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CompTIA A+ Core 1 220-1201 (220-1201) — Questions 1–75

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

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1
MCQeasy

During a site survey, a technician finds that users in the break room experience very slow Wi-Fi while those in offices nearby have excellent speeds. What is the most likely cause?

A.The access point in the break room is overheating.
B.Users in the break room are connecting to a 5 GHz network with poor range.
C.A microwave oven in the break room is causing interference.
D.The break room has too many walls blocking the signal.
AnswerC

Correct. Microwave ovens emit strong 2.4 GHz signals that disrupt Wi-Fi.

Why this answer

This scenario tests knowledge of wireless interference sources. Microwaves operate at 2.4 GHz, which is the same frequency band used by many Wi-Fi networks, causing significant interference and performance degradation.

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2
MCQhard

A user wants to connect their smartphone to a car's stereo system that only has an auxiliary input (3.5mm jack). The smartphone has a USB-C port and no headphone jack. Which accessory is required?

A.A USB-C to USB-A cable.
B.A Bluetooth FM transmitter.
C.A USB-C to 3.5mm adapter.
D.A 3.5mm extension cable.
AnswerC

This adapter plugs into the phone's USB-C port and provides a 3.5mm jack that can connect to the car's auxiliary input.

Why this answer

The car stereo only has a 3.5mm auxiliary input, so the smartphone's audio output must be converted to analog audio. A USB-C to 3.5mm adapter contains a digital-to-analog converter (DAC) that converts the smartphone's digital audio signal into an analog signal that the car stereo can accept through the 3.5mm jack.

Exam trap

The 220-1201 exam often tests the misconception that a simple cable (like a USB-C to USB-A or a 3.5mm extension) can carry analog audio, when in fact the absence of a headphone jack requires an adapter with an integrated DAC to convert digital signals to analog.

How to eliminate wrong answers

Option A is wrong because a USB-C to USB-A cable provides power and data transfer, not analog audio output, and the car stereo's auxiliary input expects an analog audio signal, not USB data. Option B is wrong because a Bluetooth FM transmitter would require the smartphone to have Bluetooth capability (which it does) and the car to have an FM radio, but the question specifies the stereo only has an auxiliary input, making an FM transmitter unnecessary and adding complexity without solving the direct wired connection need. Option D is wrong because a 3.5mm extension cable requires both ends to be 3.5mm jacks, but the smartphone has no headphone jack, so the extension cable cannot connect to the smartphone at all.

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3
MCQmedium

A company is deploying VoIP phones and needs a connection with low latency and consistent speeds. They are choosing between cable broadband and fiber-optic. Which factor makes fiber the better choice?

A.Fiber has higher download speeds
B.Fiber is less prone to electromagnetic interference
C.Fiber provides symmetrical upload and download speeds
D.Fiber is cheaper than cable
AnswerC

Symmetrical speeds and low latency ensure clear VoIP calls without jitter.

Why this answer

Fiber-optic connections use separate strands for upstream and downstream data, enabling symmetrical speeds. For VoIP, this ensures consistent upload bandwidth for voice packets, which is critical for low latency and jitter. Cable broadband (DOCSIS) typically has asymmetric speeds due to shared upstream channels, making fiber the better choice for real-time voice traffic.

Exam trap

CompTIA A+ tests the misconception that low latency is primarily about download speed or interference immunity, but the real trap is that VoIP requires symmetrical upload/download speeds to maintain consistent voice quality, which fiber provides inherently.

How to eliminate wrong answers

Option A is wrong because while fiber can offer higher download speeds, the question specifically prioritizes low latency and consistent speeds for VoIP, not raw download throughput. Option B is wrong because although fiber is less prone to EMI, this is a general advantage but not the primary factor for VoIP's need for symmetrical speeds; cable's EMI susceptibility is mitigated by proper shielding and does not directly cause latency or inconsistency. Option D is wrong because fiber is generally more expensive to deploy than cable, not cheaper, making this factually incorrect.

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4
MCQmedium

A technician is troubleshooting a desktop that fails to boot and emits three long beeps from the motherboard speaker. The power supply fan spins, and the CPU fan spins, but there is no display output. What is the most likely cause of this issue?

A.The CPU has failed.
B.The video card is not seated correctly.
C.The RAM is not detected or is faulty.
D.The power supply is not providing enough power.
AnswerC

Three long beeps are a standard AMI BIOS beep code for a memory error, indicating the motherboard cannot detect or communicate with the RAM.

Why this answer

Three long beeps from a motherboard typically indicate a memory error, often that no RAM is detected or the RAM is faulty. The fact that other components power on suggests the issue is isolated to the memory subsystem.

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5
MCQeasy

A technician is building a workstation for video editing and needs to install two M.2 NVMe SSDs. The motherboard has one M.2 slot that supports both SATA and NVMe, and another that supports only SATA. When the technician installs both drives, only the NVMe drive is detected. What is the most likely reason?

A.The NVMe drive is not properly seated.
B.The second M.2 slot only supports SATA SSDs, not NVMe.
C.The BIOS needs to be updated.
D.The SATA SSD is defective.
AnswerB

Correct. Many motherboards have M.2 slots limited to SATA; NVMe drives require PCIe lanes.

Why this answer

M.2 slots can have different interface support. If one slot only supports SATA, an NVMe SSD will not be recognized. This tests knowledge of M.2 slot compatibility.

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6
MCQhard

A technician is troubleshooting a network where users on one floor cannot access a server on another floor. Both floors are connected via a single fiber optic link. The technician checks the link and sees the switch port shows 'err-disabled' status. What is the most likely cause of this state?

A.The fiber cable is damaged
B.A duplex mismatch exists between the switches
C.Port security has been violated
D.The VLAN configuration is incorrect
AnswerC

Port security violations, such as exceeding the maximum MAC addresses, cause the switch to disable the port and place it in err-disabled state.

Why this answer

The 'err-disabled' state on a switch port is commonly triggered by a port security violation. When a device attempts to connect with a MAC address that exceeds the configured maximum or is not on the allowed list, the switch disables the port to prevent unauthorized access. This matches the scenario where users on one floor cannot reach a server, as the link is physically intact but logically blocked.

Exam trap

Cisco often tests the distinction between physical link issues (cable damage, duplex mismatch) and software-induced states like 'err-disabled', where candidates mistakenly attribute the state to hardware faults rather than security or error-disable mechanisms.

How to eliminate wrong answers

Option A is wrong because a damaged fiber cable would typically cause the port to show 'down/down' or link flapping, not 'err-disabled', which is a software-enforced state. Option B is wrong because a duplex mismatch causes excessive CRC errors and collisions, leading to 'down/down' or performance issues, but not the 'err-disabled' state; 'err-disabled' is triggered by security or error-disable recovery features, not duplex negotiation. Option D is wrong because an incorrect VLAN configuration would result in connectivity issues (e.g., traffic not reaching the correct VLAN) but the port would remain up/up; 'err-disabled' is not caused by VLAN misconfiguration.

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7
MCQmedium

A marketing team uses tablets to capture customer signatures on glass screen protectors. They report that the capacitive stylus often skips or fails to register strokes near the edges of the screen. After testing, you find the issue persists even without the protector. Which accessory should you recommend to improve stylus precision?

A.A tempered glass screen protector with an oleophobic coating
B.A Bluetooth keyboard
C.A fine-tip active stylus
D.A different passive capacitive stylus with a larger tip
AnswerC

Active styluses communicate with the device's digitizer for greater precision, reducing skipping and edge inaccuracies.

Why this answer

The issue persists without the screen protector, ruling out the protector as the cause. A fine-tip active stylus (Option C) uses a digitizer and Bluetooth or proprietary protocol to communicate with the tablet, providing precise edge-to-edge tracking. Passive capacitive styluses rely on the finger's electrical field and often fail near edges due to reduced capacitive coupling, making an active stylus the correct solution.

Exam trap

CompTIA often tests the misconception that a screen protector is the root cause of touch issues, leading candidates to choose a replacement protector (Option A) instead of recognizing the fundamental difference between passive and active stylus technology.

How to eliminate wrong answers

Option A is wrong because a tempered glass screen protector with an oleophobic coating does not improve stylus precision; it only adds scratch resistance and reduces fingerprints, and the problem persists without it. Option B is wrong because a Bluetooth keyboard is an input device for text entry, not for stylus-based signature capture, and does not affect touch or stylus tracking. Option D is wrong because a passive capacitive stylus with a larger tip would actually reduce precision near edges, as the larger tip further degrades capacitive coupling at the screen's periphery, worsening the skipping issue.

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8
MCQhard

A technician is troubleshooting a VoIP phone that intermittently drops calls. The phone uses SIP (Session Initiation Protocol) for signaling and RTP (Real-time Transport Protocol) for audio. Which ports are typically used by these protocols?

A.SIP: 5060, RTP: 16384-32767
B.SIP: 80, RTP: 443
C.SIP: 1720, RTP: 5060
D.SIP: 443, RTP: 80
AnswerA

SIP uses port 5060 for signaling, and RTP uses a dynamic UDP range for audio.

Why this answer

SIP typically uses port 5060 (UDP or TCP) for signaling, and RTP uses a range of UDP ports (often 16384-32767) for audio streams. Port 80 is HTTP, port 443 is HTTPS, and port 1720 is H.323 (another VoIP protocol).

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9
MCQeasy

A technician is configuring a new workstation for video editing. The user needs fast read/write speeds for large project files. Which storage technology should be selected for the primary drive?

A.2.5-inch SATA SSD
B.NVMe M.2 SSD
C.10,000 RPM HDD
D.Hybrid drive (SSHD)
AnswerB

NVMe SSDs provide the highest throughput and low latency, perfect for large file transfers in video editing.

Why this answer

An NVMe M.2 SSD uses the PCIe interface, offering significantly faster speeds than SATA SSDs or HDDs, ideal for video editing. SATA SSDs are slower, and HDDs are too slow for this workload.

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10
MCQmedium

A customer brings in a smartphone with a broken charging port. They want the port replaced. During disassembly, the technician finds that the charging port is soldered directly to the main board. Which tool is essential for this repair?

A.A heat gun with a narrow nozzle.
B.A soldering iron with a fine tip.
C.A Phillips-head screwdriver.
D.A plastic spudger.
AnswerB

A fine-tip soldering iron allows precise desoldering and soldering of the small pins on the charging port.

Why this answer

Option B is correct because the charging port is soldered directly to the main board, requiring a soldering iron with a fine tip to precisely heat and remove the existing solder joints and then re-solder the new port without damaging nearby components. A fine tip allows controlled heat application on small surface-mount pads, which is essential for this type of micro-soldering repair.

Exam trap

The trap here is that candidates may confuse a heat gun (used for rework of large ICs) with the tool needed for a small soldered component, overlooking the need for precision soldering on a main board.

How to eliminate wrong answers

Option A is wrong because a heat gun with a narrow nozzle is used for reflowing BGA chips or removing large components, not for desoldering a small charging port; its broad heat distribution would risk damaging the main board and nearby components. Option C is wrong because a Phillips-head screwdriver is used for removing screws, not for desoldering or soldering a component that is soldered to the board. Option D is wrong because a plastic spudger is used for prying open casings or disconnecting ribbon cables, not for applying heat or manipulating solder joints.

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11
MCQhard

A technician is configuring a kiosk that uses a tablet to display digital signage. The tablet must be powered continuously and connected to a wired network for reliability. The tablet has a single USB-C port. How should the technician provide both power and network connectivity?

A.Use a USB-C to Ethernet adapter and charge the tablet wirelessly.
B.Connect a USB-C hub that provides both Ethernet and Power Delivery charging.
C.Use a Wi-Fi connection and a standard USB-C charger.
D.Connect the tablet to the network via Bluetooth tethering to a phone.
AnswerB

A USB-C hub with PD pass-through allows the tablet to be charged while using wired Ethernet.

Why this answer

Option B is correct because a USB-C hub with Power Delivery (PD) and Ethernet allows the tablet to receive both power and wired network connectivity through a single USB-C port. USB-C PD supports up to 100W (20V/5A) for charging, while the hub's Ethernet controller provides a stable wired network connection, meeting the requirements for continuous power and reliability.

Exam trap

A common pitfall is assuming a single USB-C port can only handle one function at a time, but USB-C with alternate modes and Power Delivery allows simultaneous data, video, and power over the same port.

How to eliminate wrong answers

Option A is wrong because wireless charging is typically slower and less efficient than wired charging, and it cannot provide continuous power for a kiosk that must run 24/7; also, a USB-C to Ethernet adapter alone does not provide power, so the tablet would need a separate power source. Option C is wrong because Wi-Fi is less reliable than a wired connection for digital signage kiosks, and a standard USB-C charger only provides power without network connectivity. Option D is wrong because Bluetooth tethering to a phone introduces a dependency on another device, reduces network reliability, and does not provide continuous power to the tablet.

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12
MCQeasy

A technician is building a new workstation for a graphic designer. The user needs fast single-threaded performance for Adobe Photoshop. Which CPU characteristic should the technician prioritize?

A.Maximum number of cores
B.Higher clock speed (GHz)
C.Larger L3 cache size
D.Lower TDP
AnswerB

Higher clock speed directly improves single-threaded performance, which is critical for Photoshop's processing.

Why this answer

For applications like Photoshop that rely heavily on single-threaded performance, higher clock speed is more important than core count. This question tests the understanding of CPU performance metrics for specific workloads.

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13
MCQmedium

A user complains that their computer boots slowly and shows a 'Press F1 to continue' message every time. The firmware settings appear to have lost their configuration. What is the most likely cause?

A.The boot order is incorrect
B.The CMOS battery is failing
C.The hard drive is failing
D.The BIOS version is outdated
AnswerB

A dying CMOS battery loses settings on power-off, causing the BIOS to prompt for reconfiguration.

Why this answer

A failing or depleted CMOS battery cannot retain BIOS settings, causing defaults to load and often requiring user intervention at boot. This is a common issue that leads to the 'Press F1' prompt. The question tests understanding of CMOS battery function in maintaining firmware settings.

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14
MCQeasy

A user reports that when they scan a document to email from the office multifunction printer, the email never arrives. The printer shows a 'Connection to SMTP server failed' error. What is the most likely cause?

A.The printer's IP address is set to static.
B.The SMTP server address or port is configured incorrectly.
C.The toner cartridge is low.
D.The printer is out of paper.
AnswerB

Incorrect SMTP server settings prevent the printer from sending email, causing the connection failure.

Why this answer

This question tests knowledge of scan-to-email configuration. The SMTP server address or authentication credentials are the most common issues when a multifunction device cannot send email. Checking the SMTP settings in the printer's network configuration should resolve the problem.

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15
MCQmedium

A technician is troubleshooting a PC that emits a high-pitched whining noise under load. The noise is coming from the power supply area. The system is stable and temperatures are normal. What is the most likely cause?

A.The PSU fan bearing is failing.
B.The PSU is experiencing coil whine due to electrical resonance.
C.The PSU is overheating and the thermal protection is activating.
D.The PSU has a loose internal component rattling.
AnswerB

Coil whine is caused by vibrations in the PSU's inductors under certain electrical loads; it is normal and not a sign of failure.

Why this answer

Coil whine is a common phenomenon in power supplies and other components when electrical current passes through inductors, causing them to vibrate at audible frequencies. It is typically harmless and does not indicate a defect, though it can be annoying. If the system is stable, no replacement is needed.

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16
MCQhard

A technician is troubleshooting a network where users report intermittent connectivity. The technician finds that the switch logs show excessive CRC errors on multiple ports connected to different workstations. What is the most likely cause of these errors?

A.The switch is configured with the wrong VLAN assignments
B.The workstations have duplicate IP addresses
C.The Ethernet cables are run too close to power cables
D.The switch firmware is outdated
AnswerC

Electromagnetic interference from power cables can corrupt data signals, leading to CRC errors on multiple ports.

Why this answer

CRC errors indicate data corruption at the physical layer, typically caused by electromagnetic interference (EMI) from nearby power cables. Running Ethernet cables too close to power cables induces noise, corrupting frames and causing CRC mismatches at the switch port.

Exam trap

CompTIA A+ exams often test the distinction between physical-layer issues (CRC errors, runts, giants) and logical-layer issues (VLAN misconfigurations, IP conflicts), so candidates mistakenly attribute CRC errors to software or configuration problems instead of cabling interference.

How to eliminate wrong answers

Option A is wrong because incorrect VLAN assignments cause connectivity issues like traffic not reaching the correct broadcast domain, but they do not generate CRC errors at the physical layer. Option B is wrong because duplicate IP addresses cause address conflicts and connectivity drops at Layer 3, not physical-layer CRC errors on switch ports. Option D is wrong because outdated switch firmware can cause bugs or performance issues but does not directly cause CRC errors; CRC errors are a physical-layer problem typically linked to cabling or hardware faults.

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17
MCQhard

A technician is configuring a network for a branch office that will use a router to connect to the main office over the internet. The connection must be encrypted and authenticated to ensure data privacy. Which protocol should the technician configure on the router?

A.IPsec
B.SSL/TLS
C.PPTP
D.L2TP
AnswerA

IPsec encrypts and authenticates IP packets, providing a secure tunnel between routers over the internet.

Why this answer

IPsec is the correct protocol because it provides both encryption and authentication at the network layer, making it ideal for securing site-to-site VPN connections over the internet. It ensures data privacy by encrypting the entire IP packet and authenticates the communicating peers using protocols like IKE (Internet Key Exchange). This matches the requirement for a router-to-router connection where all traffic between branch and main office must be protected.

Exam trap

The trap here is that candidates often confuse L2TP with a complete VPN solution, forgetting that L2TP alone provides no encryption and must be paired with IPsec to meet security requirements.

How to eliminate wrong answers

Option B (SSL/TLS) is wrong because it operates at the transport layer and is designed for securing individual application sessions (e.g., HTTPS), not for encrypting all traffic between two routers in a site-to-site VPN. Option C (PPTP) is wrong because it uses MPPE for encryption, which is considered weak and deprecated due to known vulnerabilities, and it lacks strong authentication mechanisms required for modern secure connections. Option D (L2TP) is wrong because it only provides tunneling (encapsulation) without encryption; it must be combined with IPsec (L2TP/IPsec) to achieve the required data privacy and authentication.

Full explanation →
18
MCQmedium

After replacing a motherboard, a technician installs Windows but the system will not boot from the SSD. The drive is detected in UEFI. The technician recalls the previous motherboard used Legacy BIOS. What is the most likely issue?

A.The SSD is not getting power
B.The UEFI is set to UEFI mode but the drive uses MBR
C.Secure Boot is blocking the Windows bootloader
D.The CMOS battery is dead
AnswerB

UEFI requires GPT partition table; MBR drives are only bootable in Legacy/CSM mode.

Why this answer

If the new motherboard defaults to UEFI mode but the SSD was formatted with an MBR partition table (for Legacy), the system cannot boot. Changing to Legacy/CSM mode or reinstalling with GPT is needed. This tests understanding of partition table and boot mode compatibility.

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19
MCQhard

A technician is troubleshooting a desktop that will not boot from a brand new M.2 NVMe SSD. The drive is detected in the BIOS/UEFI, but the system skips it and tries to boot from other devices. The technician has already verified that the drive is properly seated and the BIOS is up to date. What should the technician check next?

A.Check if the SATA controller is set to AHCI mode.
B.Check if the boot mode is set to UEFI and the drive is partitioned with GPT.
C.Check if the M.2 slot is configured to use SATA or PCIe lanes in the BIOS.
D.Check if the drive has been initialized with a Master Boot Record (MBR).
AnswerB

NVMe drives require UEFI boot mode and a GPT partition table. If the system is in legacy BIOS (CSM) mode or the drive is MBR, the system will detect the drive but not boot from it.

Why this answer

This question tests advanced knowledge of UEFI boot settings. When an NVMe drive is detected but not bootable, the issue is often that the drive is not partitioned with a GUID Partition Table (GPT) or that the system is in legacy BIOS (CSM) mode. NVMe drives require UEFI boot mode and a GPT partition table to boot.

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20
MCQmedium

A user complains that their PC sometimes fails to boot and displays a 'CMOS Checksum Error' message. After replacing the CMOS battery, the error persists. What motherboard component should you inspect next?

A.The CPU socket pins
B.The BIOS/UEFI chip
C.The RAM modules
D.The power supply unit
AnswerB

A failing BIOS chip or corrupted firmware can cause persistent checksum errors even with a good battery.

Why this answer

A CMOS checksum error indicates the BIOS settings are corrupted or not being saved. If a new battery doesn't fix it, the CMOS (RTC) chip itself may be failing, or the BIOS/UEFI firmware may need to be reset or updated. This points to a hardware issue on the motherboard beyond the battery.

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21
MCQmedium

During a network security audit, a technician finds that an employee is using a protocol that allows remote control of a computer with full graphical interface but without encryption. Which protocol should be replaced with a more secure alternative?

A.RDP
B.SSH
C.Telnet
D.FTP
AnswerA

RDP allows graphical remote control; if not configured with encryption, it is insecure and should be replaced with an encrypted version or alternative.

Why this answer

RDP (Remote Desktop Protocol) provides full graphical interface remote control but, by default in older versions or misconfigurations, transmits data without encryption, exposing keystrokes, screen content, and credentials to eavesdropping. The secure alternative is to use RDP with TLS/SSL encryption (e.g., via Network Level Authentication) or a VPN, or to replace it with an encrypted remote desktop solution like SSH with X11 forwarding or a modern RDP client enforcing encryption.

Exam trap

Candidates often confuse remote control (graphical) with remote access (command-line) protocols. They may mistakenly choose Telnet because it lacks encryption, forgetting that Telnet provides only text-based remote access, not full graphical interface.

How to eliminate wrong answers

Option B (SSH) is wrong because SSH provides encrypted remote shell access and can tunnel graphical sessions via X11 forwarding, but the question describes a protocol that offers full graphical interface without encryption, which is not SSH's native behavior. Option C (Telnet) is wrong because Telnet provides unencrypted remote command-line access, not a full graphical interface. Option D (FTP) is wrong because FTP is a file transfer protocol, not a remote control protocol, and while it can be unencrypted, it does not provide graphical remote desktop functionality.

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22
MCQmedium

A technician is troubleshooting a workstation that randomly crashes and shows memory errors in Windows. The system has four 4 GB DDR4 modules. The technician runs Memtest86 and finds errors in one module. What should the technician do to resolve the issue while maximizing performance?

A.Remove the faulty module and leave the other three installed.
B.Replace the faulty module with a new module of the same specifications.
C.Remove all modules and install a single 16 GB module.
D.Remove the faulty module and the module in the same channel to keep dual-channel.
AnswerB

This restores full capacity and dual-channel operation, maximizing performance.

Why this answer

The faulty module should be removed, but to maintain dual-channel performance, the remaining modules should be installed in matched pairs. Removing one module leaves three, which may force single-channel operation. The best solution is to replace the faulty module with a matching one, but if not available, removing two modules to keep a matched pair is optimal.

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23
MCQeasy

A user reports that their PC boots to a black screen with a blinking cursor after installing a new SATA SSD. The old hard drive is still connected. What is the most likely issue?

A.The new SSD is defective
B.The boot order in BIOS is incorrect
C.The SATA cable is loose
D.The power supply is insufficient
AnswerB

If the new SSD has no OS and is set as first boot, or the old drive is set first but has a corrupted boot sector, the system hangs. Checking BIOS boot order is the correct step.

Why this answer

The blinking cursor on a black screen usually indicates the system cannot find a bootable device. With two drives connected, the boot order in the BIOS may be set to the old hard drive or the new SSD may not have an OS installed.

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24
MCQmedium

A user reports that their laser printer prints a 'PC LOAD LETTER' error message. The paper tray is full of A4 paper. What should the technician do to resolve the issue?

A.Replace the toner cartridge.
B.Change the paper size setting in the printer driver to A4.
C.Clean the paper pickup rollers.
D.Update the printer firmware.
AnswerB

Matching the driver setting to the actual paper in the tray resolves the mismatch error.

Why this answer

The 'PC LOAD LETTER' error indicates the printer expects letter-size paper but the tray is loaded with A4. The solution is to either change the paper size setting in the printer driver or load letter-size paper, depending on the user's needs.

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25
MCQmedium

A technician is troubleshooting a PC that powers on for a few seconds then shuts off. The technician removes the 24-pin connector and jumps the green wire to a black wire; the PSU fan spins and stays on. What does this indicate?

A.The power supply is definitely faulty and should be replaced.
B.The motherboard has a short circuit causing the PSU to shut down.
C.The CPU is overheating and triggering thermal shutdown.
D.The power supply fan is defective, causing it to overheat and shut off.
AnswerB

The PSU works when isolated, so a short on the motherboard or a connected component is likely triggering overcurrent protection.

Why this answer

The paperclip test confirms the PSU can power on independently. If the fan runs continuously, the PSU is likely functional. The issue is probably elsewhere, such as a short on the motherboard or a faulty component drawing too much power.

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26
MCQhard

A technician is setting up a new wireless network in a crowded office building. Users report that their laptops frequently disconnect from the Wi-Fi and have slow speeds, even when close to the access point. The technician scans the area and sees many overlapping Wi-Fi networks. What is the best solution to improve performance?

A.Increase the transmit power of the access point.
B.Change the access point to a less congested channel.
C.Disable SSID broadcast to hide the network.
D.Replace the access point with a higher-gain antenna model.
AnswerB

Using a channel with less overlap reduces interference, improving connection stability and speed in crowded environments.

Why this answer

In a dense environment with many overlapping networks, channel congestion is a major cause of interference and disconnections. Changing the access point to a less congested channel reduces co-channel interference and improves stability and throughput.

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27
MCQeasy

A user reports that their iPhone 12 will not turn on after being left in a hot car for several hours. The device feels warm, and pressing the power button does nothing. What is the most likely cause of the device not powering on?

A.The battery has expanded due to heat and disconnected from the logic board
B.The device's logic board has been permanently damaged by heat
C.The device entered a thermal shutdown state to protect internal components
D.The power button is stuck due to heat expansion
AnswerC

iPhones have thermal sensors that trigger a shutdown when internal temperatures exceed safe limits. Once cooled, the device should power on normally.

Why this answer

Excessive heat can trigger thermal protection circuits in modern smartphones, causing them to shut down and refuse to power on until they cool down. This is a safety feature to prevent battery or component damage. The correct answer identifies thermal shutdown as the cause.

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28
MCQmedium

A user reports that they cannot access a cloud-based CRM application from their office, but they can access it from home. The technician checks the office firewall and finds that outbound HTTPS traffic is allowed. What should the technician investigate next?

A.The user's browser cache
B.The cloud provider's service status
C.DNS resolution for the CRM's domain
D.The user's account permissions
AnswerC

If DNS is blocked or misconfigured in the office, the browser cannot resolve the CRM's IP address, even though outbound HTTPS is allowed.

Why this answer

If outbound HTTPS is allowed, the issue may be with DNS resolution, which can be blocked or misconfigured by the office network. The CRM's domain name might not resolve correctly, preventing the connection. The technician should test DNS resolution for the CRM's URL.

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29
MCQmedium

A technician is troubleshooting a tablet that can connect to Bluetooth headphones but cannot connect to a Bluetooth keyboard. The keyboard is known to work with other devices. What should the technician check first?

A.Ensure the tablet's Bluetooth is turned on.
B.Check if the keyboard is in pairing mode.
C.Update the tablet's operating system.
D.Reset the tablet's network settings.
AnswerB

Many Bluetooth keyboards require a button press to enter pairing mode. If not in pairing mode, the tablet cannot discover it.

Why this answer

The keyboard is known to work with other devices, so the issue is likely that it is not in pairing mode. Bluetooth keyboards require a specific pairing mode (often initiated by holding a key combination) to be discoverable by the tablet. The technician should verify this first before exploring more complex troubleshooting steps.

Exam trap

The trap here is that candidates assume a Bluetooth connectivity problem must be a radio or software issue, overlooking the simple requirement that the peripheral must be placed into a specific pairing mode to be discovered.

How to eliminate wrong answers

Option A is wrong because the tablet can already connect to Bluetooth headphones, which proves Bluetooth is turned on and functional. Option C is wrong because updating the OS is a more invasive step and is not indicated when the tablet connects to other Bluetooth devices without issue. Option D is wrong because resetting network settings would erase all Wi-Fi and Bluetooth pairings and is a last-resort step, not the first check when the keyboard simply may not be in pairing mode.

Full explanation →
30
MCQeasy

A company deploys tablets for field workers to capture signatures on glass screens using a capacitive stylus. Several workers complain that the stylus does not register consistently. What is the most likely cause?

A.The screen protector is too thick.
B.The stylus tip is not conductive.
C.The tablet's touch calibration is off.
D.The workers are pressing too lightly.
AnswerB

Capacitive screens rely on electrical conductivity; a non-conductive stylus tip will not be detected.

Why this answer

Capacitive styluses work by transferring a small electrical charge from the user's hand through the conductive tip to the touchscreen, mimicking a finger's touch. If the tip is not conductive, it cannot complete the capacitive coupling, causing inconsistent or no registration. This is the most likely cause given the specific use case of signature capture on glass screens.

Exam trap

The 220-1201 exam often tests the misconception that pressure or calibration is the primary factor in capacitive touch issues, when in fact the core requirement is conductivity for capacitive coupling.

How to eliminate wrong answers

Option A is wrong because while a very thick screen protector can reduce touch sensitivity, modern capacitive screens and styluses are designed to work with standard protectors; the issue is specific to the stylus tip, not the protector. Option C is wrong because touch calibration issues typically affect all touch inputs uniformly, not just a single stylus, and modern tablets rarely require manual calibration. Option D is wrong because capacitive touchscreens detect the electrical field disturbance, not pressure; pressing lightly with a conductive tip still registers, while pressing hard with a non-conductive tip will not.

Full explanation →
31
MCQeasy

A user complains that their laser printer is printing blank pages. The printer has toner, and the paper feeds correctly. Which component should the technician inspect first?

A.The fuser assembly.
B.The toner cartridge.
C.The pickup rollers.
D.The network cable.
AnswerB

A toner cartridge with a closed shutter or damaged drum prevents toner from transferring to the paper.

Why this answer

Blank pages from a laser printer with toner usually indicate the toner cartridge's shutter is closed or the drum is not making contact. The toner cartridge is the most common cause and should be inspected first.

Full explanation →
32
MCQmedium

A technician is configuring a mobile hotspot on a smartphone to provide internet access to a laptop. The laptop connects to the hotspot's Wi-Fi network but cannot access the internet. The smartphone has a cellular data connection. Which of the following should the technician check first?

A.The laptop's IP address configuration
B.The smartphone's mobile data is enabled
C.The laptop's firewall settings
D.The smartphone's Wi-Fi is turned on
AnswerB

The hotspot uses the phone's cellular data; if mobile data is off, the hotspot has no internet to share.

Why this answer

Mobile hotspots require cellular data to be enabled; if data is off, the hotspot broadcasts a Wi-Fi signal but no internet passes through. This tests basic troubleshooting of hotspot functionality and the dependency on cellular data.

Full explanation →
33
MCQeasy

A user reports that their external monitor connected via HDMI shows a blurry image and the text is hard to read. They have tried a different HDMI cable and the issue persists. What is the most likely cause?

A.The HDMI cable is defective.
B.The monitor's refresh rate is set too low.
C.The display resolution is set below the monitor's native resolution.
D.The graphics driver is corrupted.
AnswerC

A non-native resolution forces the monitor to scale, causing blurriness. Setting it to native resolution fixes this.

Why this answer

When an external monitor displays a blurry image with hard-to-read text, the most likely cause is that the display resolution is set below the monitor's native resolution. Each LCD monitor has a fixed native resolution (e.g., 1920x1080), and running at any other resolution forces the monitor to scale the image, which introduces blurriness and loss of sharpness. Since the user already tried a different HDMI cable, the cable is not the issue, and a low refresh rate typically causes flickering or motion artifacts, not static blur.

Exam trap

The trap here is that candidates often confuse a low refresh rate with resolution-related blur, but refresh rate affects motion smoothness, not static image sharpness, while resolution mismatch directly causes the described symptom.

How to eliminate wrong answers

Option A is wrong because the user already tried a different HDMI cable and the issue persists, ruling out a defective cable. Option B is wrong because a low refresh rate (e.g., 30 Hz) causes flickering, stuttering, or motion blur, not static blurriness or hard-to-read text. Option D is wrong because a corrupted graphics driver typically causes more severe symptoms like screen artifacts, crashes, or no display at all, not a consistent blurry image that persists across cable swaps.

Full explanation →
34
MCQmedium

During a network upgrade, a technician needs to connect two switches that are 120 meters apart using a copper Ethernet cable. The cable run must support 1 Gbps speeds. Which cable type and configuration should be used?

A.Cat 5e crossover cable
B.Cat 6a straight-through cable
C.Cat 6 crossover cable
D.Cat 5e straight-through cable
AnswerB

Cat 6a supports 1 Gbps beyond 100 meters (up to 100 meters at 10 Gbps, but for 1 Gbps it can reach slightly farther with good installation; 120 meters is acceptable with quality cable), and straight-through works with modern switches.

Why this answer

Cat 6a cabling supports 1 Gbps speeds over distances up to 100 meters, but the question specifies a 120-meter run. However, Cat 6a is designed to handle higher frequencies (500 MHz) and can support 10 Gbps up to 100 meters; for 1 Gbps, it can often exceed the 100-meter limit under proper installation conditions, though the standard maximum for 1 Gbps over twisted pair is 100 meters. The straight-through configuration is correct because modern switches use Auto-MDIX, which automatically detects and corrects for cable type, making crossover cables unnecessary.

Given the options, Cat 6a straight-through is the best choice for a 120-meter run at 1 Gbps, as it provides superior signal integrity and noise resistance compared to Cat 5e or Cat 6.

Exam trap

A common pitfall on the CompTIA A+ exam is assuming that crossover cables are required for switch-to-switch connections. However, Auto-MDIX (enabled by default on most modern switches) eliminates this need, making straight-through cables the correct choice regardless of device type.

How to eliminate wrong answers

Option A is wrong because Cat 5e crossover cable is limited to 100 meters for 1 Gbps and is unnecessary with Auto-MDIX; the 120-meter distance exceeds Cat 5e's reliable range. Option C is wrong because Cat 6 crossover cable, while capable of 1 Gbps up to 100 meters, still cannot guarantee performance at 120 meters, and a crossover cable is not required due to Auto-MDIX. Option D is wrong because Cat 5e straight-through cable is limited to 100 meters for 1 Gbps and cannot reliably support a 120-meter run without signal degradation.

Full explanation →
35
MCQhard

A technician is troubleshooting a DSL connection that keeps disconnecting. The modem shows the DSL light blinking. After checking the phone line, they find a filter is missing on a nearby phone handset. How does this cause the issue?

A.The phone handset draws too much power from the line
B.The missing filter allows voice frequencies to interfere with DSL frequencies
C.The filter is needed to amplify the DSL signal
D.The phone handset creates a short circuit without the filter
AnswerB

DSL and voice share the same line; filters separate them to prevent interference.

Why this answer

DSL operates at frequencies above the voice band (typically 25 kHz to 1.1 MHz for ADSL), while analog phone handsets use the 0–4 kHz range. A missing filter (microfilter) allows the phone handset's impedance changes and noise from voice-band signals to reflect onto the DSL line, causing crosstalk and signal-to-noise ratio degradation. This interference triggers frequent retrains and disconnections, visible as a blinking DSL light.

Exam trap

The trap here is that candidates confuse a missing filter with a power or short-circuit issue, overlooking the fundamental principle that DSL and POTS share the same wire pair but require frequency separation to avoid interference.

How to eliminate wrong answers

Option A is wrong because a phone handset does not draw significant power from the DSL line; DSL and POTS share the same pair but the handset's power is negligible and not the cause of disconnections. Option C is wrong because a filter is a passive low-pass device that blocks high-frequency DSL signals from reaching the phone, not an amplifier; DSL signal amplification is done by the modem or line driver, not the filter. Option D is wrong because a missing filter does not create a short circuit; the phone handset remains a high-impedance device on the line, and the issue is frequency-domain interference, not a DC or AC short.

Full explanation →
36
MCQmedium

A technician is troubleshooting a user's computer that can reach internal servers by IP address but not by hostname. Other computers on the same subnet work correctly. Which tool should the technician use to check the computer's DNS resolution?

A.Ping
B.ipconfig /flushdns
C.nslookup
D.Netstat
AnswerC

nslookup queries the configured DNS server to resolve a hostname, allowing the technician to see if DNS is working.

Why this answer

The user's computer can reach internal servers by IP address but not by hostname, and other computers on the same subnet work correctly. This isolates the problem to the local DNS resolution on the affected machine. The `nslookup` tool is specifically designed to query DNS servers and verify whether a hostname resolves to the correct IP address, making it the appropriate tool to diagnose the DNS resolution failure.

Exam trap

The trap here is that candidates often choose `ipconfig /flushdns` (Option B) thinking it will fix the problem, but the question asks for a tool to *check* DNS resolution, not to clear the cache; `nslookup` is the correct diagnostic command.

How to eliminate wrong answers

Option A is wrong because `ping` tests network connectivity by sending ICMP echo requests to an IP address or hostname, but it does not directly query DNS or reveal resolution errors; it would only fail if resolution fails, without providing diagnostic details. Option B is wrong because `ipconfig /flushdns` clears the local DNS cache, which might resolve a stale cache issue, but it does not test or verify DNS resolution; it is a remediation step, not a diagnostic tool. Option D is wrong because `netstat` displays active network connections, routing tables, and interface statistics, but it does not perform or test DNS resolution queries.

Full explanation →
37
MCQeasy

A small office has intermittent connectivity issues. The technician needs to verify that the Ethernet cable from the wall jack to the workstation meets T568A wiring standards. Which tool is most appropriate for this task?

A.Multimeter
B.Cable tester with wire map
C.Toner and probe
D.Crimper
AnswerB

This tool checks each conductor's connection from pin to pin, ensuring the cable is wired correctly per T568A or T568B.

Why this answer

A cable tester with wire map is the correct tool because it verifies that each of the eight wires in the Ethernet cable is terminated to the correct pin on the RJ45 connector according to the T568A standard. This ensures proper continuity and pin-to-pin mapping, which is essential for reliable network connectivity. Intermittent issues often stem from miswired or broken pairs, which a wire map test can detect.

Exam trap

The trap here is that candidates often confuse a toner and probe (used for cable tracing) with a cable tester (used for verifying wiring standards), leading them to choose option C when the question specifically asks for verifying T568A compliance.

How to eliminate wrong answers

Option A is wrong because a multimeter can only test for continuity or resistance on individual wires, but it cannot verify the correct pinout order or detect split pairs required for T568A compliance. Option C is wrong because a toner and probe is used to trace and identify a specific cable within a bundle or at a patch panel, not to verify wiring standards or pin-to-pin mapping. Option D is wrong because a crimper is used to attach an RJ45 connector to a cable, not to test or verify existing wiring standards.

Full explanation →
38
MCQeasy

A user complains that their smartphone frequently disconnects from the office Wi-Fi and then reconnects after a few seconds. The issue occurs only when the user walks to a specific part of the building. What is the most likely cause?

A.The smartphone's battery saver mode is turning off Wi-Fi.
B.The office access point is overloaded with too many connections.
C.The smartphone is encountering a Wi-Fi dead zone due to building materials.
D.The smartphone's Wi-Fi antenna is loose.
AnswerC

Building materials such as concrete or metal can create dead zones where the signal is too weak, causing intermittent disconnections.

Why this answer

The issue occurs only when the user walks to a specific part of the building, which strongly indicates a physical obstruction or signal absorption by building materials (e.g., concrete, metal studs, or rebar). Wi-Fi signals in the 2.4 GHz and 5 GHz bands attenuate significantly when passing through dense materials, creating localized dead zones where the client device loses connectivity and then reconnects upon moving back into range. This matches the symptom of frequent disconnects and reconnects tied to a specific location.

Exam trap

The 220-1201 exam often tests the concept that location-specific Wi-Fi issues are almost always due to physical obstructions or dead zones, not device-specific hardware faults or network-wide overload, which are common distractors.

How to eliminate wrong answers

Option A is wrong because battery saver mode typically disables Wi-Fi when the device is idle or the screen is off, not when the user is actively walking and using the phone; it would not cause location-specific disconnects. Option B is wrong because an overloaded access point would cause slow speeds or connection failures for all users in the area, not just a single user at a specific spot, and the reconnection pattern would not be tied to movement. Option D is wrong because a loose Wi-Fi antenna would cause persistent, random disconnects regardless of location, not a consistent pattern tied to a specific part of the building.

Full explanation →
39
MCQeasy

During a network upgrade, a technician installs a new wireless access point. Users on the new AP can access local resources but cannot browse the internet. The technician verifies that the AP has a valid IP address and can ping an external website by IP address. Which protocol is most likely misconfigured?

A.DNS
B.DHCP
C.ICMP
D.ARP
AnswerA

DNS translates domain names to IP addresses; if the AP or its clients have incorrect DNS server settings, browsing by name fails even though IP connectivity exists.

Why this answer

The technician can ping an external website by IP address, which confirms that IP routing, ICMP, and internet connectivity are working. However, users cannot browse the internet, which typically relies on domain name resolution. Since the AP has a valid IP address and local resources are accessible, the most likely misconfiguration is DNS, as the AP or its clients are not receiving the correct DNS server addresses to resolve domain names to IP addresses.

Exam trap

CompTIA A+ often tests the distinction between IP connectivity (verified by ping to an IP) and name resolution (DNS), leading candidates to incorrectly suspect DHCP or routing issues when the real problem is DNS misconfiguration.

How to eliminate wrong answers

Option B (DHCP) is wrong because the AP has a valid IP address and users can access local resources, indicating DHCP is functioning correctly for IP address assignment. Option C (ICMP) is wrong because the technician successfully pinged an external website by IP address, proving ICMP is working and not blocked. Option D (ARP) is wrong because ARP operates at Layer 2 to resolve MAC addresses for local network communication; since local resources are accessible, ARP is functioning properly.

Full explanation →
40
MCQhard

A technician is troubleshooting a monitor that displays a 'fuzzy' image with ghosting. The monitor is connected via VGA. The technician has already tried a different VGA cable and the issue persists. What should the technician check next?

A.Replace the monitor.
B.Change the resolution to a lower setting.
C.Route the VGA cable away from power cables and other electronics.
D.Update the graphics driver.
AnswerC

VGA cables are susceptible to electromagnetic interference, which causes ghosting. Moving the cable away from power sources can resolve this.

Why this answer

The correct answer is C because the symptoms described (fuzzy image with ghosting) are classic signs of electromagnetic interference (EMI) affecting an analog VGA signal. Since the technician has already ruled out a faulty VGA cable, the next logical step is to ensure the cable is not running parallel to power cables or near other electronics that can induce interference. Re-routing the VGA cable away from such sources can eliminate the ghosting without replacing hardware or changing settings.

Exam trap

CompTIA often tests the candidate's understanding that analog signals (VGA) are susceptible to electromagnetic interference, whereas digital signals (HDMI, DisplayPort) are not, leading candidates to incorrectly focus on driver updates or resolution changes instead of physical cable management.

How to eliminate wrong answers

Option A is wrong because replacing the monitor is a premature and costly step; the issue is likely environmental (EMI) or related to the signal path, not a permanent monitor defect. Option B is wrong because changing the resolution to a lower setting does not address the root cause of ghosting from interference; it may actually worsen the analog signal's susceptibility to noise by altering the pixel clock frequency. Option D is wrong because updating the graphics driver would not resolve analog interference issues; drivers manage digital signal processing and output timings, not physical EMI shielding or cable routing.

Full explanation →
41
MCQmedium

A small office is moving to a new location and needs a dedicated, symmetrical internet connection with a guaranteed service level agreement (SLA). Which type of internet connection should be installed?

A.Cable broadband
B.DSL
C.Fiber optic
D.Satellite
AnswerC

Fiber optic provides symmetrical speeds and can be provisioned with an SLA for business customers.

Why this answer

Fiber optic connections provide dedicated, symmetrical bandwidth with the highest reliability and are the only option among these that typically offers a guaranteed SLA for uptime and performance. Unlike shared media (cable) or distance-limited technologies (DSL), fiber uses light signals over glass strands, ensuring consistent speeds and low latency that meet business-grade requirements.

Exam trap

Cisco often tests the misconception that 'broadband' implies high speed and reliability, but the trap here is that cable broadband is shared and asymmetrical, while fiber is the only option that provides dedicated, symmetrical speeds with a contractual SLA.

How to eliminate wrong answers

Option A is wrong because cable broadband uses a shared coaxial infrastructure (DOCSIS) where bandwidth is contended among neighborhood users, resulting in asymmetrical speeds and no guaranteed SLA. Option B is wrong because DSL operates over twisted-pair copper telephone lines with distance-dependent attenuation, offering asymmetrical speeds and no SLA guarantee due to line quality variability. Option D is wrong because satellite internet suffers from high latency (typically 600+ ms due to geostationary orbit), shared bandwidth, and weather-dependent signal degradation, making it unsuitable for a dedicated, symmetrical, SLA-backed connection.

Full explanation →
42
MCQeasy

A customer reports that their multifunction printer (MFP) is not scanning to email. The MFP is connected to the network via Ethernet, and other network functions like printing work fine. What is the most likely cause of this issue?

A.The MFP is out of toner.
B.The network cable is loose.
C.The SMTP server settings are incorrect.
D.The scanner glass is dirty.
AnswerC

Scan to email relies on SMTP to send the email; incorrect settings would break this feature while leaving other network services unaffected.

Why this answer

Scan to email requires the MFP to communicate with an SMTP server to send the email. Incorrect SMTP server settings are a common misconfiguration that prevents this function while other network services remain operational.

Full explanation →
43
MCQhard

A technician is configuring a workstation for a graphic designer who needs to work with large 4K video files. The motherboard supports SATA III and has one M.2 slot. Which storage configuration will provide the best performance for this workload?

A.One SATA III SSD for the OS and one SATA III HDD for media files.
B.One NVMe M.2 SSD for both the OS and media files.
C.Two SATA III SSDs in RAID 0.
D.One SATA III SSD for the OS and one NVMe M.2 SSD for media files.
AnswerB

An NVMe SSD provides the fastest speeds available, handling both OS and large media files efficiently.

Why this answer

This question tests understanding of storage interface speeds. NVMe M.2 SSDs offer significantly higher sequential read/write speeds (up to 3500 MB/s) compared to SATA III (up to 550 MB/s), making them ideal for large file editing.

Full explanation →
44
MCQhard

You are setting up a new branch office and need to run Ethernet cables through ceiling plenums. You must ensure the cables meet fire safety codes. Which type of cable should you use, and which tool would you use to verify its integrity after installation?

A.Use plenum-rated cable; verify with a cable tester
B.Use PVC cable; verify with a multimeter
C.Use shielded cable; verify with a toner probe
D.Use fiber optic cable; verify with a loopback plug
AnswerA

Plenum-rated cable meets fire codes for ceiling spaces, and a cable tester checks for proper termination and continuity.

Why this answer

Plenum-rated cable is required for installation in ceiling plenums because it is made with low-smoke, fire-retardant materials (e.g., FEP or PVDF) that do not emit toxic fumes or support flame spread, meeting fire safety codes such as NFPA 70 (NEC) Article 800. After installation, a cable tester (e.g., a wiremap tester or certification tool like a Fluke DSX) verifies integrity by checking for continuity, shorts, opens, and proper pin-to-pin wiring per T568A/B standards.

Exam trap

Cisco often tests the distinction between fire safety ratings (plenum vs. riser vs. PVC) and functional cable types (shielded vs. unshielded), so candidates mistakenly choose shielded cable for fire safety or confuse a multimeter with a proper cable tester.

How to eliminate wrong answers

Option B is wrong because PVC (polyvinyl chloride) cable is not plenum-rated; it produces toxic smoke and is only suitable for non-plenum spaces, and a multimeter measures voltage, resistance, or continuity but cannot verify proper Ethernet pinout or signal integrity. Option C is wrong because shielded cable (STP/FTP) is used for electromagnetic interference protection, not fire safety, and a toner probe is used for tracing cables or identifying pairs, not for verifying wiring integrity or performance. Option D is wrong because fiber optic cable is not typically used for standard Ethernet runs in branch offices due to cost and termination complexity, and a loopback plug is used for testing network interface ports, not for verifying the integrity of a cable run.

Full explanation →
45
MCQmedium

A user complains that their laptop cannot connect to the company's wireless network, but other devices work fine. The network uses WPA2-Enterprise with 802.1X authentication. Which service is most likely misconfigured on the laptop?

A.The DHCP server is out of addresses.
B.The DNS server address is incorrect.
C.The RADIUS server is offline.
D.The 802.1X authentication method is set to PEAP instead of EAP-TLS.
AnswerD

A mismatch in the EAP method (e.g., requiring certificates but using passwords) will cause authentication failure for that client.

Why this answer

Option D is correct because WPA2-Enterprise with 802.1X authentication requires the laptop to use a supplicant configured with the correct EAP method that matches the RADIUS server. If the laptop is set to PEAP (which uses a username/password or certificate) but the network requires EAP-TLS (which mandates client certificates), authentication will fail, preventing the laptop from connecting even though other devices with the correct configuration work fine.

Exam trap

CompTIA often tests the distinction between authentication methods (PEAP vs. EAP-TLS) in 802.1X scenarios, and the trap here is that candidates mistakenly blame a server-side issue (like RADIUS being offline) when the problem is actually a client-side supplicant configuration mismatch.

How to eliminate wrong answers

Option A is wrong because a DHCP server running out of addresses would affect all devices, not just one laptop, and would typically result in an IP address conflict or APIPA assignment, not a complete failure to connect to the wireless network. Option B is wrong because an incorrect DNS server address would not prevent the laptop from associating and authenticating to the wireless network; DNS is used for name resolution after connectivity is established, not for the 802.1X authentication process itself. Option C is wrong because if the RADIUS server were offline, no devices would be able to authenticate via 802.1X, but the scenario states other devices work fine, indicating the RADIUS server is operational.

Full explanation →
46
MCQmedium

A user complains that their Android tablet's touchscreen is unresponsive in a vertical strip down the middle of the screen, but the rest of the screen works fine. They have restarted the device and removed the screen protector. What is the most likely cause?

A.A software glitch in the touchscreen driver.
B.The screen protector is causing interference.
C.The LCD panel is failing.
D.The digitizer is damaged.
AnswerD

The digitizer is the touch-sensitive layer. Physical damage (e.g., from a drop or pressure) can create a dead zone in a specific area. This matches the symptom exactly.

Why this answer

A vertical strip of unresponsive touch input is a classic sign of a damaged digitizer. The digitizer is the layer that detects touch, and it can be physically damaged (cracked internally) even if the glass appears intact. Software issues typically cause full unresponsiveness or erratic behavior, not a precise dead zone.

Full explanation →
47
MCQhard

A city government wants to provide free public Wi-Fi in a downtown area spanning 2 square miles. The network must handle hundreds of simultaneous users and be accessible from streets and parks. Which network type is most appropriate for this deployment?

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

A MAN is designed to cover a city or large campus, making it suitable for a downtown public Wi-Fi zone.

Why this answer

A Metropolitan Area Network (MAN) is designed to cover a geographic area larger than a LAN but smaller than a WAN, typically spanning a city or a large campus. For a 2-square-mile downtown area with hundreds of simultaneous users, a MAN provides the necessary range, high capacity, and centralized management to deliver public Wi-Fi access across streets and parks. Technologies such as WiMAX (IEEE 802.16) or carrier-grade Wi-Fi mesh networks are commonly used in MAN deployments to ensure seamless coverage and user density.

Exam trap

CompTIA A+ often tests the distinction between LAN and MAN by presenting a scenario with a large campus or city area, where candidates mistakenly choose LAN because they overlook the geographic scale and outdoor coverage requirements.

How to eliminate wrong answers

Option A is wrong because a Local Area Network (LAN) is confined to a single building or small campus (typically up to a few hundred meters) and cannot cover a 2-square-mile outdoor area. Option B is wrong because a Wide Area Network (WAN) spans large geographical distances (e.g., between cities or countries) and is typically used for connecting remote networks, not for providing localized public Wi-Fi within a single city. Option C is wrong because a Personal Area Network (PAN) covers only a very short range (usually up to 10 meters) around an individual, such as Bluetooth or USB connections, and cannot support hundreds of simultaneous users across a downtown area.

Full explanation →
48
MCQeasy

A customer reports that their external USB 3.0 hard drive is not recognized when plugged into a specific port on their desktop, but works on other ports. The drive is powered by the USB bus. What should be checked first?

A.Replace the external hard drive.
B.Update the USB controller drivers.
C.Inspect the USB port for debris or physical damage.
D.Enable the USB port in the BIOS.
AnswerC

Debris or bent pins can prevent a connection; this is a common, easily fixed issue.

Why this answer

This scenario tests basic USB troubleshooting. Since the drive works on other ports, the issue is likely with the specific port, not the drive or drivers. Checking the USB port for debris or damage is the quickest and simplest first step.

Full explanation →
49
MCQmedium

A user tries to scan a document to a network folder from the multifunction printer, but receives 'Access Denied' error. The printer has been configured with the folder path and credentials. What is the most likely issue?

A.The printer's IP address has changed.
B.The network folder share name has a typo.
C.The user account used for scanning does not have write permissions to the folder.
D.The printer's hard drive is full.
AnswerC

Access Denied indicates the printer can reach the folder but lacks permission to write files.

Why this answer

Scan-to-network-folder requires the printer to have write permissions to the shared folder. Even if the path is correct, the credentials used must have 'Write' or 'Modify' permissions on that folder. This is a common misconfiguration.

Full explanation →
50
MCQmedium

A technician is troubleshooting a laser printer that produces a '50.1 Fuser Error' message on the display. The printer is in a dusty warehouse environment. What should the technician do first?

A.Replace the fuser immediately
B.Clean the fuser with compressed air
C.Power cycle the printer
D.Update the printer firmware
AnswerC

Power cycling resets the printer's internal state and may clear temporary error conditions.

Why this answer

A fuser error code like 50.1 indicates the fuser is not reaching the correct temperature or has a hardware fault. The first step is to power cycle the printer to clear temporary errors. If the error persists, the fuser assembly likely needs replacement.

Dust can cause overheating or sensor issues.

Full explanation →
51
MCQhard

A technician is troubleshooting a high-end workstation that randomly freezes during heavy 3D rendering. The motherboard has an X299 chipset with an LGA 2066 socket. The CPU temperature is normal, and the RAM passes MemTest86. Which motherboard component is most likely causing the instability?

A.The CPU power phase controller
B.The chipset heatsink is clogged with dust
C.The BIOS is outdated
D.The PCIe slot is failing
AnswerB

An overheating chipset can cause random freezes during heavy I/O operations, as the chipset throttles or fails under thermal stress.

Why this answer

Random freezes under heavy load, with normal CPU temps and good RAM, often point to the chipset overheating. The chipset (e.g., X299) manages high-speed data transfer between the CPU, GPU, and storage; if its heatsink is clogged or the fan fails, it can overheat and cause system instability. This is a common issue in workstations with heavy I/O demands.

Full explanation →
52
MCQeasy

A small office uses a cable internet connection with a DOCSIS 3.0 modem. Users complain that speeds drop significantly during peak evening hours. What is the most likely cause?

A.The modem's firmware is out of date.
B.The office's router is overheating.
C.Neighborhood congestion from shared bandwidth.
D.The ISP is performing maintenance every evening.
AnswerC

Cable internet is a shared medium; increased usage by neighbors in the evening causes congestion and slower speeds.

Why this answer

DOCSIS 3.0 cable internet uses a shared coaxial line to the neighborhood node. During peak evening hours, many subscribers contend for the same upstream and downstream channels, causing throughput to drop due to congestion. This is a classic symptom of shared bandwidth in cable broadband, not a device-level issue.

Exam trap

CompTIA A+ often tests the distinction between local device issues (firmware, overheating) and ISP-side shared bandwidth congestion, where the trap is that candidates blame the modem or router because the symptom appears at the user's location.

How to eliminate wrong answers

Option A is wrong because outdated modem firmware can cause stability or compatibility issues, but it would not cause a predictable daily drop only during peak hours. Option B is wrong because an overheating router would cause intermittent disconnects or complete failure, not a consistent speed degradation tied to evening usage patterns. Option D is wrong because ISPs typically schedule maintenance during low-usage hours (e.g., 2-4 AM), not every evening during peak demand, and maintenance would likely cause a total outage rather than a speed drop.

Full explanation →
53
MCQmedium

A user complains that when they scan a document to a network folder from the MFP, the scanned file is saved as a blank image. The MFP is configured to scan to a shared folder on a Windows server. What is the most likely cause?

A.The network folder is full.
B.The scanner needs to be recalibrated.
C.The scan resolution is set too low.
D.The network cable is faulty.
AnswerB

Recalibration resets the scanner's sensors and white balance, which can fix blank scans caused by calibration drift.

Why this answer

A blank scanned image typically indicates the scanner is not capturing data, often due to a calibration or sensor issue. The MFP's scanner calibration can drift over time, leading to all-white scans even though the scanning process appears to run.

Full explanation →
54
MCQhard

A company deploys a network where each department has its own switch, and all switches connect to a central core switch. The network uses VLANs to separate traffic for finance, HR, and engineering. Which network type best describes the overall architecture, and what is a key characteristic?

A.Peer-to-peer network; each department shares resources directly.
B.Client-server LAN with VLAN segmentation; the core switch routes between VLANs.
C.Wide area network (WAN); the departments are in different locations.
D.Metropolitan area network (MAN); the switches are spread across a city.
AnswerB

A client-server LAN uses central devices like switches and routers; VLANs logically separate traffic, and the core switch handles inter-VLAN routing.

Why this answer

The architecture is a client-server LAN because all department switches connect to a central core switch, which provides centralized routing and management. VLAN segmentation isolates traffic for finance, HR, and engineering, and the core switch performs inter-VLAN routing (typically using a router-on-a-stick or Layer 3 switch with SVIs) to allow controlled communication between VLANs. This design is a classic hierarchical LAN topology, not a peer-to-peer, WAN, or MAN.

Exam trap

Cisco often tests the distinction between LAN and WAN by embedding VLANs in a single-site scenario; the trap here is assuming that VLANs imply multiple locations (WAN/MAN) rather than recognizing that VLANs are a LAN segmentation technique that can exist within a single building.

How to eliminate wrong answers

Option A is wrong because a peer-to-peer network has no central device; each node shares resources directly with others, whereas this scenario has a central core switch and VLANs that require routing. Option C is wrong because a WAN connects geographically separate locations (e.g., via leased lines or VPNs), but the description states all switches connect to a central core switch, implying a single-site LAN. Option D is wrong because a MAN spans a city (e.g., using fiber rings), but the scenario describes a single building or campus with a central core switch, not a metro-scale deployment.

Full explanation →
55
MCQmedium

A technician is building a new gaming PC and installs two 16 GB DDR5-5600 modules in the correct slots. The system boots and shows 32 GB in the BIOS, but the memory speed is reported as 4800 MHz instead of 5600 MHz. What is the most likely reason for this?

A.The RAM modules are defective and cannot run at their rated speed.
B.The motherboard does not support DDR5-5600.
C.XMP or EXPO has not been enabled in the BIOS.
D.The RAM is installed in the wrong slots.
AnswerC

Enabling XMP/EXPO is required to run RAM at its rated speed; otherwise, it runs at a conservative default.

Why this answer

DDR5 modules default to a standard JEDEC speed (often 4800 MHz) for stability. To achieve the rated 5600 MHz, the user must enable XMP (Intel) or EXPO (AMD) in the BIOS, which applies the manufacturer's overclocking profile. This tests knowledge of memory speed configuration beyond plug-and-play.

Full explanation →
56
MCQhard

A user reports that their inkjet printer prints blank pages even though the ink cartridges are full and the printer shows no error messages. The technician has already checked the ink levels and performed a nozzle check, which showed no ink on the test pattern. What is the most likely cause?

A.The printer driver is corrupted and needs reinstallation.
B.The printhead has failed and needs to be replaced.
C.The paper type setting is set to 'transparency'.
D.The ink cartridges are not properly seated.
AnswerB

A failed printhead cannot move or eject ink, resulting in blank pages even with full cartridges.

Why this answer

Blank pages despite full cartridges and no errors often indicate a failed printhead that cannot deliver ink to the nozzles. The nozzle check pattern being blank confirms no ink is being ejected. A clogged printhead might show partial patterns, but a completely blank test suggests electrical or mechanical failure of the printhead.

Full explanation →
57
MCQhard

A technician is troubleshooting a network where users can access the internet but cannot reach a specific internal web server by its hostname. The server's IP is 10.0.0.5, and pinging 10.0.0.5 works. The technician checks the DNS server and finds an A record for the server's name pointing to 10.0.0.10. What is the most likely issue?

A.The DHCP server assigned the wrong IP to the server
B.The DNS A record is incorrect
C.The router's port forwarding is misconfigured
D.The server's firewall is blocking DNS queries
AnswerB

The A record points to 10.0.0.10 instead of 10.0.0.5, so DNS resolves to the wrong IP, preventing access by hostname.

Why this answer

The correct answer is B because the DNS A record maps the server's hostname to 10.0.0.10, but the server's actual IP is 10.0.0.5. Since pinging the IP works, the network path to the server is functional; the failure to reach it by hostname is due to DNS resolving to the wrong address. This is a classic DNS misconfiguration where the A record does not match the server's assigned IP.

Exam trap

CompTIA A+ often tests the distinction between connectivity issues (where pinging the IP fails) and name resolution issues (where pinging the IP works but hostname fails), and the trap here is that candidates may incorrectly suspect a firewall or DHCP problem instead of recognizing the DNS record mismatch.

How to eliminate wrong answers

Option A is wrong because the DHCP server assigning the wrong IP would cause the server to have a different IP than 10.0.0.5, but the technician confirmed pinging 10.0.0.5 works, so the server is correctly at that IP. Option C is wrong because port forwarding is a router function for external access to internal resources, but the issue is internal users unable to reach an internal server by hostname, which does not involve port forwarding. Option D is wrong because the server's firewall blocking DNS queries would prevent the server from resolving names, but the problem is clients failing to resolve the server's hostname, not the server performing DNS lookups.

Full explanation →
58
MCQmedium

A technician is setting up a new VoIP phone system. To ensure voice quality, they need to prioritize voice traffic over data traffic on the network. Which QoS configuration method should be implemented?

A.Set the VoIP phones to use a static IP address
B.Configure DSCP markings on the VoIP traffic
C.Enable VLAN tagging on the switch ports
D.Use a crossover cable between the phone and switch
AnswerB

DSCP marks packets with a priority level (e.g., EF for voice), enabling network devices to treat them with higher priority than data traffic.

Why this answer

DSCP (Differentiated Services Code Point) markings allow VoIP traffic to be classified and prioritized at Layer 3, ensuring low latency and jitter for voice packets. By marking VoIP packets with a specific DSCP value (e.g., EF for expedited forwarding), routers and switches can apply QoS policies to give voice traffic priority over data traffic. This is the standard method for QoS in VoIP deployments.

Exam trap

A common misconception is that VLAN tagging alone provides QoS, but VLANs only segregate traffic; prioritization requires Layer 3 markings like DSCP or Layer 2 CoS values.

How to eliminate wrong answers

Option A is wrong because setting a static IP address does not prioritize traffic; it only ensures a fixed address for the phone, which has no effect on QoS. Option C is wrong because VLAN tagging separates voice and data traffic into different broadcast domains but does not itself provide prioritization; QoS markings are still required within the VLAN. Option D is wrong because a crossover cable is used for direct device-to-device connections without a switch, but it does not influence traffic prioritization or QoS.

Full explanation →
59
MCQmedium

A user reports that their smartphone's charging port is loose and the cable falls out easily, making it difficult to charge. The technician inspects the port and sees no visible debris. What is the most likely cause and the appropriate repair?

A.The charging cable is defective; replace the cable.
B.The charging port has worn-out pins; replace the charging port assembly.
C.Use compressed air to blow out the port.
D.Apply a small amount of super glue to the port to tighten it.
AnswerB

Worn pins cause a loose connection. Replacing the entire port assembly restores a snug fit and reliable charging.

Why this answer

The user reports a loose physical connection with no visible debris, which points to mechanical wear of the port's internal retention mechanism (e.g., the spring-loaded pins or the port's latch). Since the cable falls out easily, the most likely cause is worn-out pins inside the charging port assembly, and the appropriate repair is to replace the entire charging port assembly, as individual pins cannot be serviced separately.

Exam trap

The 220-1201 exam often tests the distinction between a cable defect and a port defect by describing a physical symptom (loose fit) that cannot be caused by a cable issue, leading candidates to incorrectly choose 'replace the cable' when the port is the actual failure point.

How to eliminate wrong answers

Option A is wrong because a defective cable would typically cause intermittent charging or no charging, but it would not cause the cable to fall out of the port easily; the physical looseness is a port-side issue. Option C is wrong because compressed air is used to remove debris, but the technician already inspected and saw no visible debris, so this would not address worn-out pins. Option D is wrong because applying super glue to the port would permanently damage the port and cable, create a safety hazard, and is not a standard repair procedure; it violates basic hardware servicing best practices.

Full explanation →
60
MCQeasy

A technician is setting up a conference room and needs to connect a laptop to a projector that only has a VGA input. The laptop has an HDMI output. Which adapter should the technician use?

A.HDMI to DVI adapter
B.USB-C to VGA adapter
C.HDMI to VGA adapter
D.DisplayPort to VGA adapter
AnswerC

This adapter converts the digital HDMI signal to analog VGA, allowing connection to the projector.

Why this answer

HDMI to VGA adapters are common for connecting modern laptops to older projectors. VGA is an analog signal, so the adapter must be active to convert digital HDMI to analog VGA. This question tests knowledge of legacy connector compatibility.

Full explanation →
61
MCQmedium

A user reports that when they scan a document using the flatbed scanner on their multifunction printer, the resulting image has a blue tint. The same user says printing works fine. What is the most likely cause?

A.The toner cartridge is low on cyan
B.The scanner lamp is failing
C.The document is placed upside down
D.The printer driver is corrupted
AnswerB

A failing or aging scanner lamp can cause color casts, such as a blue tint, in scanned images.

Why this answer

This question tests troubleshooting of scanner-specific issues. A blue tint indicates a problem with the scanner's color calibration or sensor, not the printer's output. The print quality is fine, so the issue is isolated to the scanning subsystem.

Full explanation →
62
MCQmedium

A user's laptop intermittently loses connection to the wireless network. The technician suspects channel congestion from nearby access points. Which tool should be used to identify the least congested Wi-Fi channel?

A.Ping
B.Tracert
C.Wi-Fi analyzer
D.Cable tester
AnswerC

A Wi-Fi analyzer displays channel utilization and nearby networks, allowing the technician to select an optimal channel.

Why this answer

A Wi-Fi analyzer (option C) is the correct tool because it scans the 2.4 GHz and 5 GHz bands, displaying channel utilization, signal strength, and overlapping access points. This allows the technician to identify the least congested channel by visualizing real-time interference and channel overlap, which is essential for resolving intermittent wireless disconnections caused by channel congestion.

Exam trap

The trap here is that candidates confuse connectivity troubleshooting tools (Ping, Tracert) with spectrum analysis tools, assuming any network diagnostic tool can identify wireless channel congestion, when in fact only a Wi-Fi analyzer (or spectrum analyzer) can measure RF channel utilization.

How to eliminate wrong answers

Option A is wrong because Ping tests basic network connectivity and latency to a host using ICMP echo requests, but it does not provide any information about Wi-Fi channel usage or congestion. Option B is wrong because Tracert (traceroute) maps the Layer 3 path packets take to a destination using ICMP time-exceeded messages, but it cannot analyze wireless channel conditions or interference. Option D is wrong because a cable tester verifies physical copper or fiber cabling integrity (e.g., continuity, shorts, opens) and is irrelevant to wireless spectrum analysis.

Full explanation →
63
MCQeasy

A technician is configuring a smartphone for a user who frequently travels internationally. The user wants to avoid high roaming charges but still use data when connected to local Wi-Fi. What should the technician do?

A.Enable airplane mode and then turn on Wi-Fi.
B.Disable cellular data in the mobile network settings.
C.Enable data roaming.
D.Set the device to 2G only.
AnswerB

This stops all cellular data usage while allowing Wi-Fi to remain active, preventing roaming charges when connected to Wi-Fi.

Why this answer

Option B is correct because disabling cellular data in the mobile network settings prevents the device from using the carrier's mobile data network, thereby avoiding roaming charges. The user can still connect to local Wi-Fi networks for data access, as Wi-Fi operates independently of the cellular data radio. This approach ensures that no data is transmitted over the cellular network while traveling internationally.

Exam trap

The trap here is that candidates often confuse disabling cellular data with enabling airplane mode, not realizing that airplane mode also disables Wi-Fi and voice services, whereas disabling cellular data specifically targets data connectivity while preserving other functions.

How to eliminate wrong answers

Option A is wrong because enabling airplane mode turns off all radios, including Wi-Fi; turning Wi-Fi back on while in airplane mode is possible, but this does not prevent the device from re-enabling cellular data if the user manually disables airplane mode, and it does not specifically address roaming charges. Option C is wrong because enabling data roaming explicitly allows the device to use cellular data on foreign networks, which would incur high roaming charges. Option D is wrong because setting the device to 2G only does not disable data connectivity; it merely restricts the network type to 2G, which may still incur roaming charges if the device connects to a foreign 2G network and uses data.

Full explanation →
64
MCQhard

A technician is troubleshooting a network where two computers cannot communicate. Computer A has an IP of 192.168.1.10 with subnet mask 255.255.255.0. Computer B has an IP of 192.168.2.20 with subnet mask 255.255.255.0. Both are connected to the same switch. The switch is not configured with VLANs. Why can't the computers communicate?

A.The switch is blocking the traffic due to MAC address filtering.
B.The computers are on different subnets and need a router to communicate.
C.The subnet mask on Computer B is incorrect.
D.The default gateway on both computers is not set.
AnswerB

Computers on different subnets cannot communicate directly; they require a router to forward packets between the subnets.

Why this answer

Computer A (192.168.1.10/24) and Computer B (192.168.2.20/24) are on different subnets because their subnet masks (255.255.255.0) define network IDs of 192.168.1.0 and 192.168.2.0 respectively. A switch operates at Layer 2 and forwards frames based on MAC addresses within the same broadcast domain, but it cannot route traffic between different subnets. For inter-subnet communication, a Layer 3 device such as a router (or a Layer 3 switch) is required to perform routing.

Exam trap

A common misconception is that two devices connected to the same switch can always communicate regardless of IP addressing. However, the switch operates only at Layer 2, so hosts on different subnets cannot communicate without a router, even if they share the same physical switch.

How to eliminate wrong answers

Option A is wrong because the switch is not configured with VLANs and MAC address filtering is not mentioned; a standard unmanaged switch forwards all frames based on MAC addresses and does not block traffic between two hosts on the same VLAN unless a specific security feature like port security is enabled, which is not indicated. Option C is wrong because the subnet mask 255.255.255.0 on Computer B is correct for a /24 network; the issue is not the mask itself but that the two IP addresses belong to different network IDs. Option D is wrong because the default gateway is only needed when a host wants to communicate with a device on a different subnet; even if both default gateways were set, the computers still cannot directly communicate without a router to forward packets between the subnets.

Full explanation →
65
MCQeasy

A small office uses a single router with four LAN ports. The manager wants to connect 12 wired devices and ensure they can all communicate with each other without purchasing a new router. Which network device should be added to the existing setup?

A.Hub
B.Router
C.Switch
D.Repeater
AnswerC

A switch provides additional Ethernet ports and intelligently forwards frames only to the intended device, making it ideal for expanding a LAN.

Why this answer

A switch is the correct device because it operates at Layer 2 (Data Link layer) of the OSI model, using MAC addresses to forward frames only to the specific port where the destination device is connected. This allows the existing router to remain the gateway for internet access while the switch expands the number of available Ethernet ports, enabling all 12 wired devices to communicate within the same local network without purchasing a new router.

Exam trap

The A+ exam often tests the distinction between hubs and switches by presenting a scenario where a device is needed to increase the number of ports, and candidates mistakenly choose a hub because they think it is cheaper or simpler, ignoring the collision and performance issues that make a switch the only viable solution for more than a few devices.

How to eliminate wrong answers

Option A is wrong because a hub operates at Layer 1 (Physical layer) and simply repeats electrical signals out all ports, causing collisions and inefficient bandwidth usage; it would not provide the necessary port density or intelligent forwarding for 12 devices. Option B is wrong because adding another router would create a separate subnet, requiring additional configuration (like disabling DHCP or setting up routing protocols) to allow communication between devices on different subnets, and it is unnecessary since the existing router already handles routing. Option D is wrong because a repeater only regenerates signals to extend cable distance, it does not add additional ports or allow more devices to connect to the network.

Full explanation →
66
MCQmedium

You are troubleshooting a network issue where a user cannot access a specific server. You need to verify the path that packets take from the user's computer to the server and identify where delays occur. Which command-line tool should you use?

A.ping
B.ipconfig
C.tracert
D.nslookup
AnswerC

Tracert sends packets with increasing TTL values to map the route and measure latency at each hop.

Why this answer

The tracert (traceroute) command is specifically designed to map the path packets take from a source to a destination by sending ICMP Echo Requests with incrementing Time-To-Live (TTL) values. Each router along the path decrements the TTL and, when it reaches zero, sends back an ICMP Time Exceeded message, allowing tracert to display each hop and the round-trip time (RTT) for that hop. This makes it the correct tool for verifying the packet path and identifying where delays occur.

Exam trap

The trap here is that candidates often confuse ping's ability to test reachability and measure latency with the need to see the actual path and per-hop delays, leading them to choose ping instead of tracert.

How to eliminate wrong answers

Option A is wrong because ping only tests basic reachability and measures round-trip time to the destination, but it does not show the intermediate hops or pinpoint where delays occur along the path. Option B is wrong because ipconfig displays local network configuration details (IP address, subnet mask, default gateway) and does not perform any path tracing or latency analysis. Option D is wrong because nslookup is used to query DNS servers to resolve domain names to IP addresses, and it provides no information about the network path or hop-by-hop delays.

Full explanation →
67
MCQmedium

A technician is troubleshooting why a new employee cannot log into the company's VPN. The VPN uses RADIUS for authentication. Other employees can connect successfully. Which is the most likely cause?

A.The VPN server's IP address has changed.
B.The RADIUS server is not reachable from the VPN server.
C.The new employee's account is not configured in the RADIUS database.
D.The DNS server is not resolving the VPN server's hostname.
AnswerC

RADIUS authenticates against its user database; a missing account prevents that user's login.

Why this answer

Since other employees can connect successfully, the VPN server, RADIUS server, and network connectivity between them are functional. The issue is isolated to the new employee, making it most likely that their account has not been added to the RADIUS database. RADIUS authenticates users against a local or directory-based user store; if the account is missing, authentication will fail for that user alone.

Exam trap

The key point is that a centralized authentication failure affecting only one user points to a missing or misconfigured user account in the authentication database, not a network or server-wide issue.

How to eliminate wrong answers

Option A is wrong because if the VPN server's IP address had changed, no employees—including existing ones—would be able to connect. Option B is wrong because if the RADIUS server were unreachable from the VPN server, all authentication attempts would fail, not just the new employee's. Option D is wrong because DNS resolution of the VPN server's hostname is irrelevant to RADIUS authentication; the VPN client typically connects via IP or a hostname that is already resolved, and other users connecting successfully proves DNS is working.

Full explanation →
68
MCQmedium

A user wants to connect their laptop to a 4K TV for a movie marathon. They have a USB-C port on the laptop but the TV only has HDMI. Which accessory is required?

A.A USB-C to DisplayPort adapter.
B.A USB-C to HDMI adapter.
C.A USB-C to VGA adapter.
D.A USB-C to Ethernet adapter.
AnswerB

This is correct; it converts the USB-C video signal to HDMI for the TV.

Why this answer

The correct answer is B because USB-C supports DisplayPort Alternate Mode, which allows video signals to be transmitted over the USB-C connector. A USB-C to HDMI adapter converts the DisplayPort signal from the laptop into an HDMI signal compatible with the TV, enabling 4K video output. This is the standard solution for connecting a USB-C laptop to an HDMI-only display.

Exam trap

The 220-1201 exam often tests the misconception that any USB-C adapter can carry video, but the trap here is that only USB-C ports supporting DisplayPort Alternate Mode (or Thunderbolt 3/4) can output video, and candidates may incorrectly choose a DisplayPort adapter thinking it will work with an HDMI TV via a separate cable.

How to eliminate wrong answers

Option A is wrong because a USB-C to DisplayPort adapter would output a DisplayPort signal, which is not directly compatible with the TV's HDMI input without additional conversion. Option C is wrong because VGA is an analog video standard that cannot support 4K resolution and is obsolete for modern high-definition displays. Option D is wrong because a USB-C to Ethernet adapter provides network connectivity only and does not carry any video signal, making it useless for connecting to a TV.

Full explanation →
69
MCQhard

A user has a laptop that supports Thunderbolt 3 and wants to connect two external 4K monitors at full resolution. They currently have a single USB-C hub that only supports DisplayPort over USB-C. What is the most likely limitation?

A.The laptop's graphics card cannot drive two 4K monitors.
B.The hub does not support Thunderbolt 3 bandwidth.
C.The monitors are not compatible with USB-C.
D.The user needs a USB-C to HDMI adapter for each monitor.
AnswerB

Thunderbolt 3 requires a compatible dock to deliver the necessary bandwidth (40 Gbps) for dual 4K displays; a standard USB-C hub may only support single display or lower resolutions.

Why this answer

Thunderbolt 3 supports up to 40 Gbps bandwidth, which is required to drive two 4K monitors at full resolution (60 Hz) over a single connection. A standard USB-C hub that only supports DisplayPort over USB-C is limited to USB 3.1 Gen 2 (10 Gbps) or USB 3.2 (20 Gbps) bandwidth, which is insufficient to carry two uncompressed 4K video streams simultaneously. Therefore, the hub itself is the bottleneck because it lacks Thunderbolt 3 controller and bandwidth capabilities.

Exam trap

The 220-1201 exam often tests the misconception that any USB-C port or hub can deliver full video bandwidth, when in fact only Thunderbolt 3/4 or USB4 hubs with sufficient DisplayPort tunneling can support dual 4K displays at full resolution.

How to eliminate wrong answers

Option A is wrong because the laptop supports Thunderbolt 3, which inherently includes a capable integrated or discrete GPU that can drive two 4K displays; the limitation is not the graphics card but the hub's bandwidth. Option C is wrong because 4K monitors with DisplayPort or HDMI inputs are fully compatible with USB-C via adapters or direct connection, and the issue is not monitor compatibility but the hub's inability to deliver enough data throughput. Option D is wrong because using USB-C to HDMI adapters would not solve the bandwidth limitation; the hub still cannot provide the necessary video bandwidth for two 4K streams, regardless of the adapter type.

Full explanation →
70
MCQeasy

A user reports that their laser printer is producing pages with vertical black streaks. The streaks appear in the same location on every page, even after cleaning the glass and performing a calibration. Which component is most likely causing this issue?

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

A scratched or damaged drum will transfer a vertical line of toner to every page, producing the reported streaks.

Why this answer

Vertical black streaks on laser printer output that repeat in the same location typically indicate a damaged drum or a scratched organic photoconductor (OPC) drum. The drum is responsible for transferring toner to the paper, and any defect on its surface will reproduce the streak on every page.

Full explanation →
71
MCQeasy

During a network cable installation, a technician needs to verify that a newly run Cat6 cable is properly terminated and free of shorts or opens. The cable is not yet connected to any switch or device. Which tool should the technician use?

A.Tone generator and probe
B.Multimeter
C.Cable tester
D.Loopback plug
AnswerC

A cable tester is designed specifically to verify wiring continuity, correct pinout, and absence of shorts or opens in network cables.

Why this answer

A cable tester is specifically designed to verify proper termination and detect faults like shorts, opens, or miswires in copper Ethernet cables. Since the cable is not connected to any network device, a cable tester can independently validate the integrity of each wire pair by sending signals and checking continuity, which is exactly what this scenario requires.

Exam trap

The trap here is that candidates often confuse a multimeter's ability to check continuity with the comprehensive wiremap and fault detection that only a cable tester provides, especially when the cable is not yet connected to live equipment.

How to eliminate wrong answers

Option A is wrong because a tone generator and probe is used for tracing and identifying cables within a bundle or patch panel, not for testing termination quality or detecting shorts/opens. Option B is wrong because a multimeter can check basic continuity and resistance but cannot verify proper pin-to-pin wiring, pair twists, or cable mapping required for Cat6 certification. Option D is wrong because a loopback plug is used to test network interface ports by sending transmitted signals back to the receiver, not for testing a standalone cable that is not connected to any device.

Full explanation →
72
MCQeasy

A customer reports that their new Gigabit Ethernet connection is only achieving 100 Mbps speeds. The cable run is about 75 meters through a drop ceiling. You verify the switch and NIC are both Gigabit-capable. Which cable issue is most likely causing the speed limitation?

A.The cable is a Cat5e patch cable.
B.The cable is a Cat6a cable.
C.The cable is a Cat5 cable.
D.The cable is a Cat6 cable.
AnswerC

Cat5 cable is only rated for 100 Mbps, so using it for a Gigabit connection would limit speed to 100 Mbps.

Why this answer

Cat5 cable is only rated for 100 Mbps over distances up to 100 meters. Since the run is 75 meters, the cable itself cannot support Gigabit Ethernet (1000BASE-T), which requires at least Cat5e cabling. The switch and NIC being Gigabit-capable confirms the bottleneck is the cable category.

Exam trap

The trap here is that candidates assume any Cat5-style cable (Cat5, Cat5e, Cat6) is sufficient for Gigabit, but only Cat5e and above are certified for 1000BASE-T, and Cat5 is limited to 100 Mbps.

How to eliminate wrong answers

Option A is wrong because Cat5e is fully rated for 1000BASE-T up to 100 meters, so it would not cause a 100 Mbps limitation. Option B is wrong because Cat6a supports 10GBASE-T up to 100 meters, far exceeding Gigabit requirements, so it would not limit speed to 100 Mbps. Option D is wrong because Cat6 supports 1000BASE-T up to 100 meters (and even 10GBASE-T up to 55 meters), so it would not cause a 100 Mbps bottleneck.

Full explanation →
73
MCQmedium

A user complains that their laptop, which has 8 GB of RAM soldered on the motherboard, is running slowly when multitasking. They ask if they can add more RAM. The laptop has one empty SO-DIMM slot. What is the best recommendation?

A.Advise the user to replace the laptop because soldered RAM cannot be upgraded.
B.Recommend adding a SO-DIMM module of the same type and speed as the soldered RAM.
C.Suggest removing the soldered RAM and replacing it with a larger module.
D.Tell the user to install two SO-DIMM modules for dual-channel.
AnswerB

Adding a matching SO-DIMM will increase total RAM and likely improve multitasking performance.

Why this answer

The laptop has a single empty slot, so adding a SO-DIMM module will increase total RAM. However, mixing a soldered module with a SO-DIMM may force single-channel operation, but the capacity gain outweighs this. The technician should recommend adding a compatible DDR4 or DDR5 SO-DIMM (depending on laptop) to improve performance.

Full explanation →
74
MCQhard

A technician is setting up a temporary network for a conference where attendees' laptops need to share files directly without any central access point or router. The conference room has no existing network infrastructure. Which network type should be configured, and what is a potential security risk?

A.Infrastructure mode WLAN; configure a laptop as a software access point.
B.Ad hoc network; each laptop connects directly to others, but encryption may not be enforced.
C.PAN network using Bluetooth; all laptops pair via Bluetooth.
D.Mesh network; each laptop acts as a node forwarding traffic.
AnswerB

Ad hoc networks allow direct device-to-device connections without an AP, but security settings like WPA2 are often not enforced, leaving data vulnerable.

Why this answer

An ad hoc network (IBSS) allows laptops to communicate directly without a central access point, which matches the requirement for direct file sharing with no existing infrastructure. The security risk is that encryption (like WEP or WPA2-Personal) may not be enforced by default in ad hoc mode, leaving data transmissions vulnerable to eavesdropping.

Exam trap

CompTIA often tests the misconception that a software access point (Option A) is the same as ad hoc mode, but a software AP still creates a centralized infrastructure network, not a true peer-to-peer connection.

How to eliminate wrong answers

Option A is wrong because infrastructure mode requires a central access point (hardware or software), which contradicts the 'no central access point or router' requirement; a software AP still acts as a central hub. Option C is wrong because Bluetooth PAN has limited range (typically ~10 meters) and lower throughput, making it impractical for a conference with multiple laptops sharing files directly; it also requires pairing and is not designed for multi-peer file sharing. Option D is wrong because a mesh network typically requires routing protocols and each node forwarding traffic, which adds complexity and is not a standard configuration for direct laptop-to-laptop file sharing without infrastructure; ad hoc mode is the simpler, correct choice.

Full explanation →
75
MCQhard

A technician is troubleshooting a smartphone that cannot establish an NFC connection with a payment terminal. The phone's NFC is enabled, and the screen is unlocked. The payment terminal shows 'No card detected'. Which of the following should the technician check first?

A.The phone's battery level
B.The phone's NFC antenna location and alignment with the terminal
C.The payment terminal's internet connection
D.The phone's default payment app settings
AnswerB

NFC has a very short range (about 4 cm) and requires the phone's NFC antenna to be near the terminal's reader; misalignment is a common issue.

Why this answer

NFC requires close proximity and correct orientation; many phones have the NFC antenna located near the top or back. This tests practical knowledge of NFC hardware placement and the need for precise alignment.

Full explanation →

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