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CompTIA A+ Core 1 220-1201 (220-1201) — Questions 676–750

1020 questions total · 14pages · All types, answers revealed

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676

MCQhard

A technician is migrating a database from an on-premises server to a cloud platform. The database contains sensitive customer information. The company requires that data be encrypted both at rest and in transit. Which combination of technologies should the technician implement?

A.TLS for in transit and AES-256 for at rest

B.SSL for at rest and IPsec for in transit

C.VPN for in transit and hashing for at rest

D.SSH tunneling for at rest and TLS for in transit

AnswerA

TLS secures data during transmission, and AES-256 (via cloud provider encryption) secures stored data, meeting both requirements.

Why this answer

For data in transit, TLS/SSL encrypts communication between the application and the database. For data at rest, the cloud provider's encryption feature (e.g., AWS EBS encryption or Azure SQL TDE) encrypts the stored data. AES-256 is a common encryption standard for at-rest data, but it must be implemented by the provider's service.

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677

MCQmedium

A user complains that their PC emits a high-pitched whining noise when under load, and the noise stops when the system is idle. The noise is not coming from the case fans or CPU cooler. What component is most likely failing?

A.The power supply's internal fan bearing

B.The power supply's coils are vibrating due to electrical load

C.The GPU fan is hitting a wire

D.The hard drive is failing mechanically

AnswerB

Coil whine is caused by electromagnetic vibration in the PSU's inductors when under load, producing a high-pitched sound.

Why this answer

Coil whine from the power supply's inductors or transformers is common under load and can be audible. It is not typically a sign of immediate failure but can indicate a low-quality PSU. Fans and coolers produce different sounds.

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678

MCQmedium

A technician is configuring a dual-monitor setup for a stock trader. The primary monitor is a 27-inch 1440p display connected via DisplayPort, and the secondary is a 24-inch 1080p display connected via HDMI. The user notices that windows dragged to the secondary monitor appear stretched. What is the most likely cause?

A.The HDMI cable is not version 2.0 or higher

B.The secondary monitor's resolution is set to 1440p instead of 1080p

C.The graphics card cannot support two different resolutions

D.The secondary monitor is set to extend mode instead of duplicate

AnswerB

If the 1080p monitor is set to a higher resolution, the OS scales it, causing stretching.

Why this answer

When a 1080p monitor is configured to run at 1440p, the graphics card scales the image to fit the physical panel, but the pixel density mismatch causes stretching and blurriness. The secondary monitor's native resolution is 1920x1080, so setting it to 2560x1440 forces non-native scaling, distorting the image. This is the most common cause of stretched windows in a multi-monitor setup with different native resolutions.

Exam trap

CompTIA A+ often tests the misconception that HDMI cable version or graphics card limitations cause scaling issues, when the real culprit is a manual resolution override that mismatches the monitor's native resolution.

How to eliminate wrong answers

Option A is wrong because HDMI cable version does not affect image stretching; a non-2.0 cable might limit bandwidth for higher resolutions or refresh rates, but it would not cause stretching at 1080p. Option C is wrong because modern graphics cards easily support multiple different resolutions simultaneously via independent display pipelines (e.g., DisplayPort Multi-Stream Transport or separate TMDS links). Option D is wrong because extend mode is the correct configuration for independent desktop space; duplicate mode would mirror the primary monitor's resolution, which could also cause scaling issues, but the user's symptom of stretching specifically points to a resolution mismatch, not the display mode.

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679

MCQeasy

A user reports that their laptop can connect to the internet when using a wired connection at home, but cannot connect to any network resources when using Wi-Fi at the office. The office uses DHCP with a scope of 192.168.10.0/24. The laptop's IP configuration shows an address of 169.254.15.22. What is the most likely cause of this issue?

A.The laptop's Wi-Fi adapter is disabled in Device Manager.

B.The office DHCP server is out of available IP addresses.

C.The laptop cannot reach the DHCP server on the office network.

D.The laptop's DNS settings are misconfigured.

AnswerC

APIPA is assigned when a DHCP server is not reachable, so the laptop cannot obtain a valid IP. This is the most direct explanation.

Why this answer

The IP address 169.254.15.22 is an Automatic Private IP Addressing (APIPA) address (169.254.0.0/16), which Windows assigns when a DHCP client fails to receive a lease from a DHCP server. Since the laptop can connect via wired Ethernet at home but not via Wi-Fi at the office, the most likely cause is that the Wi-Fi adapter cannot communicate with the office DHCP server, preventing it from obtaining a valid 192.168.10.0/24 address.

Exam trap

The A+ exam often tests the distinction between a DHCP server that is unreachable versus one that is out of addresses; the trap here is that candidates may assume a depleted scope (Option B) is the cause, but the APIPA address specifically indicates the client never received any response, not that it received a NAK or no available lease.

How to eliminate wrong answers

Option A is wrong because if the Wi-Fi adapter were disabled in Device Manager, the laptop would not show any IP address for that interface, nor would it attempt DHCP; the presence of an APIPA address indicates the adapter is enabled and attempted DHCP. Option B is wrong because if the DHCP server were out of addresses, the server would typically send a DHCPNAK or no response, but the client would still attempt DHCP and might receive an APIPA address; however, the more direct and common cause for an APIPA address is the inability to reach the DHCP server at all, not just a depleted scope. Option D is wrong because DNS misconfiguration would not prevent the laptop from obtaining an IP address via DHCP; DNS is used for name resolution after an IP is assigned, and the APIPA address indicates the DHCP process itself failed.

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680

MCQmedium

A technician is configuring a tablet for a delivery driver who needs to navigate and take photos of packages. The driver complains the tablet's screen is hard to see in direct sunlight. Which accessory would best address this issue?

A.A high-brightness screen protector that boosts luminance.

B.A privacy screen filter to reduce viewing angles.

C.An anti-glare screen protector with a matte finish.

D.A sunshade hood that attaches to the tablet case.

AnswerC

This is correct; it reduces glare and improves outdoor visibility.

Why this answer

An anti-glare screen protector with a matte finish reduces reflections by scattering ambient light through a microscopic textured surface, which improves readability in direct sunlight without increasing the display's inherent brightness. This directly addresses the driver's issue of screen glare outdoors, whereas other options either fail to reduce glare or introduce impracticality for mobile use.

Exam trap

CompTIA often tests the misconception that a 'high-brightness' screen protector can increase luminance, when in fact no passive accessory can boost a display's brightness—only active solutions like a brighter backlight or an external powered shade can do so.

How to eliminate wrong answers

Option A is wrong because a high-brightness screen protector does not exist as a passive accessory; screen luminance is determined by the display's backlight, and a protector cannot boost it—it can only reduce light transmission, making the screen dimmer. Option B is wrong because a privacy screen filter narrows viewing angles to prevent side glances, but it does not reduce glare from sunlight and can actually worsen outdoor visibility by further dimming the screen. Option D is wrong because a sunshade hood, while effective in theory, is bulky, impractical for a delivery driver who needs to hold the tablet and take photos, and it does not address the screen's reflective surface itself.

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681

MCQhard

A technician is troubleshooting a laptop that cannot connect to a 5 GHz Wi-Fi network, but it connects to 2.4 GHz networks without issue. The laptop's Wi-Fi adapter supports both bands. What is the most likely cause?

A.The 5 GHz network is using a channel not supported by the laptop's Wi-Fi adapter.

B.The laptop is too far from the access point, or there are obstructions blocking the 5 GHz signal.

C.The laptop's Bluetooth is interfering with the 5 GHz Wi-Fi.

D.The 5 GHz network requires WPA3, which the laptop does not support.

AnswerB

5 GHz has poorer penetration and shorter range; distance or walls can prevent connection while 2.4 GHz still works.

Why this answer

The most likely cause is distance or obstructions because 5 GHz signals have higher attenuation and shorter range compared to 2.4 GHz. Since the laptop connects to 2.4 GHz but not 5 GHz, and the adapter supports both bands, the physical environment is the primary suspect — 5 GHz is more easily blocked by walls, furniture, or simply being too far from the access point.

Exam trap

The 220-1201 exam often tests the misconception that 5 GHz connectivity issues are always due to hardware incompatibility or configuration, when in reality the most common cause is the physical limitation of 5 GHz signal propagation — distance and obstructions.

How to eliminate wrong answers

Option A is wrong because if the laptop's Wi-Fi adapter supports 5 GHz, it typically supports all standard 5 GHz channels (36–165 in most regions), and channel incompatibility is rare unless the adapter is very old or the network uses DFS channels that the adapter might not support, but this is less common than signal attenuation. Option C is wrong because Bluetooth operates at 2.4 GHz, not 5 GHz, so it cannot directly interfere with 5 GHz Wi-Fi; Bluetooth interference is a 2.4 GHz issue. Option D is wrong because WPA3 is backward compatible with WPA2, and a laptop that supports 5 GHz but not WPA3 would still connect using WPA2 if the network allows mixed mode; most 5 GHz networks do not require WPA3 exclusively.

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682

MCQeasy

A company is deploying a new VoIP phone system. Each desk needs both a computer and a phone connected to the network. To minimize cabling, the phone will be connected to the wall jack, and the computer will connect to the phone. Which feature must the switch ports support to ensure both devices receive network access?

A.PoE (Power over Ethernet)

B.Port mirroring

C.VLAN tagging (802.1Q)

D.Link aggregation

AnswerC

VLAN tagging allows the switch port to carry multiple VLANs, separating voice and data traffic so both the phone and computer can communicate on their respective networks.

Why this answer

This scenario describes a typical VoIP deployment where the phone acts as a pass-through for the computer. The switch port must support VLAN tagging to separate voice and data traffic, but the key feature is Power over Ethernet (PoE) if the phone is powered by the switch. However, the question asks for both devices to receive network access, which is handled by the switch port's ability to carry multiple VLANs.

The correct answer is VLAN tagging (802.1Q) to separate voice and data traffic on the same port.

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683

MCQmedium

A user complains that their smartphone's battery drains quickly even when idle. You run diagnostics and find the battery health is at 82%. The device is two years old. Which hardware servicing action is most appropriate?

A.Replace the battery with a new OEM battery.

B.Calibrate the battery by fully draining and recharging.

C.Update the operating system to the latest version.

D.Disable all background apps and notifications.

AnswerA

At 82% health, the battery is degraded; replacement directly addresses the drain issue.

Why this answer

This question tests battery replacement thresholds. A battery health below 80-85% often indicates significant degradation, causing poor runtime. Replacing the battery restores normal battery life.

Software optimization may help but is secondary to hardware replacement.

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684

MCQeasy

A user reports that their Android smartphone's touchscreen is unresponsive after they dropped it in a puddle. The device powers on, but the display shows distorted colors and the touch input does not register at all. What is the most likely cause of this issue?

A.The device's battery is swollen and pressing against the display

B.The digitizer and LCD have been damaged by liquid ingress

C.The device's operating system has corrupted due to water exposure

D.The screen protector is trapping moisture and blocking touch input

AnswerB

Liquid can short-circuit the digitizer and LCD connectors, causing both touch failure and display artifacts. This matches the symptoms after water exposure.

Why this answer

Water damage can cause short circuits and corrosion on the display digitizer and LCD panel, leading to both touch unresponsiveness and visual distortion. Powering on a wet device often worsens the damage. The correct answer focuses on the digitizer and LCD failure due to liquid ingress.

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685

MCQmedium

A customer reports that their network printer is not accessible from any computer on the network. The printer is connected to a switch via Ethernet, and the switch port LED is blinking green. The technician pings the printer's IP address from a computer and gets no reply. What is the most likely cause?

A.The printer's Ethernet cable is faulty.

B.The printer has an IP address conflict with another device.

C.The switch port is administratively down.

D.The printer's print spooler service is stopped.

AnswerB

An IP address conflict can cause the printer to be unreachable even though the physical connection is good. The switch LED blinks because the printer is sending frames, but the IP stack may be disabled due to the conflict.

Why this answer

The blinking green LED on the switch port indicates a good physical connection and active link, ruling out a faulty cable or administratively down port. Since the printer is not responding to pings from any computer, the most likely cause is an IP address conflict, where another device on the network is using the same IP address, causing the printer to be unreachable. This conflict can occur due to static IP misconfiguration or a DHCP server assigning the same address to multiple devices.

Exam trap

The trap here is that candidates see a blinking green LED and assume the physical layer is fine, but then incorrectly attribute the ping failure to a faulty cable or port issue, overlooking the IP layer conflict that is the most common cause of unreachable devices with good link indicators.

How to eliminate wrong answers

Option A is wrong because a faulty Ethernet cable would typically cause the switch port LED to be off or show intermittent activity, not a steady blinking green, which indicates a valid link and traffic. Option C is wrong because an administratively down switch port would have the LED off or amber, not blinking green, and the technician would need to use 'show interfaces' to verify the port status. Option D is wrong because the print spooler service being stopped affects the printer's ability to process print jobs locally, but it does not prevent the printer from responding to ICMP pings or being reachable on the network layer.

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686

MCQeasy

A user complains that their computer randomly shuts down after about 30 minutes of gaming. The case feels warm to the touch, and all fans are spinning. Which component is most likely causing the shutdowns?

A.Failing hard drive

B.Insufficient RAM

C.Overheating CPU or GPU

D.Loose power cable

AnswerC

Thermal protection mechanisms shut down the system to prevent damage when components exceed safe temperatures.

Why this answer

Random shutdowns under load, especially with a warm case, strongly suggest overheating. The CPU or GPU thermal protection is triggering to prevent damage. Cleaning dust from heatsinks and fans, and ensuring proper airflow, is the first step.

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687

MCQeasy

A small business wants to connect two separate office buildings that are 150 meters apart, with no existing data cabling between them. They need a reliable, high-speed connection without running new cables. Which type of network should be implemented?

A.Personal Area Network (PAN)

B.Local Area Network (LAN)

C.Wide Area Network (WAN)

D.Metropolitan Area Network (MAN)

AnswerD

Correct. A Metropolitan Area Network (MAN) is designed for metropolitan-scale distances and can cover 150 meters using technologies like wireless bridges, providing reliable high-speed connectivity without new cables.

Why this answer

A Metropolitan Area Network (MAN) is the best choice because it is designed to connect networks over a metropolitan area, typically using technologies like fiber optics or wireless bridges. Since the buildings are 150 meters apart and no new cables can be run, a wireless bridge (a common MAN technology) provides a reliable, high-speed connection without cabling. WANs are intended for larger geographic areas, LANs are limited to a single building, and PANs are for personal device connections.

Exam trap

The common mistake is confusing WAN and MAN. While a WAN can connect remote sites, it is typically used for much larger distances and often requires carrier services. A MAN is the correct classification for connecting two nearby buildings across a short distance without new cables, often using a wireless bridge.

How to eliminate wrong answers

Option A is wrong because a Personal Area Network (PAN) is designed for connecting personal devices within a very short range (typically up to 10 meters using Bluetooth or USB), and cannot span 150 meters between buildings. Option B is wrong because a Local Area Network (LAN) is confined to a single building or campus and relies on direct cabling (e.g., Cat6a) which has a maximum segment length of 100 meters before signal degradation; 150 meters exceeds this limit without repeaters or switches. Option D is wrong because a Metropolitan Area Network (MAN) typically covers a larger geographic area (e.g., a city) and is usually implemented by service providers using technologies like fiber rings or WiMAX, which is overkill and not the standard solution for connecting just two nearby buildings without existing cabling.

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688

MCQeasy

A user wants to upgrade their laptop from a 500GB 5400 RPM HDD to a faster storage solution without increasing power consumption. Which drive type should you recommend?

A.Another 5400 RPM HDD with a larger cache

B.A 10,000 RPM HDD

C.A SATA solid-state drive (SSD)

D.An external USB flash drive

AnswerC

An SSD provides significantly faster read/write speeds and lower power consumption compared to any HDD, making it the best choice.

Why this answer

This question assesses understanding of storage drive characteristics. SSDs are faster, more durable, and consume less power than HDDs, making them ideal for laptop upgrades.

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689

MCQhard

A company's remote site connects to the main office via a site-to-site VPN. Recently, users at the remote site report that they can access internal servers at the main office but cannot reach the internet. The main office users have full internet access. What is the most likely cause?

A.The remote site's DNS server is down.

B.The VPN is configured as a full tunnel and the main office's internet link is down.

C.The remote site's firewall is blocking port 443.

D.The VPN encryption algorithm is mismatched.

AnswerB

Correct. Full tunnel sends all traffic through the main office; if that link fails, remote users lose internet.

Why this answer

This question tests advanced routing and VPN concepts. A split-tunnel configuration allows remote traffic to go directly to the internet, while a full-tunnel sends all traffic through the VPN. If the VPN is full-tunnel and the main office's internet gateway is misconfigured or down, remote users lose internet access.

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690

MCQhard

A technician is upgrading a workstation and notices that the new CPU is not listed in the motherboard's supported CPU list. The motherboard uses an LGA 1200 socket. What is the most likely issue?

A.The CPU is physically too large for the socket

B.The motherboard's chipset does not support that CPU generation

C.The CPU requires more power than the motherboard can provide

D.The CPU is a server-grade processor not meant for workstations

AnswerB

The chipset must be compatible with the CPU's generation; otherwise, the system may not boot or may be unstable.

Why this answer

CPU compatibility depends on both socket and chipset. Even with the correct socket, the chipset may not support the CPU's power delivery or microcode. This question tests deeper knowledge of motherboard-CPU compatibility beyond just the socket.

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691

MCQmedium

A user complains that their external hard drive is not showing up in File Explorer, but it appears in Device Manager as a connected device. What is the most likely issue?

A.The USB port is faulty.

B.The drive needs a new driver.

C.The drive does not have a drive letter assigned.

D.The file system is corrupted.

AnswerC

A missing drive letter is a common issue; it can be resolved by assigning one in Disk Management.

Why this answer

This question tests troubleshooting storage recognition issues. When a device appears in Device Manager but not File Explorer, it often means the drive lacks a drive letter or has a partition issue.

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692

MCQhard

A technician is setting up a thermal printer for a retail point-of-sale system that prints receipts. The printer uses direct thermal technology. After installation, the receipts are completely blank when printed. The printer feeds paper and makes printing sounds. What is the most likely cause?

A.The printer driver is not installed correctly.

B.The thermal paper is loaded upside down.

C.The printhead is dirty and needs cleaning.

D.The printer is set to 'thermal transfer' mode instead of 'direct thermal'.

AnswerB

Direct thermal paper must have the coated side facing the printhead; upside-down loading prevents image formation.

Why this answer

Direct thermal printers use heat-sensitive paper; if the paper is loaded upside down, the thermal coating does not contact the printhead, resulting in blank output. The printer still feeds paper and makes noise because the mechanism works, but no image is produced. Other issues like driver or connection problems would typically cause errors or no activity.

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693

MCQeasy

A user reports that their laptop can see several neighboring Wi-Fi networks but cannot see their own office's SSID, which is a 5 GHz-only network. Other users in the same office can connect without issue. What is the most likely cause?

A.The router's SSID broadcast is disabled.

B.The laptop's wireless adapter is set to airplane mode.

C.The laptop only supports 2.4 GHz Wi-Fi.

D.The office router is using WPA3 encryption.

AnswerC

If the adapter lacks 5 GHz capability, it cannot detect a 5 GHz-only network, explaining why other users (with 5 GHz support) can connect.

Why this answer

The user's laptop can see neighboring 2.4 GHz networks but not the office's 5 GHz-only SSID, while other users connect fine. This indicates the laptop's wireless adapter lacks 5 GHz support, making option C correct because 5 GHz-only networks are invisible to 2.4 GHz-only adapters.

Exam trap

CompTIA A+ exams often test the misconception that encryption or SSID broadcast settings are the cause when the real issue is frequency band incompatibility, leading candidates to overlook the adapter's hardware limitations.

How to eliminate wrong answers

Option A is wrong because if the router's SSID broadcast were disabled, no users (including others in the office) would see the network, but the question states other users connect without issue. Option B is wrong because airplane mode disables all wireless radios, preventing the laptop from seeing any Wi-Fi networks at all, yet the user can see several neighboring networks. Option D is wrong because WPA3 encryption does not affect SSID visibility; it only impacts authentication and encryption, and the laptop would still see the network's beacon frames regardless of encryption type.

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694

MCQhard

A technician is replacing a faulty motherboard in a workstation. After installing the new board, the system powers on but there is no display output from the integrated graphics port. The CPU does not have integrated graphics. What should the technician do?

A.Clear the CMOS to reset BIOS settings

B.Install a dedicated GPU into a PCIe slot

C.Update the motherboard BIOS

D.Check the monitor cable connection

AnswerB

Since the CPU has no integrated graphics, a dedicated GPU is required for display output.

Why this answer

If the CPU lacks integrated graphics, the motherboard's video output ports will not function. A dedicated GPU must be installed. This is a common oversight when switching from a CPU with integrated graphics to one without.

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695

MCQmedium

A user complains that their laptop frequently disconnects from the Wi-Fi when they move to the conference room, which is 50 feet from the access point through two walls. The network uses 5 GHz. What is the MOST likely cause of the disconnects?

A.The access point is overloaded with too many clients.

B.The laptop's power management settings are turning off the Wi-Fi adapter.

C.5 GHz signals have poor penetration through walls.

D.The conference room has a metal door that blocks the signal.

AnswerC

5 GHz is more susceptible to attenuation from obstacles, so moving through two walls can cause signal loss and disconnects.

Why this answer

The 5 GHz band offers higher data rates and less interference than 2.4 GHz, but it has significantly poorer wall penetration due to its shorter wavelength. At 50 feet through two walls, the signal attenuation is severe enough to cause frequent disconnects, especially if the walls contain dense materials like concrete or metal studs.

Exam trap

A common mistake is to assume that 5 GHz is always superior because it is faster, without recognizing its trade-off in range and penetration through physical obstacles.

How to eliminate wrong answers

Option A is wrong because an overloaded access point would cause slow speeds or connection failures for all clients, not just when moving to a specific location; the problem is location-dependent, not load-dependent. Option B is wrong because power management settings that turn off the Wi-Fi adapter would cause disconnects regardless of location, not specifically when moving to the conference room. Option D is wrong because while a metal door can block signals, the question does not mention a metal door; the most direct and common cause given the distance and two walls is the inherent poor penetration of 5 GHz through walls.

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696

MCQeasy

A user wants to connect a new laptop to a wired network that uses 802.1X authentication. What must be configured on the laptop to ensure successful network access?

A.A static IP address in the same subnet as the network

B.The correct SSID and wireless security key

C.Valid 802.1X credentials (username and password or certificate)

D.A crossover cable to connect to the switch

AnswerC

802.1X requires authentication credentials to gain access to the network; without them, the port will not forward traffic.

Why this answer

This question tests knowledge of network authentication methods. 802.1X requires a username and password (or certificate) to authenticate to the network, typically via RADIUS. Without proper credentials, the switch port will remain blocked.

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697

MCQeasy

A small office is setting up a new VoIP phone system. The IT staff must run new cabling to each desk. Which cable type is most appropriate for connecting VoIP phones to the network?

A.Coaxial cable

B.Cat5e UTP

C.Fiber optic cable

D.Serial cable

AnswerB

Cat5e supports 1000 Mbps and Power over Ethernet (PoE), making it suitable for VoIP phones. It is a standard choice.

Why this answer

Cat5e UTP cable supports 1000BASE-T Ethernet at up to 100 meters, which is sufficient for VoIP phones that typically require 100 Mbps or 1 Gbps connectivity and can also receive Power over Ethernet (PoE) from a switch. This makes it the standard choice for new office cabling for VoIP deployments.

Exam trap

One common misconception is that fiber optic cable is required for VoIP due to 'better quality,' but Cat5e/Cat6 UTP is the standard for horizontal cabling to endpoints, as fiber is typically reserved for backbone or long-distance runs.

How to eliminate wrong answers

Option A is wrong because coaxial cable is used for broadband internet (e.g., DOCSIS) or cable TV, not for direct Ethernet connections to VoIP phones, and it lacks the twisted-pair structure needed for differential signaling in Ethernet. Option C is wrong because fiber optic cable is overkill for a small office VoIP deployment; it is more expensive, harder to terminate, and not required for the short distances and bandwidth needs of VoIP phones, though it could be used for backbone links. Option D is wrong because serial cable (e.g., RS-232) is used for legacy console connections or modem links, not for Ethernet networking, and cannot carry VoIP traffic or PoE.

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698

MCQmedium

A technician is troubleshooting a Lenovo ThinkPad that will not turn on. When the power button is pressed, the keyboard lights flash briefly, then nothing. The battery is known to be charged. After removing the battery and holding the power button for 30 seconds, the laptop still does not power on. What should the technician try next?

A.Replace the CMOS battery.

B.Connect the laptop to a known-good AC adapter and try to power on without the battery installed.

C.Reseat the RAM modules.

D.Perform a hard reset by disconnecting the internal battery (if accessible) and holding the power button for 60 seconds.

AnswerB

This isolates the issue to either the laptop's internal power circuitry or the battery/charger. If it powers on with the AC adapter, the battery or its connection is faulty. If not, the motherboard likely has a fault.

Why this answer

This is a classic symptom of residual charge in the capacitors preventing a proper boot. The 'remove battery and hold power button' step discharges the system. If that fails, the next step is to test with a known-good AC adapter, as the internal charging circuit may be faulty.

If that also fails, the motherboard or power button may be defective.

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699

MCQeasy

A customer reports that their laptop can connect to the internet via Wi-Fi but cannot access any network shares on the local file server. Other devices on the same network can access the shares. What is the most likely cause?

A.The file server is powered off.

B.The laptop has a misconfigured subnet mask.

C.The Wi-Fi router is overloaded.

D.The laptop's firewall is blocking all traffic.

AnswerB

Correct. A wrong subnet mask can allow internet access but block local LAN communication.

Why this answer

This scenario tests understanding of network segmentation and IP addressing. The laptop can reach the internet (default gateway works) but not local resources, indicating a subnet mask or VLAN mismatch. The most common cause is an incorrect subnet mask, which prevents the laptop from recognizing the file server as local.

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700

MCQmedium

A user reports that their iPhone 13 will not charge when plugged into the USB-C port on their company-issued laptop, but it charges normally from the wall adapter. The laptop's USB-C port works with other devices. What is the most likely issue?

A.The iPhone's Lightning-to-USB-C cable is faulty.

B.The laptop's USB-C port does not support Apple's Power Delivery (PD) protocol.

C.The iPhone's charging port is clogged with debris.

D.The laptop's USB-C driver is outdated.

AnswerB

Many laptops' USB-C ports are data-only or provide limited power. iPhones require a specific PD negotiation to charge. Without it, the phone may not draw power, or the port may not supply it.

Why this answer

This is a classic power delivery negotiation issue. iPhones use a proprietary charging protocol over USB-C (or Lightning). The laptop's USB-C port may not support the Apple-specific charging profile or may not provide enough power (e.g., only 5V/0.5A). The wall adapter provides the correct voltage and current for the iPhone.

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701

MCQhard

A multifunction printer is connected to a network via Ethernet and also has a USB port for direct printing. A user plugs a USB flash drive into the printer to print a PDF, but the printer does not recognize the drive. The drive works on other computers. What is the most likely cause?

A.The PDF file is password-protected.

B.The USB flash drive is formatted as NTFS, which the printer does not support.

C.The printer's USB port is only for service use.

D.The printer's IP address is conflicting with another device.

AnswerB

Most printers only support FAT32 or exFAT; NTFS is not commonly supported.

Why this answer

Multifunction printers often have limitations on USB drive compatibility. The most common issues are the file system format (e.g., exFAT vs. FAT32) or the drive's power draw.

Many printers only support FAT32 formatted drives, and some USB 3.0 drives may not be recognized due to power or protocol differences.

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702

MCQhard

A company is adopting a cloud-first strategy and wants to minimize vendor lock-in. They plan to use multiple cloud providers for different workloads. Which cloud deployment model does this describe?

A.Public cloud

B.Hybrid cloud

C.Multi-cloud

D.Community cloud

AnswerC

Multi-cloud uses services from multiple public cloud providers, reducing dependency on any single vendor.

Why this answer

A multi-cloud strategy involves using services from multiple cloud providers to avoid dependence on a single vendor. This is distinct from a hybrid cloud, which combines public and private clouds. Public cloud uses one provider, and community cloud is shared among organizations.

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703

MCQhard

A user reports that their 4K monitor connected via DisplayPort 1.2 only shows a 30Hz refresh rate at native resolution, causing mouse movement to feel laggy. The monitor supports 60Hz at 4K. What is the most likely cause?

A.The monitor's firmware is outdated

B.The graphics card does not support 4K at 60Hz

C.The DisplayPort cable is only rated for DisplayPort 1.1

D.The monitor's refresh rate is set to 30Hz in the display settings

AnswerC

DP 1.1 cables cannot handle the bandwidth for 4K 60Hz, forcing 30Hz.

Why this answer

DisplayPort 1.2 has sufficient bandwidth (17.28 Gbps) to support 4K at 60Hz with 8-bit color. However, a cable only rated for DisplayPort 1.1 is limited to 8.64 Gbps, which cannot handle the full data rate required for 4K at 60Hz, forcing the signal to drop to 30Hz. This is the most likely cause because the cable is a physical bottleneck, even though the GPU and monitor both support the higher refresh rate.

Exam trap

CompTIA often tests the misconception that the refresh rate issue is caused by a monitor setting or GPU limitation, when in fact the cable's bandwidth rating is the critical bottleneck that candidates overlook.

How to eliminate wrong answers

Option A is wrong because outdated firmware would typically cause issues like flickering, black screens, or failure to detect the monitor, not a consistent 30Hz cap at 4K resolution. Option B is wrong because if the graphics card did not support 4K at 60Hz, the user would likely be unable to select 4K resolution at all, or the system would default to a lower resolution, not just a lower refresh rate. Option D is wrong because while the refresh rate setting could be manually set to 30Hz, the question states the user reports the issue as occurring at native resolution, and the most likely cause given the DisplayPort 1.2 connection is a cable bandwidth limitation, not a simple settings misconfiguration.

Full explanation →

704

MCQeasy

A customer reports that their desktop computer, used for video editing, frequently runs out of memory and slows down. They want to upgrade the RAM but are not sure which type is compatible. The motherboard manual lists support for DDR4-3200 and DDR4-2666. The system currently has two 8 GB DDR4-2666 modules installed. What is the best upgrade to maximize performance and capacity?

A.Add two 8 GB DDR4-3200 modules to the existing RAM.

B.Replace the two 8 GB modules with two 16 GB DDR4-2666 modules.

C.Replace the two 8 GB modules with two 16 GB DDR4-3200 modules.

D.Add two 16 GB DDR4-2666 modules to the existing RAM.

AnswerC

This provides both higher capacity and faster speed, fully utilizing the motherboard's supported speed and improving performance.

Why this answer

Mixing RAM speeds forces all modules to run at the slowest speed, so adding DDR4-3200 modules would cause them to downclock to 2666 MHz, wasting potential performance. The best upgrade is to replace the existing modules with a matched kit of DDR4-3200 modules, ensuring full speed and capacity. This scenario tests understanding of RAM speed compatibility and the importance of matched modules for optimal performance.

Full explanation →

705

MCQmedium

A technician is troubleshooting a DSL connection that syncs at only 1.5 Mbps when the plan is 10 Mbps. The line is 12,000 feet from the central office. What is the most likely cause?

A.The modem is defective.

B.The distance from the central office is too great.

C.The router's firmware needs updating.

D.The ISP is throttling the connection.

AnswerB

DSL speeds decrease with distance; 12,000 feet is near the limit for many DSL services, causing reduced sync rates.

Why this answer

DSL speeds degrade significantly with distance due to signal attenuation and noise. At 12,000 feet from the central office, ADSL2+ typically cannot sustain 10 Mbps; 1.5 Mbps is consistent with the maximum achievable rate at that distance. The sync rate is determined by line conditions, not the plan speed, making distance the primary limiting factor.

Exam trap

Cisco often tests the misconception that DSL speeds are always limited by the service plan rather than physical-layer constraints, leading candidates to overlook distance as the primary factor when sync rates are far below the plan speed.

How to eliminate wrong answers

Option A is wrong because a defective modem would typically cause no sync, intermittent drops, or CRC errors, not a stable but low sync rate that matches distance-based attenuation. Option C is wrong because router firmware updates address security or feature issues, not physical-layer line rate limitations imposed by loop length and signal-to-noise ratio. Option D is wrong because ISP throttling is applied at the protocol layer (e.g., shaping traffic) and does not affect the DSL sync rate, which is negotiated between the modem and DSLAM based on line quality.

Full explanation →

706

MCQeasy

A technician is deploying an MFP that supports both USB and network connectivity. The office wants all users on the network to be able to print and scan from the device. Which connection method should the technician use?

A.USB connection to a single workstation

B.Ethernet connection to the network switch

C.Bluetooth connection to each user's device

D.Parallel port connection to a print server

AnswerB

Ethernet provides network access for all users to print and scan, making it the appropriate choice for shared use.

Why this answer

Network connectivity (Ethernet or Wi-Fi) allows multiple users to access the MFP simultaneously, while USB is limited to a single directly connected computer. For shared access in an office, network is required.

Full explanation →

707

MCQhard

During a motherboard replacement, you install the new board and connect all cables. When you power on, the system beeps continuously (long beeps). The CPU fan spins, but there is no display. What is the most likely cause?

A.The CPU is not compatible with the new motherboard

B.The RAM is not seated correctly or is faulty

C.The power supply is underpowered

D.The motherboard is shorting against the case

AnswerB

Continuous long beeps are a common BIOS code for memory failure; reseating or replacing the RAM is the first step.

Why this answer

Continuous long beeps typically indicate a memory (RAM) issue. This could be due to improperly seated RAM, incompatible memory, or a faulty memory slot. The CPU fan spinning suggests power is reaching the board, but the POST process halts at memory initialization.

Full explanation →

708

MCQhard

A technician is troubleshooting a hybrid cloud environment where an on-premises application needs to access a cloud-based database. The connection is intermittent and slow. The technician checks the local network and finds no issues. Which of the following is the most likely cause?

A.The cloud database is configured with the wrong DNS records

B.The on-premises firewall is blocking the database port

C.The internet connection between the sites has high latency or packet loss

D.The cloud provider is performing maintenance on the database server

AnswerC

High latency or packet loss on the WAN link can cause intermittent slowdowns and timeouts, even with a healthy local network.

Why this answer

In a hybrid cloud, latency and bandwidth issues often stem from the internet connection between the on-premises site and the cloud. Even if the local network is fine, the WAN link may be congested or have high latency. DNS or firewall issues would typically cause complete failures, not intermittent slowness.

Full explanation →

709

MCQeasy

A customer complains that their web browser cannot load any HTTPS websites, but HTTP sites work fine. The firewall is configured to allow common ports. Which port is most likely being blocked?

A.80

B.443

C.22

D.53

AnswerB

Port 443 is HTTPS. Blocking it prevents secure web traffic while allowing unencrypted HTTP.

Why this answer

HTTPS uses TCP port 443 for encrypted communication via TLS/SSL. If HTTP (port 80) works but HTTPS fails, the firewall is likely blocking outbound or inbound traffic on port 443, even though it allows common ports. This prevents the browser from establishing the secure connection required for HTTPS websites.

Exam trap

In CompTIA A+ 220-1101, a common trap is that many candidates assume 'common ports' includes HTTPS (port 443) by default, but the CompTIA objectives note that port 443 must be explicitly allowed for HTTPS. The symptom of HTTP working but HTTPS failing is a classic indicator of a blocked port 443.

How to eliminate wrong answers

Option A is wrong because port 80 is used for HTTP, which works fine per the customer's report, so it is not blocked. Option C is wrong because port 22 is used for SSH (Secure Shell) remote administration, not for web browsing, and its blocking would not affect HTTPS. Option D is wrong because port 53 is used for DNS (Domain Name System) queries; if it were blocked, neither HTTP nor HTTPS sites would resolve, but HTTP works, so DNS is functioning.

Full explanation →

710

MCQeasy

A customer reports that their Bluetooth keyboard intermittently disconnects from their tablet while typing. The tablet and keyboard are less than a meter apart, and no other Bluetooth devices are nearby. Which of the following is the most likely cause of the disconnection?

A.The tablet's Bluetooth adapter is defective.

B.The keyboard's battery is low.

C.The user's body is blocking the Bluetooth signal when typing.

D.There is interference from a nearby Wi-Fi network.

AnswerC

The human body can absorb Bluetooth signals, and when the user positions themselves between the keyboard and tablet, the signal is weakened, causing intermittent drops.

Why this answer

The most likely cause is that the user's body is blocking the Bluetooth signal. Bluetooth operates in the 2.4 GHz ISM band, which is heavily absorbed by water in the human body. When typing, the user's hands and torso can create a significant attenuation path between the keyboard and tablet, especially if the tablet is placed behind the user or at an angle that places the body in the direct line of sight.

This intermittent physical obstruction explains the disconnection pattern without any other devices nearby.

Exam trap

The 220-1201 exam often tests the misconception that Bluetooth disconnections are always caused by interference or hardware failure, when in fact the human body's absorption of 2.4 GHz signals is a common and overlooked cause of intermittent connectivity.

How to eliminate wrong answers

Option A is wrong because a defective Bluetooth adapter would cause persistent or complete failure to connect, not intermittent disconnections only while typing. Option B is wrong because a low battery typically causes gradual performance degradation or failure to power on, not intermittent disconnects that correlate with typing posture. Option D is wrong because interference from a nearby Wi-Fi network would affect all Bluetooth devices in the area and would not be isolated to a specific typing motion; Wi-Fi and Bluetooth both use the 2.4 GHz band but adaptive frequency hopping (AFH) in Bluetooth mitigates most co-channel interference.

Full explanation →

711

MCQmedium

A company's web server is accessible from the internal network but not from the internet. The server has a static IP of 192.168.1.10. The firewall is configured to allow HTTP and HTTPS traffic. What is the most likely missing configuration?

A.The server's default gateway is set to the firewall's LAN IP

B.The firewall's NAT is disabled

C.Port forwarding rules are not configured on the firewall

D.The server has a public IP address assigned

AnswerC

Without port forwarding, the firewall does not know which internal device should receive incoming traffic on ports 80/443, so external requests are dropped.

Why this answer

The server has a private IP (192.168.1.10), so for internet clients to reach it, the firewall must translate the public destination IP to the private server IP using port forwarding (a form of Destination NAT). Without port forwarding rules, the firewall will receive HTTP/HTTPS traffic on its public interface but not know which internal server to send it to, even though the firewall's ACL allows the traffic. Option C correctly identifies this missing configuration.

Exam trap

The trap here is that candidates often assume that simply allowing HTTP/HTTPS in the firewall's ACL is sufficient, forgetting that inbound traffic to a private IP requires a destination NAT (port forwarding) rule to map the public IP/port to the internal server.

How to eliminate wrong answers

Option A is wrong because the server's default gateway must be set to the firewall's LAN IP for the server to send replies back to the internet; if that were missing, internal clients might still reach the server, but internet replies would fail—however, the question states the server is accessible from the internal network, so the gateway is likely correct. Option B is wrong because NAT being disabled would prevent any translation of private addresses, but the core issue is the lack of a specific mapping (port forwarding) for inbound traffic; even with NAT enabled, without port forwarding, unsolicited inbound traffic to a private IP is not routed. Option D is wrong because the server has a private IP (192.168.1.10), and assigning a public IP directly to the server would be an alternative solution, but the question asks for the most likely missing configuration given the current setup—the server already has a static private IP, and the firewall is expected to perform NAT/port forwarding.

Full explanation →

712

MCQhard

A virtual machine running a database server experiences frequent disk I/O bottlenecks. The host has multiple physical disks. Which configuration change would most effectively improve performance?

A.Increase the virtual disk size

B.Use a virtual disk on a network-attached storage (NAS)

C.Configure a pass-through disk for the VM

D.Enable disk compression on the virtual disk

AnswerC

Pass-through disks eliminate the hypervisor's I/O stack, providing near-native performance.

Why this answer

Pass-through disks give a VM direct access to a physical disk, bypassing the hypervisor's file system layer, reducing overhead and improving I/O performance for database workloads.

Full explanation →

713

MCQeasy

A user reports that their smartphone battery drains quickly and the device feels warm to the touch, especially when using wireless charging. They are using a third-party wireless charger. What is the most likely cause of this issue?

A.The smartphone battery is defective and needs replacement.

B.The wireless charger is not properly matched to the device's charging standard, causing inefficient power transfer.

C.The device's operating system needs an update to support wireless charging.

D.The user is using a case that is too thick for wireless charging.

AnswerB

This is correct; mismatched charging standards lead to heat generation and slow charging, which can drain the battery faster.

Why this answer

Third-party wireless chargers may not fully comply with the Qi standard or may lack proper Foreign Object Detection (FOD). When the charger and device are mismatched, power transfer becomes inefficient, generating excess heat as wasted energy. This heat causes the battery to drain faster (due to thermal runaway in charging circuits) and makes the device feel warm.

Exam trap

The 220-1201 exam often tests the misconception that any third-party accessory is inherently safe or that heat always indicates a defective battery, when in reality mismatched charging standards are the primary cause of thermal issues in wireless charging scenarios.

How to eliminate wrong answers

Option A is wrong because a defective battery typically causes rapid drain even when not charging, and would not specifically correlate with warmth during wireless charging. Option C is wrong because OS updates do not enable or disable wireless charging hardware support; wireless charging is a hardware-level feature controlled by the charging IC and Qi protocol. Option D is wrong because a thick case would primarily reduce charging speed or prevent charging altogether, not cause significant heat generation and rapid battery drain specifically when using wireless charging.

Full explanation →

714

MCQmedium

A technician is troubleshooting a network where users can access the internet but cannot connect to a specific internal application server by its hostname. Pinging the server's IP address works. The DNS server is configured correctly for external names. What is the most likely cause?

A.The DHCP server is out of IP addresses

B.The DNS server does not have an A record for the application server

C.NAT is misconfigured for the internal network

D.The proxy server is blocking the hostname

AnswerB

Without an A record, DNS cannot resolve the hostname to the server's IP, even though the server is reachable by IP.

Why this answer

Since users can access the internet and ping the server by IP, the network connectivity and external DNS resolution are working. The failure to resolve the internal server's hostname indicates that the DNS server lacks an A record for that specific hostname, preventing name-to-IP resolution for internal resources.

Exam trap

CompTIA often tests the distinction between connectivity issues (IP reachable) and name resolution issues (hostname unreachable) to trap candidates into misdiagnosing DNS problems as routing or NAT failures.

How to eliminate wrong answers

Option A is wrong because if the DHCP server were out of IP addresses, clients would fail to obtain an IP configuration and would not be able to access the internet or ping any IP. Option C is wrong because NAT is used for translating private IPs to public IPs for external access; internal-to-internal communication does not involve NAT, so misconfigured NAT would not affect hostname resolution to an internal server. Option D is wrong because a proxy server typically handles HTTP/HTTPS traffic and could block hostnames, but the question states users can access the internet, and pinging the server's IP works, indicating the issue is specifically with DNS resolution, not proxy filtering.

Full explanation →

715

MCQeasy

A customer reports that their desktop PC emits a series of three long beeps and then nothing appears on the screen. The system was working fine yesterday. What is the most likely cause of this issue?

A.Faulty power supply unit

B.Loose or failed RAM module

C.Overheating CPU

D.Corrupted operating system files

AnswerB

Three long beeps are a standard BIOS code for a memory error, indicating the RAM is not detected or is faulty.

Why this answer

Three long beeps during POST typically indicate a memory (RAM) failure. This is a common POST code for many BIOS manufacturers, and reseating or replacing the RAM modules is the first troubleshooting step. The beeps are a diagnostic signal from the motherboard that the system cannot proceed without functional memory.

Full explanation →

716

MCQmedium

A technician is setting up a network for a university campus that spans several buildings across a 2-kilometer area. The network must support both wired and wireless connections for thousands of users. Which network type best describes this setup?

A.Wide Area Network (WAN)

B.Campus Area Network (CAN)

C.Personal Area Network (PAN)

D.Metropolitan Area Network (MAN)

AnswerB

A CAN is designed for a campus environment, connecting multiple buildings within a few kilometers, and can handle both wired and wireless users.

Why this answer

A Campus Area Network (CAN) is specifically designed to interconnect multiple buildings within a limited geographic area, such as a university campus or corporate park, typically spanning up to a few kilometers. This setup requires high-speed backbone links (often fiber optic) to support thousands of users with both wired and wireless access, which aligns perfectly with the CAN definition.

Exam trap

The trap here is that candidates often confuse CAN with MAN because both involve multiple buildings, but the key distinction is the geographic scale: CAN is limited to a campus (typically <5 km), while MAN covers a city-wide area, and Cisco tests this by providing distance or scope clues like '2-kilometer area' to force the correct classification.

How to eliminate wrong answers

Option A is wrong because a Wide Area Network (WAN) covers large geographic areas (e.g., cities, countries) using leased lines or public infrastructure, which is excessive and unnecessary for a 2-kilometer campus. Option C is wrong because a Personal Area Network (PAN) is limited to a very short range (typically up to 10 meters) for connecting personal devices like Bluetooth headphones or smartphones, not a multi-building campus. Option D is wrong because a Metropolitan Area Network (MAN) spans a city or large metropolitan area (typically 5-50 km), which is larger than the 2-km campus described and often involves service provider connections rather than private campus cabling.

Full explanation →

717

MCQmedium

A small office uses a single router with four switch ports. Users on port 4 cannot access the internet, but they can communicate with each other. Port 4's LED is solid green. What is the most likely cause?

A.Port 4 is administratively disabled.

B.The cable on port 4 is faulty.

C.Port 4 is assigned to a different VLAN without internet access.

D.The router's DHCP pool is exhausted.

AnswerC

Correct. VLAN misconfiguration can isolate the port from the router's default gateway.

Why this answer

This scenario tests understanding of VLANs and router configuration. Inter-VLAN routing is required for different VLANs to reach the internet. If port 4 is on a different VLAN without a route to the internet, users can talk locally but not externally.

Full explanation →

718

MCQeasy

A small business wants to move its on-premises file server to the cloud to reduce hardware maintenance costs. They need full control over the operating system and applications running on the server. Which cloud service model should they choose?

A.Software as a Service (SaaS)

B.Platform as a Service (PaaS)

C.Infrastructure as a Service (IaaS)

D.Desktop as a Service (DaaS)

AnswerC

IaaS provides virtualized hardware where the user has full control over the OS, storage, and applications.

Why this answer

This scenario requires the customer to manage the OS and applications, which is characteristic of IaaS. IaaS provides virtual machines where the user controls the OS and installed software, while the provider manages the physical hardware.

Full explanation →

719

MCQhard

A network administrator needs to determine the exact model and firmware version of a switch located in a remote wiring closet without physically visiting the site. The switch is configured with an IP address on the management VLAN. Which tool can be used to query the switch's SNMP agent for this information?

A.Packet analyzer (e.g., Wireshark)

B.SNMP management tool

C.Port scanner (e.g., Nmap)

D.Wi-Fi analyzer

AnswerB

An SNMP management tool can send GET requests to the switch's SNMP agent to retrieve device information such as model and firmware version.

Why this answer

An SNMP management tool can query the switch's SNMP agent using GET requests to retrieve the exact model and firmware version from the system MIB (RFC 1213), specifically the sysDescr (1.3.6.1.2.1.1.1) and sysObjectID (1.3.6.1.2.1.1.2) OIDs. This allows remote, agent-based access without physical site visits, as the switch is reachable via its management VLAN IP address.

Exam trap

The exam often tests the distinction between passive monitoring tools (packet analyzers) and active management tools (SNMP managers), leading candidates to mistakenly choose Wireshark because they think it can 'query' a device, when in fact it only captures existing traffic.

How to eliminate wrong answers

Option A is wrong because a packet analyzer like Wireshark passively captures network traffic but cannot actively query an SNMP agent; it would only see SNMP responses if another tool initiated the query. Option C is wrong because a port scanner like Nmap can detect open ports (e.g., UDP 161 for SNMP) but cannot retrieve MIB object values like model or firmware version without an SNMP query engine. Option D is wrong because a Wi-Fi analyzer is designed to monitor wireless signal strength, channels, and interference, not to query wired switch management information via SNMP.

Full explanation →

720

MCQeasy

A customer reports that their new SSD is not detected by the BIOS. The drive is properly connected to the SATA port and power supply. What is the most likely cause of this issue?

A.The SATA cable is faulty.

B.The SSD needs to be initialized in Disk Management.

C.The power supply unit is insufficient.

D.The SSD is incompatible with the motherboard.

AnswerA

Correct. A faulty SATA cable is a common hardware failure that can prevent BIOS detection even when the drive is properly connected.

Why this answer

For a new SSD not detected by the BIOS despite proper connections, the most likely cause is a faulty SATA cable. The BIOS must detect the drive before the OS can see it; initialization in Disk Management is an OS-level step that requires the drive to already be recognized by the BIOS.

Exam trap

A common mistake is to assume that the drive not appearing in Windows means it needs initialization, but if the BIOS itself does not detect the drive, no OS tool can fix that.

Full explanation →

721

MCQeasy

A customer reports that their external monitor connected via HDMI flickers intermittently. They have tried a different HDMI cable and a different monitor, but the issue persists. The laptop display works fine. Which component is most likely causing the problem?

A.The laptop's graphics driver

B.The HDMI cable

C.The external monitor

D.The laptop's HDMI port

AnswerD

Since the internal display works and swapping cable/monitor didn't help, the HDMI port is the remaining variable.

Why this answer

Since the issue persists after swapping both the HDMI cable and the external monitor, the problem is isolated to the laptop's HDMI port. A faulty or damaged HDMI port can cause intermittent signal loss due to poor physical contact, bent pins, or internal solder fractures, leading to flickering. The laptop's internal display works fine, ruling out the graphics driver as the primary cause.

Exam trap

The trap here is that candidates may incorrectly blame the graphics driver because they assume external display issues are always software-related, ignoring the physical integrity of the port. In CompTIA A+ troubleshooting, it's important to isolate the problem by swapping known-good components before concluding.

How to eliminate wrong answers

Option A is wrong because the laptop's internal display functions correctly, indicating the graphics driver is capable of rendering video without issues; a driver problem would typically affect both displays or cause system-wide artifacts. Option B is wrong because the customer already tried a different HDMI cable, and the flickering persisted, eliminating the cable as the variable. Option C is wrong because the customer tested a different external monitor and the issue remained, proving the monitor is not at fault.

Full explanation →

722

MCQeasy

A user reports that their computer's clock is consistently off by several minutes, causing authentication failures with the domain. The network uses Active Directory. Which service should be checked first?

A.DHCP

B.DNS

C.NTP

D.RADIUS

AnswerC

NTP synchronizes system clocks, preventing time-related authentication issues.

Why this answer

NTP (Network Time Protocol) is the correct service to check first because the symptom—a clock consistently off by several minutes causing authentication failures with an Active Directory domain—is a classic sign of time synchronization issues. Active Directory uses Kerberos for authentication, which requires the client and domain controller clocks to be within a default skew of 5 minutes (RFC 4120). If the time is off, Kerberos tickets are rejected, leading to authentication failures.

Exam trap

The trap here is that candidates often confuse time synchronization with DHCP or DNS, assuming those services handle all network configuration, but NTP is the root cause for Kerberos authentication failures due to time skew.

How to eliminate wrong answers

Option A is wrong because DHCP (Dynamic Host Configuration Protocol) assigns IP addresses, subnet masks, and other network configuration parameters, but it does not manage system time synchronization; while DHCP can provide an NTP server option (option 42), the core issue is the time sync service itself, not the address assignment. Option B is wrong because DNS (Domain Name System) resolves hostnames to IP addresses and is critical for domain discovery and service location, but it does not directly affect the system clock or Kerberos time skew requirements. Option D is wrong because RADIUS (Remote Authentication Dial-In User Service) is used for network access authentication (e.g., VPN, 802.1X), not for domain authentication within Active Directory, and it does not handle time synchronization.

Full explanation →

723

MCQmedium

During a hardware installation, a technician needs to connect the front panel USB 3.0 ports of a new case to the motherboard. The motherboard has a 20-pin USB 3.0 header. Which cable from the case should be connected to this header?

A.A 9-pin USB 2.0 cable

B.A 4-pin power LED cable

C.A 10-pin audio cable

D.A 20-pin (19-pin) USB 3.0 cable

AnswerD

This cable matches the motherboard's USB 3.0 header, providing data connectivity for the front USB 3.0 ports.

Why this answer

The USB 3.0 internal header is a 20-pin (or 19-pin) connector that carries data for up to two USB 3.0 ports. The case's USB 3.0 cable will have a matching connector. USB 2.0 headers are 9-pin, and the audio header is different.

The power LED is a separate 2-pin connector.

Full explanation →

724

MCQmedium

A technician is setting up a dual-monitor configuration for a financial analyst who needs to see many columns of data side by side. The user wants the sharpest possible text and the highest pixel density. Which type of display panel should the technician recommend?

A.TN (Twisted Nematic) panel

B.IPS (In-Plane Switching) panel

C.VA (Vertical Alignment) panel

D.OLED (Organic Light Emitting Diode) panel

AnswerB

IPS panels provide excellent color accuracy, wide viewing angles, and consistent brightness, which are ideal for sharp text and data analysis.

Why this answer

IPS panels are the correct choice because they offer superior color accuracy, wide viewing angles, and high pixel density, which are essential for a financial analyst viewing many columns of data side by side. Unlike TN or VA panels, IPS technology maintains consistent brightness and color across the entire screen, ensuring sharp text without distortion when viewed from different angles. This makes IPS ideal for tasks requiring precise visual clarity and minimal color shift.

Exam trap

The trap here is that candidates may choose OLED for its high contrast and pixel density, overlooking its burn-in risk with static content, or choose TN for its fast response time, ignoring the critical need for viewing angle stability and text sharpness in multi-monitor setups.

How to eliminate wrong answers

Option A is wrong because TN panels have poor viewing angles and lower color accuracy, causing text to appear washed out or distorted when viewed off-center, which is unsuitable for side-by-side data analysis. Option C is wrong because VA panels, while offering better contrast than TN, suffer from slower response times and can exhibit color shifting at extreme angles, reducing text sharpness in multi-monitor setups. Option D is wrong because OLED panels, though offering high contrast and pixel density, are prone to burn-in and have a shorter lifespan when displaying static content like spreadsheets, making them less reliable for a financial analyst's prolonged use.

Full explanation →

725

MCQeasy

A technician is installing a new VoIP phone for a user. The user's desk already has a Cat6 wall jack, but the phone requires both network connectivity and a separate power source. The technician has a limited number of power outlets nearby. What is the simplest solution?

A.Run a new power extension cord from the nearest outlet.

B.Use a Power over Ethernet (PoE) injector between the wall jack and the phone.

C.Replace the Cat6 cable with a USB-C cable for power.

D.Install a wireless bridge to eliminate the cable.

AnswerB

A PoE injector adds power to the Ethernet cable, allowing the phone to receive both data and power over one cable.

Why this answer

This question tests knowledge of Power over Ethernet (PoE) as a cabling-related concept. The correct answer is to use a PoE switch or injector, which sends power over the Ethernet cable, eliminating the need for a separate power adapter.

Full explanation →

726

MCQhard

A company's IT policy requires that all network traffic from the guest Wi-Fi be isolated from the internal corporate network. The guest network uses a separate SSID and VLAN. Which additional configuration is necessary to ensure complete isolation?

A.Enable DHCP snooping on the guest VLAN

B.Configure a router-on-a-stick with subinterfaces

C.Implement an ACL that denies traffic from the guest VLAN to the corporate VLAN

D.Set the guest network to use a different subnet mask

AnswerC

An ACL on the router or Layer 3 switch can block all traffic from the guest VLAN to the corporate VLAN, ensuring isolation.

Why this answer

Access Control Lists (ACLs) on the router or firewall can block traffic between VLANs. Even with separate VLANs, inter-VLAN routing must be explicitly denied to prevent guest devices from reaching the corporate network.

Full explanation →

727

MCQmedium

A technician is replacing a cracked screen on a tablet. After removing the digitizer and LCD assembly, they notice the home button flex cable is torn. The tablet still has a physical home button. What should the technician do to ensure the repair is complete and the home button functions?

A.Solder the torn ends of the flex cable together.

B.Use electrical tape to hold the torn cable together.

C.Replace the home button flex cable with a new one.

D.Ignore the tear and reassemble the tablet.

AnswerC

Replacing the torn flex cable with a new one restores the electrical connection, allowing the home button to function properly.

Why this answer

Option C is correct because a torn flex cable cannot be reliably repaired by soldering or taping due to the fine pitch and multilayer construction of modern tablet flex cables. Replacing the entire home button flex cable assembly is the only method that restores the electrical continuity and mechanical integrity required for the physical home button to function properly.

Exam trap

CompTIA A+ often tests the misconception that a torn flex cable can be repaired with simple tools like solder or tape, when in fact the only proper solution is to replace the entire flex cable assembly.

How to eliminate wrong answers

Option A is wrong because soldering the torn ends of a flex cable is impractical; the traces are extremely thin, often embedded in multiple layers, and the heat from soldering can damage adjacent components or cause short circuits. Option B is wrong because electrical tape provides no electrical connection and will not bridge the broken traces, so the home button will remain non-functional. Option D is wrong because ignoring the tear and reassembling the tablet leaves the home button circuit open, meaning the button will not work and the repair is incomplete.

Full explanation →

728

MCQhard

A technician is replacing the battery in a slim laptop where the battery is glued inside the chassis. After removing the bottom cover, the technician sees the battery is firmly attached with adhesive. What is the safest method to remove the battery without damaging the laptop?

A.Use a flathead screwdriver to pry the battery out forcefully.

B.Apply isopropyl alcohol around the battery edges to weaken the adhesive, then gently pry with a plastic spudger.

C.Heat the battery with a heat gun to soften the adhesive.

D.Use a suction cup to pull the battery straight up.

AnswerB

Isopropyl alcohol safely dissolves the adhesive without damaging the battery or laptop. A plastic spudger prevents punctures.

Why this answer

Option B is correct because isopropyl alcohol (90% or higher) safely weakens the adhesive bond without damaging the battery or surrounding components. Using a plastic spudger to gently pry after applying alcohol minimizes the risk of puncturing the lithium-ion battery, which could cause a fire or chemical leak. This method is the industry-recommended approach for glued-in batteries in slim laptops.

Exam trap

The trap here is that candidates may think heat is safe because it works for other adhesives, but CompTIA tests the specific danger of thermal runaway in lithium-ion batteries, making heat a hazardous choice.

How to eliminate wrong answers

Option A is wrong because using a flathead screwdriver to forcefully pry the battery can puncture the lithium-ion cell, causing a short circuit, fire, or chemical leakage, and may also damage the motherboard or chassis. Option C is wrong because heating a lithium-ion battery with a heat gun can cause thermal runaway, leading to swelling, rupture, or explosion; batteries are heat-sensitive and should never be directly heated. Option D is wrong because a suction cup cannot generate enough force to overcome the adhesive bond without risking damage to the battery casing or internal components, and it provides no control over the separation angle.

Full explanation →

729

MCQmedium

A technician is installing a new graphics card that requires additional power. The PSU has a 6+2 pin PCIe power connector. The graphics card has an 8-pin power input. How should the technician connect the power?

A.Connect only the 6-pin portion

B.Use a Molex to 8-pin adapter

C.Attach the 2-pin portion to the 6-pin to make an 8-pin connector

D.Connect a SATA power cable to the card

AnswerC

The 6+2 pin connector is designed to be combined for 8-pin use, providing the correct power.

Why this answer

The 6+2 pin PCIe connector is designed to be used as either a 6-pin or 8-pin by attaching the extra 2-pin section. This tests understanding of modular PSU connectors. Incorrect use of other connectors could damage the card.

Full explanation →

730

MCQmedium

A user reports that a cloud-hosted application is running very slowly during peak hours. The application is hosted on an IaaS platform with a single virtual machine. Which of the following is the most likely cause?

A.The user's internet connection is saturated

B.The virtual machine is under-provisioned for the current workload

C.The cloud provider is experiencing a regional outage

D.The application's power supply is failing

AnswerB

Under-provisioning means the VM lacks enough CPU or RAM to handle peak demand, causing slowdowns.

Why this answer

In IaaS, performance issues during peak hours often indicate that the virtual machine lacks sufficient resources (CPU, RAM) to handle increased load. Scaling up the VM or adding more instances can resolve this. Other factors like local internet or power are less likely to be the primary cause.

Full explanation →

731

MCQhard

A network administrator is troubleshooting a connectivity issue between two servers. Server A has IP 192.168.10.25/25, and Server B has IP 192.168.10.200/25. Server A can ping its default gateway (192.168.10.1) but cannot ping Server B. What is the most likely cause?

A.Server A has a duplicate IP address.

B.The subnet mask is incorrect on one of the servers.

C.The servers are on different subnets and require a router to communicate.

D.The default gateway is misconfigured.

AnswerC

With a /25 mask, 192.168.10.25 is in the 0-126 range, and 192.168.10.200 is in the 128-254 range, placing them on different subnets.

Why this answer

Server A (192.168.10.25/25) has a subnet mask of 255.255.255.128, placing it in the 192.168.10.0/25 subnet (range 0–127). Server B (192.168.10.200/25) is in the 192.168.10.128/25 subnet (range 128–255). These are different subnets, so Server A cannot reach Server B directly via Layer 2; a router (or Layer 3 switch) is required to forward traffic between them.

The fact that Server A can ping its default gateway (192.168.10.1) confirms its IP and mask are correctly configured for its own subnet.

Exam trap

Cisco often tests the misconception that a /25 mask is simply a larger subnet that includes all addresses from .0 to .255, when in fact it creates two distinct subnets that require a router to communicate.

How to eliminate wrong answers

Option A is wrong because a duplicate IP address would cause intermittent connectivity or address conflict errors, not a consistent inability to ping Server B while still being able to ping the default gateway. Option B is wrong because both servers use the same /25 mask (255.255.255.128), so the mask is consistent; the issue is that the mask itself divides the /24 network into two subnets, separating the servers. Option D is wrong because Server A can successfully ping its default gateway (192.168.10.1), proving the gateway is reachable and correctly configured; the problem is that Server A has no route to Server B's subnet.

Full explanation →

732

MCQeasy

During a network upgrade, a new switch is installed. After connecting all devices, one workstation cannot obtain an IP address via DHCP, while all other workstations on the same switch work fine. What is the first step to troubleshoot this issue?

A.Replace the network cable.

B.Check if the network cable is securely connected and the link lights are on.

C.Restart the DHCP service on the router.

D.Assign a static IP address to the workstation.

AnswerB

This is the simplest first step to rule out a physical layer issue, which is a common cause for a single device failure.

Why this answer

When a single workstation fails to get an IP address but others succeed, the problem is likely with that workstation or its cable. Checking the physical connection is the quickest and easiest first step before moving to software or configuration checks.

Full explanation →

733

MCQhard

A technician is configuring a new satellite internet connection for a rural home. After aligning the dish, the modem shows 'online' but the user cannot browse the web. What is the most likely cause?

A.The dish is not aligned properly.

B.The router's MTU setting is too high.

C.The modem's firmware is outdated.

D.The user's browser is incompatible.

AnswerB

Satellite connections require a lower MTU (e.g., 1400) to avoid fragmentation; a default MTU of 1500 can cause connectivity issues.

Why this answer

The modem shows 'online', indicating the satellite link is established, but the user cannot browse the web. This points to a Layer 3 or Layer 4 issue rather than a physical alignment problem. Satellite internet often uses a high MTU (e.g., 1500 bytes), but the link may have a lower effective MTU due to encapsulation overhead (e.g., PPPoE or VPN).

If the router's MTU is set too high, packets larger than the path MTU will be fragmented or dropped, causing web pages to fail to load while the modem remains online.

Exam trap

Cisco often tests the misconception that an 'online' status guarantees full internet connectivity, when in reality it only confirms Layer 1 and Layer 2 synchronization, leaving higher-layer issues like MTU misconfiguration as the hidden culprit.

How to eliminate wrong answers

Option A is wrong because the modem shows 'online', which indicates the dish is aligned properly and the satellite signal is being received; misalignment would prevent the modem from reaching an online state. Option C is wrong because outdated modem firmware typically causes connectivity drops, slow speeds, or failure to sync, not a scenario where the modem shows online but web browsing fails. Option D is wrong because browser incompatibility is extremely rare and would not prevent all web browsing; it would manifest as rendering issues or specific site errors, not a complete inability to browse.

Full explanation →

734

MCQhard

A technician is troubleshooting a color laser printer that prints documents with a yellow tint on all pages. The yellow toner cartridge is full, and the other colors are at normal levels. Which component is the most likely cause?

A.The fuser assembly is overheating.

B.The yellow toner cartridge's shutter is stuck open.

C.The printer's color calibration is incorrect.

D.The printer driver is set to grayscale.

AnswerB

A stuck shutter allows toner to continuously deposit on the drum, causing a yellow tint on every page.

Why this answer

A yellow tint across all pages suggests the yellow toner is being applied continuously. This could be due to a faulty yellow toner cartridge that leaks toner, or a stuck shutter. In some cases, the imaging drum for yellow may be damaged, but the cartridge itself is the first suspect.

Full explanation →

735

MCQmedium

A user reports that their multifunction printer is producing prints with faint, streaky text. The printer uses a toner cartridge and has been in service for two years. The technician has already run a cleaning cycle. What should the technician check next?

A.Replace the fuser assembly

B.Check the toner cartridge level

C.Update the printer firmware

D.Inspect the transfer roller

AnswerB

Low toner is a common cause of faint, streaky prints; replacing or refilling the cartridge often resolves the issue.

Why this answer

This question tests troubleshooting of laser printer print quality issues. Faint, streaky text often indicates a low toner cartridge, especially after a cleaning cycle didn't help. The imaging drum or fuser could also be culprits, but checking toner level is the simplest next step.

Full explanation →

736

MCQhard

A technician is called to a site where a large format plotter is producing prints with banding (horizontal lines of varying density). The plotter uses dye-sublimation ink. The technician has already cleaned the printhead and run a nozzle check, but the issue persists. What should the technician check next?

A.Replace the ink cartridges.

B.Check the media advance rollers for wear or slippage.

C.Update the printer driver.

D.Replace the fuser assembly.

AnswerB

Worn or slipping advance rollers cause inconsistent paper movement, leading to banding even with good printheads.

Why this answer

Banding in dye-sublimation printers can be caused by inconsistent media advance, a failing printhead, or clogged ink lines. Since cleaning the printhead didn't help, the next step is to check the media advance mechanism, such as the rollers or encoder strip, which controls paper movement.

Full explanation →

737

MCQhard

You are troubleshooting a network where users in one department cannot reach a critical server. You need to check if the server's IP address is reachable and measure the round-trip time. Which command-line tool provides this information?

A.ping

B.tracert

C.nslookup

D.netstat

AnswerA

Ping tests connectivity to a host by sending packets and measuring the time it takes to receive a reply.

Why this answer

The `ping` command uses ICMP Echo Request and Echo Reply messages to test reachability of a target IP address and measures the round-trip time (RTT) in milliseconds. This directly matches the requirement to check if the server's IP address is reachable and to measure the RTT.

Exam trap

The trap here is that candidates often confuse tracert with ping, thinking tracert also provides reachability and RTT to the final destination, but tracert focuses on hop-by-hop path discovery and only shows RTT per hop, not a single end-to-end RTT measurement.

How to eliminate wrong answers

Option B (tracert) is wrong because it traces the route packets take to a destination by incrementing the TTL value, showing each hop's IP address and RTT, but it does not simply test reachability and RTT to the final destination in a single-shot manner like ping. Option C (nslookup) is wrong because it queries DNS servers to resolve domain names to IP addresses or vice versa, and does not test network-layer reachability or measure RTT. Option D (netstat) is wrong because it displays active network connections, routing tables, and interface statistics, but it does not send probe packets to test reachability of a remote IP address.

Full explanation →

738

MCQeasy

A technician needs to boot a laptop from a USB drive to run a diagnostic tool. The USB is plugged in but the system skips it and boots from the internal SSD. Which UEFI setting is most likely preventing the USB boot?

A.Disable Secure Boot

B.Enable Fast Boot

C.Set SATA mode to RAID

D.Disable the TPM

AnswerA

Secure Boot can prevent booting from unsigned media like many diagnostic USBs.

Why this answer

If Secure Boot is enabled and the USB is not signed or UEFI-bootable, the system may ignore it. Alternatively, the boot order may not include USB. This tests understanding of boot security and order settings.

Full explanation →

739

MCQmedium

A user reports that their PC powers on for a second then immediately shuts off. This repeats in a loop. What is the most likely hardware issue?

A.Defective CPU

B.Incorrectly installed motherboard standoffs causing a short

C.Overheated GPU

D.Corrupted BIOS

AnswerB

Extra or misplaced standoffs can create a short circuit, causing the system to power on briefly then shut off to protect components.

Why this answer

The power-on-then-off loop is a classic symptom of a short circuit or power issue, often caused by a loose standoff, improperly seated component, or a failing power supply. The most common cause is a short to ground from a motherboard standoff in the wrong location.

Full explanation →

740

MCQhard

A technician is installing a new network in a school and must run cables through air handling plenums. What type of cable jacket is required for this installation?

A.PVC jacket

B.Plenum-rated jacket

C.Shielded jacket

D.Riser-rated jacket

AnswerB

Plenum-rated cables are designed for use in air plenums and meet fire safety codes.

Why this answer

Plenum-rated jackets are required for cables installed in air handling plenums because they are made of low-smoke, low-flame materials (such as FEP or PFA) that do not emit toxic fumes or support combustion in the event of a fire. This complies with fire safety codes like the National Electrical Code (NEC) Article 725 and ensures that the air circulation system does not spread smoke or flames throughout the building.

Exam trap

The trap here is that candidates often confuse 'plenum-rated' with 'riser-rated' or assume that shielding (e.g., STP) provides fire protection, when in fact the jacket rating is solely about fire safety and smoke emission, not signal integrity or physical protection.

How to eliminate wrong answers

Option A is wrong because PVC (polyvinyl chloride) jackets produce dense, toxic smoke and can drip burning material when heated, making them unsafe for plenum spaces where air circulates. Option C is wrong because a shielded jacket refers to electromagnetic interference (EMI) protection (e.g., foil or braid shielding), not fire resistance; shielding does not address the fire code requirements for plenum installations. Option D is wrong because riser-rated jackets (CMR) are designed for vertical runs between floors and offer some fire resistance, but they do not meet the stricter low-smoke, low-flame standards required for plenum spaces.

Full explanation →

741

MCQhard

A technician needs to deploy a virtual machine that will be used for a short-term project and then deleted. The VM must not consume excessive storage space initially. Which virtual disk type should be chosen?

A.Fixed-size (thick) virtual disk

B.Differencing disk

C.Thin-provisioned virtual disk

D.Dynamic expanding disk

AnswerC

Thin provisioning allocates only the space used, conserving storage for short-term VMs.

Why this answer

Thin provisioning allocates disk space on demand, starting small and growing as needed. This is ideal for temporary VMs to minimize initial storage usage.

Full explanation →

742

MCQmedium

A company's network uses a router with a built-in 4-port switch. The IT manager wants to segment the network into two separate broadcast domains for security. What additional hardware is required?

A.A second router

B.A managed switch

C.A hub

D.A wireless access point

AnswerB

Correct. A managed switch allows configuration of VLANs, which logically separate broadcast domains on the same physical network, improving security.

Why this answer

A managed switch is required because it can be configured with VLANs (IEEE 802.1Q) to create multiple broadcast domains on a single physical switch. The built-in 4-port switch on the router cannot be segmented into separate broadcast domains without VLAN support, which only a managed switch provides.

Exam trap

The trap here is that candidates assume a router is always needed to create separate broadcast domains, but the CompTIA A+ exam tests that a managed switch with VLANs can do this at Layer 2 without additional routing hardware.

How to eliminate wrong answers

Option A is wrong because a second router would create separate IP subnets and broadcast domains, but it is overkill and not the simplest solution; a managed switch with VLANs can achieve the same goal without adding another routing device. Option C is wrong because a hub operates at Layer 1 and simply repeats all traffic to all ports, so it cannot segment broadcast domains at all. Option D is wrong because a wireless access point bridges wireless clients onto the same broadcast domain as the wired network, providing no segmentation.

Full explanation →

743

MCQmedium

A network administrator is configuring a new firewall to allow remote employees to securely access internal resources. The requirement is to encrypt all traffic between the remote client and the internal network. Which protocol should be used?

A.SSL/TLS

B.IPsec

C.L2TP

D.HTTP

AnswerB

IPsec is a standard protocol suite for secure IP communications by encrypting and authenticating each IP packet in a VPN tunnel.

Why this answer

IPsec is the correct choice because it provides end-to-end encryption at the network layer (Layer 3), securing all IP traffic between a remote client and an internal network. It operates in tunnel mode to encapsulate the entire original IP packet, ensuring confidentiality, integrity, and authentication for remote access VPNs. SSL/TLS operates at the transport layer and is typically used for securing individual application sessions (e.g., HTTPS), not for encrypting all traffic from a remote client to an entire internal network.

Exam trap

A common misconception is that SSL/TLS is sufficient for full network-layer encryption, when in fact it only secures individual application sessions, whereas IPsec is the standard for encrypting all traffic between a remote client and an internal network.

How to eliminate wrong answers

Option A (SSL/TLS) is wrong because it secures only specific application-layer protocols (e.g., HTTPS, LDAPS) and does not provide network-layer encryption for all IP traffic; it is not designed for site-to-site or full-tunnel remote access VPNs. Option C (L2TP) is wrong because it is a tunneling protocol that does not include encryption by itself; it must be combined with IPsec (L2TP/IPsec) to provide confidentiality, and the question explicitly requires encryption. Option D (HTTP) is wrong because it is an unencrypted application-layer protocol used for web traffic and provides no security; it is the opposite of a secure remote access solution.

Full explanation →

744

MCQmedium

During a network upgrade, a technician needs to connect a legacy printer that only has a USB port to the network. The printer is in a location without a nearby computer. Which device should the technician use to enable network printing?

A.USB hub

B.Wireless access point

C.External print server

D.Network switch

AnswerC

An external print server has a USB port to connect the printer and an Ethernet port to connect to the network, enabling network printing.

Why this answer

A print server is designed to connect a USB printer to a network, allowing it to be shared without a dedicated computer. A USB hub would not provide network connectivity, and a wireless bridge could work but is less direct. The correct answer is an external print server.

Full explanation →

745

MCQmedium

A user's smartphone can send and receive text messages but cannot access the internet over cellular data. Wi-Fi internet works fine. Which setting is most likely misconfigured?

A.The Wi-Fi hotspot is enabled.

B.The APN settings are incorrect.

C.Bluetooth is turned on.

D.The device is in roaming mode.

AnswerB

APN (Access Point Name) settings are required for cellular data. If misconfigured, data will not work, but SMS and calls may still function.

Why this answer

The APN (Access Point Name) defines the gateway between the mobile network and the internet. If the APN settings are incorrect or missing, the device can still register on the cellular network for voice and SMS (which use the control plane) but cannot establish a data session (user plane) because the packet data network gateway cannot be reached. Wi-Fi internet works fine because it bypasses the cellular data path entirely.

Exam trap

The 220-1201 exam often tests the APN setting as the root cause for 'SMS works, no cellular data' because many candidates mistakenly think SMS and data use the same network path, but SMS uses the signaling channel (SS7/IMS) while data requires a separate PDP context through the APN.

How to eliminate wrong answers

Option A is wrong because enabling the Wi-Fi hotspot would share the device's cellular data connection, not block it; the symptom is that cellular data does not work at all, which is the opposite of a hotspot issue. Option C is wrong because Bluetooth is a short-range personal area network technology used for peripherals and file transfers, not for internet connectivity; turning Bluetooth on or off has no effect on cellular data access. Option D is wrong because roaming mode affects how the device connects to foreign networks when outside the home coverage area; if the device is not roaming (i.e., on its home network), this setting is irrelevant, and even when roaming, it would not prevent SMS while blocking data—roaming typically affects data, voice, and SMS together or not at all.

Full explanation →

746

MCQmedium

A company is expanding its office to a new building 5 kilometers away and needs to connect the two LANs so employees can share files and access the same servers as if they were in one location. They want a dedicated, high-speed connection without using the public internet. Which network type should be implemented?

A.Local Area Network (LAN)

B.Wide Area Network (WAN)

C.Metropolitan Area Network (MAN)

D.Personal Area Network (PAN)

AnswerC

A MAN is ideal for connecting multiple LANs within a city, providing high-speed dedicated links over distances like 5 km.

Why this answer

A Metropolitan Area Network (MAN) is designed to interconnect multiple LANs across a city or metropolitan region, typically up to 50 km, using dedicated fiber optic links such as Metro Ethernet or SONET/SDH. This provides the high-speed, private connection required without traversing the public internet, making it ideal for connecting two offices 5 km apart.

Exam trap

Cisco often tests the distinction between MAN and WAN based on geographic scope; the trap here is that candidates see 'connecting two LANs' and immediately think WAN, ignoring that the 5 km distance fits the MAN definition, which is a specific exam objective for 220-1201.

How to eliminate wrong answers

Option A is wrong because a Local Area Network (LAN) is confined to a single building or campus (typically up to 100 meters with copper cabling) and cannot span 5 km between separate buildings. Option B is wrong because a Wide Area Network (WAN) is designed for long-distance connections across cities, countries, or continents, often using leased lines or MPLS, but it is overkill and not the most appropriate term for a metropolitan-scale link; the question specifies a 5 km distance, which falls under MAN scope. Option D is wrong because a Personal Area Network (PAN) covers only a few meters (e.g., Bluetooth or USB) and is entirely unsuitable for connecting two office LANs.

Full explanation →

747

MCQmedium

A thermal printer used for shipping labels is producing faint, hard-to-read labels. The printer has plenty of thermal paper loaded. What is the most likely cause?

A.The paper is upside down

B.The printhead is dirty or worn

C.The printer driver is incorrect

D.The paper is expired

AnswerB

Dirt or wear on the printhead reduces heat transfer, causing faint labels.

Why this answer

Thermal printers rely on the printhead heating the paper. Faint output usually indicates a dirty or worn printhead. Cleaning the printhead with a thermal cleaning pen or alcohol swab often restores clarity.

If the printhead is worn, replacement may be needed.

Full explanation →

748

MCQeasy

A user complains that their external USB hard drive is making a clicking sound and is no longer recognized by any computer. What is the most likely cause?

A.The USB cable is damaged.

B.The drive has suffered a logical failure.

C.The drive's enclosure is faulty.

D.The drive has experienced a mechanical failure.

AnswerD

Clicking sounds are a hallmark of mechanical failure, such as a head crash or spindle motor issue, requiring professional data recovery or replacement.

Why this answer

Clicking sounds from a hard drive typically indicate a mechanical failure, such as a stuck read/write head or damaged platters. This is a classic sign of a failing drive, not a software or connection issue.

Full explanation →

749

MCQmedium

A technician is troubleshooting a VoIP phone that cannot register with the call server. The phone has a valid IP address and can ping the call server by IP. Which protocol is most likely not functioning correctly?

A.SIP

B.RTP

C.DHCP

D.DNS

AnswerA

SIP is used to register VoIP phones with the call server; if SIP is blocked or misconfigured, registration fails.

Why this answer

The phone has a valid IP address and can ping the call server by IP, which confirms that Layer 3 connectivity and DHCP are working. However, the phone cannot register with the call server, which requires the Session Initiation Protocol (SIP) to exchange registration messages (REGISTER request and 200 OK response). If SIP is misconfigured, blocked by a firewall, or the SIP proxy is unreachable, registration will fail even though basic IP connectivity exists.

Exam trap

A common pitfall on the CompTIA A+ exam is confusing Layer 3 reachability (ping) with application-layer registration (SIP). Candidates may incorrectly suspect DHCP or DNS when the real issue is a misconfigured or blocked SIP protocol.

How to eliminate wrong answers

Option B (RTP) is wrong because RTP is used for transporting actual voice media after a call is established, not for the registration process. Option C (DHCP) is wrong because the phone already has a valid IP address, indicating DHCP successfully provided an IP configuration. Option D (DNS) is wrong because the phone can ping the call server by IP address, so name resolution is not required for this test; DNS would only be needed if the phone were using a hostname to reach the server.

Full explanation →

750

MCQmedium

A technician is installing a new thermal printer for a retail point-of-sale system. After connecting the printer and installing the driver, the printer prints garbled characters and random symbols. What is the most likely cause?

A.The thermal paper is loaded upside down

B.The printer driver is incorrect for the model

C.The printhead is dirty

D.The printer is out of paper

AnswerB

Using a driver designed for a different printer model can cause the printer to receive commands it cannot interpret, resulting in garbled output.

Why this answer

Garbled characters or random symbols often indicate a driver mismatch or incorrect printer language setting. Thermal printers typically use ESC/POS or similar commands. Installing the wrong driver or having the communication settings (baud rate, parity) misconfigured can cause the printer to misinterpret data.

Full explanation →

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