forming the electrostatic image and attracting toner. If the delicate photosensitive surface of the drum is scratched, worn, or has a foreign particle adhering to it, that specific defect will consistently pick up or repel toner in the same location during each rotation. This consistent defect is then transferred to the paper, manifesting as a persistent vertical streak or line down every printed page.

Why this answer

Vertical black streaks that appear in the same location on every page are typically caused by a scratched or contaminated drum unit. The drum transfers toner to the paper, and any damage or debris on its surface creates a repeating mark at the corresponding position on each page.

Exam trap

220-1201 often tests the ability to distinguish between drum, toner, and fuser symptoms; candidates may incorrectly blame the toner cartridge for vertical streaks when the drum is the actual cause.

How to eliminate wrong answers

Option A is wrong because a faulty fuser usually causes smearing, poor toner adhesion, or horizontal artifacts, not consistent vertical streaks. Option B is wrong because a toner cartridge issue more often produces light prints, horizontal lines, or random speckling, though a damaged toner roller could contribute, the drum is the primary suspect for repeating vertical streaks. Option D is wrong because a pickup roller problem causes paper feed issues such as jams or misfeeds, not print quality streaks.

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150
MCQhard

A technician is configuring an MFP for a healthcare clinic that must comply with HIPAA. The MFP has a built-in hard drive that stores scanned documents. The clinic wants to ensure that once a document is scanned and transmitted, it cannot be recovered from the MFP's drive. What feature should the technician enable?

A.User authentication with PIN
B.Secure print release
C.Hard drive encryption
D.Secure erase after transmission
AnswerD

Secure erase after transmission involves overwriting the specific sectors on the MFP's hard drive where sensitive scanned data was temporarily stored, typically multiple times with specific patterns (e.g., zeros, ones, or random data). This process ensures that the original data becomes forensically unrecoverable, even with advanced data recovery tools. This method is crucial for compliance with regulations like HIPAA, as it guarantees the permanent removal of Protected Health Information (PHI) from the device's storage after it has been successfully transmitted.

Why this answer

Secure erase (or data overwrite) is a feature that overwrites the hard drive with patterns of data to prevent recovery. This is critical for compliance in environments like healthcare where patient data must be protected after use.

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