CompTIA A+ Core 1 220-1201 220-1201 Questions 826–871 | Page 12/12

826

MCQeasy

A user reports that their laser printer is producing pages with vertical black streaks. The streaks appear in the same position on every page. What is the most likely cause?

A.Low toner cartridge

B.A dirty corona wire

C.A scratched drum

D.A faulty fuser

AnswerC

A scratch on the photosensitive drum permanently damages its light-sensitive coating. This damaged area will consistently attract toner, even in regions where it should be repelled, and then transfer that excess toner to the paper during each rotation. This repeated transfer of toner from the fixed scratch location results in distinct, consistent vertical black streaks appearing at regular intervals down the printed page.

Why this answer

Vertical black streaks that appear in the same position on every page are typically caused by a scratched or damaged drum (C). The drum is a cylindrical component that transfers toner to the paper; scratches or debris on the drum cause repetitive marks at the same location on each page. Replacing the drum unit resolves the issue.

Exam trap

220-1201 often tests the difference between drum, corona wire, and fuser issues; candidates may confuse vertical streaks with corona wire problems, but corona wire issues typically cause horizontal streaks or smudges.

How to eliminate wrong answers

Option A is wrong because low toner typically causes faded or light print, not sharp vertical streaks. Option B is wrong because a dirty corona wire usually causes horizontal streaks or smudges, not vertical streaks; the corona wire runs horizontally across the drum. Option D is wrong because a faulty fuser causes smudged or smeared toner that can be wiped off, or repeated marks if the fuser roller is damaged, but those marks are usually horizontal or appear as ghosting, not consistent vertical streaks.

Full explanation →

827

MCQmedium

A company is setting up a guest wireless network in a conference room. They want to ensure that guests can access the internet but cannot communicate with internal corporate devices. The network uses a single router and a switch. Which configuration on the router will best achieve this?

A.Configure the router to use DHCP for the guest network.

B.Create a separate VLAN for the guest network and apply an ACL to block traffic to the internal network.

C.Disable the SSID broadcast for the guest network.

D.Use a wireless access point with a built-in firewall.

AnswerB

Creating a separate Virtual Local Area Network (VLAN) for the guest network logically isolates its traffic from the internal network at Layer 2. This segmentation prevents direct communication between guests and internal devices by default. Applying an Access Control List (ACL) on the router then explicitly defines traffic rules, allowing guests internet access while specifically blocking any attempts to reach internal network subnets, thereby enforcing robust security and isolation.

Why this answer

Creating a separate VLAN for the guest network isolates guest traffic at Layer 2, and applying an ACL on the router's VLAN interface blocks traffic destined for the internal network while permitting internet-bound traffic. This ensures guests cannot reach internal corporate devices, meeting the security requirement without additional hardware.

Exam trap

The 220-1201 exam often tests the misconception that disabling SSID broadcast or using DHCP alone provides security, when in fact VLANs with ACLs are required for true network segmentation and access control.

How to eliminate wrong answers

Option A is wrong because DHCP only assigns IP addresses and does not provide any traffic isolation or access control; guests could still communicate with internal devices if they are on the same subnet. Option C is wrong because disabling SSID broadcast merely hides the network name and does not prevent guests from accessing internal devices once connected; it is a privacy measure, not a security control. Option D is wrong because using a wireless access point with a built-in firewall is a hardware solution that may not be available or necessary; the question specifies a single router and switch, and the best approach is to configure the existing router with VLANs and ACLs.

Full explanation →

828

MCQmedium

A user's projector displays a very dim image, even with the brightness setting at maximum. The lamp hour counter shows 1500 hours, and the projector is three years old. What is the most likely cause?

A.The projector's air filter is clogged

B.The video cable is damaged

C.The projector lamp is reaching end of life

D.The input source is set to low brightness

AnswerC

Projector lamps, particularly UHP (Ultra High Performance) mercury vapor lamps, have a finite operational lifespan during which their light-emitting capabilities gradually diminish. As the lamp accumulates operating hours and approaches its end of life, the internal components degrade, leading to a significant reduction in its lumen output. This natural and progressive decrease in brightness is the most common cause of a uniformly dim projected image, signaling that the lamp requires replacement, often after several thousand hours of use.

Why this answer

A projector lamp rated for roughly 1,500–2,000 hours that has reached 1,500 hours of use and is three years old is almost certainly at end of life, which manifests as a dim image even at maximum brightness. Lamp output degrades gradually as the bulb ages, so the symptom matches the lamp hour counter exactly. Replacing the lamp is the standard fix.

Exam trap

220-1201 often tests the distinction between symptoms of a failing lamp (dim image, color shift, flicker) and symptoms of overheating (filter clog, thermal shutdown), so candidates who pick the filter answer confuse a thermal fault with an optical one.

How to eliminate wrong answers

Option A is wrong because a clogged air filter causes overheating and thermal shutdowns, not a uniformly dim image — the projector would typically warn about temperature or shut off. Option B is wrong because a damaged video cable produces artifacts, color shifts, flicker, or no signal, not a dim image across all content. Option D is wrong because input source brightness settings affect only that source's signal level and would not dim the projector's own lamp output; the brightness setting is already at maximum per the scenario.

Full explanation →

829

MCQhard

A laptop's built-in webcam is not recognized by any application. You have checked Device Manager and the camera is not listed. The webcam ribbon cable appears intact. Which component should you suspect next?

A.The webcam driver is outdated.

B.The laptop's BIOS has the webcam disabled.

C.The webcam module or motherboard USB controller has failed.

D.The operating system needs to be reinstalled.

AnswerC

When a built-in webcam is not recognized by the operating system or any application, and is completely absent from Device Manager, it strongly indicates a fundamental hardware failure. This could be due to the webcam module itself failing internally, or more broadly, a failure of the motherboard's internal USB controller or associated circuitry that the webcam relies upon for communication. Without proper electrical connection or a functional controller, the hardware cannot be enumerated by the system.

Why this answer

Since the webcam is not listed in Device Manager at all, the issue is at the hardware detection level, not the driver or software level. An intact ribbon cable suggests the webcam module itself or the motherboard's USB controller (which typically handles the internal webcam as a USB device) has failed, preventing enumeration. Option C correctly identifies this hardware failure as the next logical suspect.

Exam trap

The 220-1201 exam often tests the misconception that a missing device in Device Manager is always a driver issue, when in fact it is a hardware detection failure that must be resolved before drivers can be considered.

How to eliminate wrong answers

Option A is wrong because a missing device in Device Manager indicates the operating system never detected the hardware, so a driver cannot be loaded or outdated—drivers only apply after enumeration. Option B is wrong because a BIOS-disabled webcam would still appear in Device Manager as a hidden or disabled device (often with a yellow exclamation mark), not be completely absent. Option D is wrong because reinstalling the operating system would not fix a hardware-level detection failure; the OS cannot enumerate a device that is not responding on the USB bus.

Full explanation →

830

MCQeasy

A customer reports that their desktop PC randomly shuts down when playing a graphically intensive game. The system has a 500W power supply, a high-end GPU, and a CPU with a 125W TDP. What is the most likely cause of the shutdowns?

A.The GPU is overheating due to poor case airflow.

B.The power supply is undersized for the system's peak power demands.

C.The motherboard's VRM is failing due to age.

D.The RAM is faulty causing memory errors during gaming.

AnswerB

Under heavy load, such as during gaming, high-end GPUs and CPUs can draw significant power, potentially exceeding the continuous or peak wattage rating of an undersized power supply unit (PSU). When the system's power demand surpasses the PSU's capacity, its internal overcurrent protection (OCP) or overpower protection (OPP) circuitry will trip, causing an immediate and complete system shutdown to prevent damage, often without any prior error messages or warnings.

Why this answer

The random shutdowns under load suggest the power supply cannot deliver enough wattage to sustain peak power draw from the GPU and CPU. A 500W PSU may be insufficient for a high-end gaming system, causing voltage drops or thermal overload protection to trigger. Upgrading to a higher-wattage PSU with adequate +12V rail capacity would resolve the issue.

Full explanation →

831

MCQeasy

After installing a new graphics card, a user's display shows distorted colors and random artifacts during boot. The system POSTs successfully. Which of the following is the most likely cause?

A.The monitor is incompatible with the new card

B.The graphics card driver is outdated

C.The power supply unit is insufficient for the new card

D.The display cable is loose

AnswerC

Modern graphics cards are often the most power-hungry component in a computer system, requiring substantial wattage, particularly from the power supply unit's (PSU) 12V rail. If the PSU cannot consistently deliver the required power, especially under the load of the new GPU, the card will operate unstably. This instability manifests as visual artifacts, color distortion, freezing, or system crashes, as the GPU's processing units and memory receive insufficient or fluctuating power, leading to rendering errors.

Why this answer

Artifacts and color distortion after a new GPU install typically point to insufficient power delivery or a faulty card. Since the system POSTs, it's not a complete failure but likely a power or driver issue. The correct answer highlights that the power supply may not meet the card's requirements, causing instability.

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832

MCQmedium

A technician is configuring a new all-in-one PC for a graphic designer. The designer needs to calibrate the display for accurate color reproduction. Which technology should the technician ensure the monitor supports?

A.TN panel with 144Hz refresh rate

B.IPS panel with high color gamut

C.VA panel with high contrast ratio

D.OLED panel with burn-in protection

AnswerB

An IPS panel with high colour gamut covers a wider portion of colour spaces such as Adobe RGB, enabling accurate colour reproduction after calibration. This directly satisfies the designer's requirement for dependable colour fidelity, which standard-gamut panels cannot guarantee.

Why this answer

An IPS (In-Plane Switching) panel with a high color gamut (e.g., sRGB, Adobe RGB, or DCI-P3 coverage) is essential for accurate color reproduction. IPS technology provides consistent color and brightness across wide viewing angles, which is critical for graphic design work where color fidelity is paramount. High color gamut ensures the display can reproduce a broader range of colors, meeting professional calibration standards.

Exam trap

The trap here is that candidates may confuse high refresh rate (144Hz) or high contrast ratio (VA) with color accuracy, but CompTIA A+ tests the specific requirement for graphic design: IPS panels are the industry standard for color-critical work due to their wide viewing angles and consistent color reproduction.

How to eliminate wrong answers

Option A is wrong because a TN (Twisted Nematic) panel, even with a 144Hz refresh rate, is designed for fast response times in gaming, not for color accuracy; TN panels typically have poor color reproduction and narrow viewing angles. Option C is wrong because a VA (Vertical Alignment) panel, while offering high contrast ratios for deep blacks, suffers from color shift at off-angles and lower color accuracy compared to IPS, making it unsuitable for precise color calibration. Option D is wrong because OLED panels, despite excellent color and contrast, are prone to burn-in over time, and the question asks for a technology that supports calibration for accurate color reproduction, not burn-in protection; IPS is the standard for color-critical work.

Full explanation →

833

MCQeasy

A customer reports that their desktop computer randomly shuts down when they run video editing software. The system has a high-end GPU and 32 GB of RAM. During troubleshooting, you notice the CPU temperature quickly rises to 95°C under load. Which of the following is the most likely cause?

A.Insufficient power supply wattage

B.Faulty RAM module

C.CPU cooler fan failure or poor thermal paste application

D.Outdated BIOS firmware

AnswerC

A CPU cooler fan failure directly prevents the active removal of heat from the CPU's heatsink, causing heat to build up rapidly. Similarly, dried, cracked, or improperly applied thermal paste creates an inefficient thermal interface between the CPU's Integrated Heat Spreader (IHS) and the heatsink, severely impeding the transfer of heat away from the processor. Both scenarios lead to the CPU quickly exceeding its safe operating temperature, triggering thermal throttling or an emergency shutdown to prevent permanent hardware damage.

Why this answer

The CPU temperature rapidly reaching 95°C under load is a clear indicator of inadequate heat dissipation. This is most commonly caused by a failing CPU cooler fan or dried-out/improperly applied thermal paste, which prevents heat from transferring from the CPU to the heatsink. Since the system shuts down only under heavy load (video editing), the issue is thermal-related, not power or memory.

The high-end GPU and 32 GB RAM are irrelevant to the CPU temperature spike.

Exam trap

The trap here is that candidates might focus on the high-end GPU or 32 GB RAM and assume a power supply issue, but the key clue is the CPU temperature reaching 95°C, which directly points to a cooling problem. CompTIA often tests the ability to differentiate between power, memory, and thermal symptoms.

How to eliminate wrong answers

Option A is wrong because insufficient PSU wattage would typically cause shutdowns under any high-power scenario (e.g., gaming, booting) and would not directly cause CPU temperatures to spike to 95°C; PSU issues usually manifest as random reboots or failure to power on, not gradual overheating. Option B is wrong because faulty RAM would cause system instability, blue screens, or application crashes, not a rapid rise in CPU temperature under load. Option D is wrong because outdated BIOS firmware might cause compatibility issues or performance problems, but it would not cause the CPU to overheat under load; BIOS updates rarely fix thermal issues.

Full explanation →

834

MCQmedium

A small business is moving to a new office and wants to connect all their computers, printers, and a server. They have a limited budget and need a simple, wired network that does not require internet access initially. Which network type should they implement?

A.Wide Area Network (WAN)

B.Local Area Network (LAN)

C.Personal Area Network (PAN)

D.Metropolitan Area Network (MAN)

AnswerB

A Local Area Network interconnects computers, printers and a server within a single office using wired Ethernet, requiring no internet connectivity. It is inexpensive and simple, matching the budget and isolation constraints, unlike WAN, MAN or WLAN alternatives.

Why this answer

A Local Area Network (LAN) is the correct choice because it connects devices within a single physical location, such as an office, using wired Ethernet (IEEE 802.3) and switches. It requires no internet access and is cost-effective for a small business with a limited budget, as it only needs basic hardware like a switch and Cat5e/Cat6 cabling.

Exam trap

Candidates often confuse LAN and WAN by associating 'network' with internet access, overlooking that a LAN is sufficient for local connectivity without internet.

How to eliminate wrong answers

Option A is wrong because a Wide Area Network (WAN) connects geographically dispersed locations (e.g., offices in different cities) using leased lines or internet links, which is overkill and expensive for a single office. Option C is wrong because a Personal Area Network (PAN) covers a very short range (typically up to 10 meters) for personal devices like Bluetooth or USB, not for connecting multiple computers, printers, and a server in an office. Option D is wrong because a Metropolitan Area Network (MAN) spans a city or large campus, requiring higher-cost infrastructure like fiber optics, which exceeds the small business's budget and scope.

Full explanation →

835

MCQeasy

A technician is replacing a failed hard drive in a desktop PC. The user wants the fastest possible storage for the operating system and frequently used applications. The motherboard has available M.2 slots and SATA ports. Which of the following should the technician install?

A.A 5400 RPM SATA hard drive

B.An M.2 NVMe SSD

C.A 7200 RPM SATA hard drive

D.A SATA SSD

AnswerB

An M.2 NVMe SSD connects directly to the PCIe bus, delivering much higher throughput and lower latency than SATA SSDs or hard drives. This makes it the fastest option for booting the OS and launching applications. The motherboard has available M.2 slots, so this is the optimal choice for the user's performance requirement.

Why this answer

The user requires the fastest storage for the OS and applications. An M.2 NVMe SSD uses the PCIe interface, providing far greater speed than SATA SSDs or mechanical drives. Since the motherboard has M.2 slots, this is the correct choice to meet the performance need.

Exam trap

The trap here is selecting a SATA SSD because it is an SSD, without recognizing that NVMe over M.2 delivers substantially higher performance.

Full explanation →

836

MCQeasy

During a network upgrade, you need to identify which cable in a messy patch panel corresponds to a specific office wall jack. The cables are not labeled. Which tool should you use?

A.Cable tester

B.Toner probe

C.Multimeter

D.Loopback plug

AnswerB

A toner probe comprises a tone generator and inductive amplifier; clipping the generator to an unlabelled cable lets the amplifier trace that exact conductor to its far-end wall jack. This satisfies the unlabelled patch-panel constraint, unlike cable testers that only verify continuity of an already-identified run.

Why this answer

A toner probe (inductive amplifier and tone generator) is the correct tool for tracing an unlabeled cable from a patch panel to a specific wall jack. The tone generator injects a distinctive audio signal onto the wire pair, and the inductive probe detects that signal without requiring a direct electrical connection, allowing you to identify the correct cable even in a dense, messy bundle.

Exam trap

A common mistake on the CompTIA A+ exam is confusing a cable tester with a toner probe. The cable tester checks electrical continuity and wiring faults, not physical location, so candidates often incorrectly choose it for cable identification tasks.

How to eliminate wrong answers

Option A is wrong because a cable tester verifies wiring continuity, pinout, and faults (e.g., opens, shorts, miswires) but cannot identify which physical cable corresponds to a specific endpoint in a bundle. Option C is wrong because a multimeter measures voltage, resistance, and continuity but cannot inject a traceable signal through a live network cable to identify it among many. Option D is wrong because a loopback plug is used to test a network interface by reflecting transmitted signals back to the sender, not for tracing or identifying cables.

Full explanation →

837

MCQhard

A user reports that their laser printer occasionally prints pages with a faint ghost image of the previous page. The ghost image appears about 2 inches below the current content. What is the most likely cause?

A.The toner cartridge is low

B.The fuser is overheating

C.The drum cleaning blade is worn

D.The paper is damp

AnswerC

A worn or damaged drum cleaning blade is a direct cause of ghosting because it fails to adequately scrape residual toner from the photosensitive drum after each print cycle. This leftover toner remains on the drum's surface and is then picked up by the electrostatic charge for the subsequent page, resulting in a faint, repeated image from the previous print job appearing on the current page. The ineffective cleaning allows the previous image to partially transfer again.

Why this answer

A ghost image repeating at a fixed interval (about 2 inches) is typically caused by the drum cleaning blade failing to remove residual toner from the previous rotation. The drum retains a latent image that gets transferred to the next page, creating a ghost. A worn cleaning blade is the most likely cause.

Exam trap

220-1201 often tests the ability to distinguish between print defects: candidates may confuse ghosting with fuser issues or low toner, but the repeating pattern at a fixed interval points specifically to the drum cleaning blade.

How to eliminate wrong answers

Option A is wrong because a low toner cartridge would cause faint or missing print overall, not a repeating ghost image of previous content. Option B is wrong because an overheating fuser can cause smearing or offsetting, but the ghost image pattern is characteristic of drum cleaning issues, not fuser temperature. Option D is wrong because damp paper causes wavy or curled pages and poor toner adhesion, not a ghost image repeating at a fixed distance.

Full explanation →

838

MCQeasy

A user reports that their laptop screen flickers intermittently, but the flickering stops when they adjust the screen angle. What is the most likely hardware issue?

A.A failing backlight LED

B.A defective graphics chip

C.A loose or damaged display cable

D.Incorrect display refresh rate setting

AnswerC

A loose or damaged display cable, often an internal ribbon cable (e.g., LVDS or eDP), is a very common cause of intermittent screen flickering or distortion that changes with the laptop's screen angle. As the screen is opened, closed, or adjusted, the cable can be stressed or temporarily lose its connection to either the motherboard or the display panel. This disruption in the video signal path leads to the observed flickering, color shifts, or temporary loss of display until the connection is momentarily re-established by further movement.

Why this answer

Intermittent flickering that changes with screen angle is the classic symptom of a loose or damaged display cable (typically the LVDS or eDP ribbon cable connecting the motherboard to the LCD panel). Adjusting the hinge flexes the cable, temporarily restoring or breaking the connection, which is why the symptom correlates with angle. This is a mechanical/connection fault, not a component failure.

Exam trap

The trap is jumping to 'graphics chip' or 'backlight' because those sound like display failures — but the key diagnostic clue is that the symptom changes with physical screen angle, which points to a mechanical cable fault, not an electronic component failure.

How to eliminate wrong answers

Option A is wrong because a failing backlight LED typically causes dimming, uneven brightness, or a completely dark screen with faint image visible under a flashlight — not angle-dependent flickering. Option B is wrong because a defective graphics chip usually produces artifacts, driver crashes, or no display at all, and the symptom would not correlate with physical screen angle. Option D is wrong because an incorrect refresh rate causes constant flicker or banding regardless of screen position, and modern laptops auto-negotiate refresh rates.

Full explanation →

839

MCQmedium

A technician is configuring a new VM for a developer who needs to test software on Windows 10. The host runs Hyper-V on Windows Server 2019. The developer requests that the VM have 8 GB RAM and 4 virtual CPUs. After creating the VM, the technician finds that the VM will not start and displays an error: 'The virtual machine could not be started because the hypervisor is not running.' What is the most likely solution?

A.Install the latest Windows updates and reboot the host.

B.Enable Intel VT-x or AMD-V in the host’s BIOS/UEFI settings.

C.Change the VM’s generation from Generation 2 to Generation 1.

D.Reinstall the Hyper-V role from Server Manager.

AnswerB

Intel VT-x and AMD-V are crucial hardware virtualization extensions built into modern CPUs, providing the necessary capabilities for a Type 1 hypervisor like Hyper-V to function efficiently. These extensions allow the hypervisor to directly manage virtual machines and isolate them from the host, ensuring optimal performance and security. If these features are disabled in the host's BIOS/UEFI settings, Hyper-V cannot initialize or run any virtual machines, making their activation a mandatory first step.

Why this answer

The error 'The virtual machine could not be started because the hypervisor is not running' indicates that the host's CPU virtualization extensions (Intel VT-x or AMD-V) are not enabled in the BIOS/UEFI. Hyper-V requires these hardware features to run. Enabling them in the firmware settings is the most likely solution.

This is a common issue when setting up Hyper-V on a new host.

Exam trap

220-1201 often tests hardware virtualization requirements, and candidates may overlook BIOS/UEFI settings, instead choosing to reinstall Hyper-V or change VM generation, which do not address the root cause.

How to eliminate wrong answers

Option A is wrong because installing Windows updates and rebooting will not enable CPU virtualization extensions if they are disabled in the BIOS/UEFI. Option C is wrong because changing the VM generation from Generation 2 to Generation 1 does not address the hypervisor not running; it only changes the VM's firmware and device support. Option D is wrong because reinstalling the Hyper-V role is unnecessary and will not resolve the issue if virtualization is disabled in the BIOS/UEFI.

Full explanation →

840

MCQeasy

A technician is setting up a new file server with four 4 TB SATA SSDs. The customer requires maximum read performance and fault tolerance for up to two drive failures. Which RAID level should the technician choose?

A.RAID 0

B.RAID 1

C.RAID 5

D.RAID 6

AnswerD

RAID 6 employs block-level striping with dual distributed parity, meaning it writes two independent parity blocks for each data stripe across the drives. This robust design allows the array to withstand the simultaneous failure of any two drives without data loss, providing a higher level of fault tolerance than RAID 5. While it incurs a greater capacity overhead and slightly reduced write performance compared to RAID 5 due to the extra parity calculations, its ability to survive two drive failures makes it the ideal choice for critical file servers.

Why this answer

RAID 6 uses dual parity, which allows the array to survive up to two simultaneous drive failures while still providing read performance improvements through striping. With four 4 TB SSDs, RAID 6 delivers fault tolerance for two failures and better read performance than RAID 1 or RAID 5, matching the customer's requirements exactly.

Exam trap

The trap here is confusing RAID 5 (single parity, one failure) with RAID 6 (dual parity, two failures) — candidates often pick RAID 5 because it is more common, but the requirement for two drive failures specifically points to RAID 6.

How to eliminate wrong answers

Option A is wrong because RAID 0 provides no fault tolerance at all — a single drive failure destroys the entire array, which contradicts the requirement for up to two drive failures. Option B is wrong because RAID 1 mirrors data and can only tolerate one drive failure (and with four drives, it would typically be configured as two mirrors, still only one failure per mirror). Option C is wrong because RAID 5 uses single parity and can only survive one drive failure, not two.

Full explanation →

841

MCQhard

A user complains that their external monitor connected via VGA shows a slightly blurry image with faint horizontal lines. The monitor works perfectly with another computer using the same VGA cable. What is the most likely cause?

A.The monitor's resolution is set too high for VGA

B.There is a ground loop between the computer and monitor

C.The VGA port on the computer has bent pins

D.The graphics driver is corrupt

AnswerB

A ground loop occurs when two pieces of equipment, such as a computer and monitor, are connected to different ground potentials, creating an unintended circuit through the signal cable's ground path. This current flow induces electromagnetic interference directly into the analog VGA signal lines, manifesting as visible artifacts such as horizontal scrolling bars, waves, or a general blurriness and distortion across the display. This specific type of electrical noise is a classic cause of the described symptoms in analog video connections.

Why this answer

The faint horizontal lines and blurry image are classic symptoms of a ground loop, where a difference in electrical potential between the computer and monitor causes interference on the analog VGA signal. Since the monitor works perfectly with another computer using the same cable, the cable and monitor are exonerated, isolating the issue to the computer's grounding or power supply.

Exam trap

CompTIA often tests the distinction between analog interference (ground loops) and digital signal issues (bent pins, driver corruption), trapping candidates who assume any display artifact must be a hardware or driver problem rather than an electrical one.

How to eliminate wrong answers

Option A is wrong because setting the resolution too high for VGA would typically cause a completely missing or scrambled image, not faint horizontal lines, and VGA can support resolutions like 1920x1080 without such artifacts. Option C is wrong because bent pins would cause missing colors, a complete loss of signal, or a distorted image, not faint horizontal lines, and the cable works fine on another computer. Option D is wrong because a corrupt graphics driver would cause system-wide display issues like artifacts, crashes, or incorrect resolutions, not a stable but blurry image with horizontal lines specific to an external monitor.

Full explanation →

842

MCQmedium

A user reports that their monitor displays a distorted image with wavy lines. The monitor uses a VGA connection. The technician checks the cable and finds it is not fully tightened. After securing the thumbscrews, the image is still distorted. What is the most likely cause?

A.The monitor's refresh rate is set too high

B.The VGA cable has a broken pin

C.The graphics driver needs to be updated

D.The monitor's power cable is loose

AnswerB

A VGA (Video Graphics Array) cable transmits analog video signals, including separate red, green, and blue color channels, along with horizontal and vertical sync signals. A broken or bent pin can interrupt one or more of these critical signal paths, leading to a loss of color information, incorrect synchronization, or signal interference. This disruption directly manifests as a distorted image, such as wavy lines, color shifts, or ghosting, because the monitor receives an incomplete or corrupted video stream.

Why this answer

VGA is an analog signal and can suffer from interference. Damaged or loose pins in the VGA connector can cause distortion even if the cable appears secure. The pins may be bent or broken.

Full explanation →

843

MCQmedium

During a deployment of a new multifunction printer, the technician needs to ensure the device can scan documents directly to a shared network folder on a Windows server. Which protocol must be configured on the printer to support this?

A.FTP

B.SNMP

C.SMB

D.SMTP

AnswerC

SMB, or Server Message Block, is the core network file-sharing protocol utilized by Microsoft Windows operating systems for sharing files, printers, and other resources across a network. When a multifunction printer is configured to scan documents directly to a network folder, it uses SMB to establish a connection with the target server or workstation. The printer then authenticates using provided credentials and deposits the scanned document into the specified shared directory, making it the native, most efficient, and widely adopted solution for integrating with Windows-based file shares.

Why this answer

This question tests knowledge of network protocols used for scanning to a network folder. SMB (Server Message Block) is the standard protocol for file sharing in Windows environments. FTP or email would require additional services, and SNMP is for management only.

Full explanation →

844

MCQmedium

A user reports that their internet connection is extremely slow, and they notice the modem's 'DSL' light is blinking. They have a DSL connection. What does the blinking DSL light indicate?

A.The modem is receiving data.

B.The modem is not connected to the phone line.

C.The modem is trying to establish a DSL sync.

D.The modem has a firmware error.

AnswerC

A blinking DSL light is the primary indicator that the Digital Subscriber Line (DSL) modem is actively engaged in the synchronization process with the Digital Subscriber Line Access Multiplexer (DSLAM) at the central office. During this phase, the modem is attempting to establish a stable physical layer connection by negotiating frequencies, data rates, and error correction protocols, which is a prerequisite for any internet traffic.

Why this answer

A blinking DSL light on a modem indicates that the modem is actively attempting to establish synchronization (sync) with the DSLAM (Digital Subscriber Line Access Multiplexer) at the provider's central office. This process involves training the line to negotiate a stable connection speed and protocol, such as ADSL or VDSL, and typically takes 30–60 seconds. A solid DSL light confirms successful sync, while a blinking light means the handshake is still in progress or has failed.

Exam trap

The CompTIA A+ exam often tests the distinction between a blinking light (indicating an active process like sync negotiation) and a solid light (indicating a stable connection), leading candidates to confuse it with data activity or a simple cable fault.

How to eliminate wrong answers

Option A is wrong because a blinking DSL light does not indicate data reception; data activity is shown by the 'Internet' or 'Data' LED, not the DSL sync light. Option B is wrong because if the modem were not connected to the phone line, the DSL light would typically be off entirely, not blinking; a blinking light implies the modem is detecting electrical signals on the line but cannot complete the sync process. Option D is wrong because a firmware error would usually cause the modem to fail to boot or show a different pattern (e.g., all lights flashing or no lights), not a specific blinking DSL light during the sync attempt.

Full explanation →

845

MCQeasy

A user reports that their wired connection is intermittent. They are using a Cat5e cable connected to a 1000BASE-T switch. The link light on the switch port is blinking rapidly. What is the most likely cause of the intermittent connection?

A.The switch port is set to half-duplex

B.The cable is damaged or has a loose connector

C.The network card is configured for 10 Mbps

D.The switch is overloaded with traffic

AnswerB

A damaged Ethernet cable, such as one with internal wire breaks or kinks, or a connector that is not fully seated or has bent pins, directly impacts the physical layer's ability to maintain a stable electrical signal. This physical compromise can cause the network link to repeatedly drop and re-establish, leading to intermittent connectivity. The rapid blinking or flickering of the link light on both the network card and the switch port is a strong indicator of this unstable physical connection as the devices attempt to negotiate and maintain the link.

Why this answer

A rapidly blinking link light typically indicates active data transmission, but when paired with an intermittent connection, it often points to physical-layer issues. A damaged Cat5e cable or loose connector can cause frequent link flaps and CRC errors, leading to the rapid blinking as the switch repeatedly attempts to re-establish the link. This is the most likely cause because the symptom (blinking link light) aligns with physical-layer problems rather than configuration or load issues.

Exam trap

The trap here is that candidates often associate a blinking link light with traffic activity, but in this context, the rapid blinking indicates link flapping due to physical-layer issues, not normal data transmission.

How to eliminate wrong answers

Option A is wrong because half-duplex on a 1000BASE-T link would cause excessive collisions and late collisions, not a rapidly blinking link light; the switch would likely show a steady link light with high error counts. Option C is wrong because a network card configured for 10 Mbps would still establish a link at that speed, and the switch port would auto-negotiate down to 10 Mbps, resulting in a steady link light (not rapid blinking) unless there is a duplex mismatch. Option D is wrong because an overloaded switch would cause packet drops and high latency, but the link light would remain solid (not blink rapidly) as the physical link remains stable; rapid blinking specifically indicates link state changes.

Full explanation →

846

MCQhard

A technician is configuring a router with two interfaces: WAN (DHCP from ISP) and LAN (static IP 10.0.0.1/24). The technician sets the LAN subnet mask to 255.255.255.0. A workstation is assigned IP 10.0.0.100/24 and can ping the router, but cannot access the internet. The router's WAN interface has IP 203.0.113.5/30. What is the most likely missing configuration?

A.The workstation's default gateway is set to 10.0.0.1.

B.The router lacks a default route pointing to the ISP's gateway.

C.The WAN subnet mask should be 255.255.255.0.

D.The LAN subnet mask should be 255.255.0.0.

AnswerB

This is the correct answer. A router requires a default route, typically configured as 0.0.0.0/0, to direct all traffic for networks not explicitly defined in its routing table. Without this crucial entry, the router cannot determine the next hop for external internet-bound traffic, even if its WAN interface has a valid IP address and can communicate with the ISP's gateway. Consequently, devices on the LAN would be unable to access the internet.

Why this answer

The workstation can ping the router's LAN interface (10.0.0.1), confirming Layer 2 and basic IP connectivity on the LAN. However, for the workstation to reach the internet, the router must have a default route (0.0.0.0/0) pointing to the ISP's next-hop gateway (likely 203.0.113.6, the other end of the /30 WAN link). Without this route, the router does not know where to forward packets destined for external networks, even though the WAN interface has a valid IP from DHCP.

Exam trap

The 220-1201 exam often tests the misconception that a workstation being able to ping the router's LAN interface implies full internet connectivity, when in fact the router itself lacks a route to forward traffic beyond its directly connected networks.

How to eliminate wrong answers

Option A is wrong because the workstation's default gateway is already correctly set to 10.0.0.1 (the router's LAN IP), which is why the workstation can ping the router; this is not the missing piece. Option C is wrong because the WAN subnet mask of 255.255.255.252 (/30) is correct for a point-to-point link with only two usable addresses (203.0.113.5 and 203.0.113.6), and changing it to 255.255.255.0 would cause routing and broadcast issues. Option D is wrong because the LAN subnet mask of 255.255.255.0 (/24) is appropriate for the 10.0.0.0/24 network; using 255.255.0.0 would expand the broadcast domain unnecessarily and could cause the workstation to ARP for addresses outside the local subnet.

Full explanation →

847

MCQeasy

A customer says their external hard drive is not recognized by their laptop. The drive uses a USB-C connector and the laptop has both USB-A and USB-C ports. Which connector type should be used to ensure the fastest possible data transfer?

A.USB-A to USB-B cable

B.USB-C to USB-C cable

C.USB-A to USB-C adapter

D.Micro-USB to USB-C cable

AnswerB

A USB-C to USB-C cable provides the optimal and most direct connection for an external hard drive to a laptop equipped with a USB-C port. This configuration leverages the full capabilities of the USB-C standard, supporting the fastest available data transfer speeds (e.g., USB 3.2 Gen 2 or higher) and often power delivery, ensuring efficient and high-performance operation. Its reversible design also simplifies connection, making it the most suitable choice for modern external storage devices.

Why this answer

A USB-C to USB-C cable connects the drive directly to the laptop's USB-C port, which supports the highest USB data rates (USB 3.2 Gen 2 at 10 Gbps, or USB4/Thunderbolt at 40 Gbps depending on the port). Using native USB-C on both ends avoids the bandwidth and protocol limitations of adapters and legacy connectors. This is the correct choice for fastest possible transfer.

Exam trap

220-1201 often tests the misconception that any USB-C cable or adapter delivers the same speed, when in fact the connector is speed-agnostic and the port, cable rating, and controller determine actual throughput.

How to eliminate wrong answers

Option A is wrong because USB-B is a legacy printer/scanner connector and is not used by modern external hard drives; it also caps at USB 2.0 or older USB 3.0 speeds depending on the variant. Option C is wrong because a USB-A to USB-C adapter forces the connection through a USB-A port, which is typically limited to USB 3.0 (5 Gbps) or USB 2.0 (480 Mbps) and adds a conversion point. Option D is wrong because Micro-USB is an older, slower connector (USB 2.0, 480 Mbps) and is not native to a USB-C drive — using it would require an adapter and severely limit throughput.

Full explanation →

848

MCQhard

A company deploys tablets for inventory management. The tablets need to connect to a Bluetooth barcode scanner and also sync data to a cloud server over Wi-Fi. The Bluetooth connection drops every few minutes. What is the most likely cause?

A.The barcode scanner's battery is low.

B.The tablets are too far from the barcode scanner.

C.Wi-Fi and Bluetooth are interfering because both use the 2.4 GHz band.

D.The cloud server is not responding to sync requests.

AnswerC

Both Wi-Fi (specifically 802.11b/g/n) and Bluetooth devices operate within the crowded 2.4 GHz Industrial, Scientific, and Medical (ISM) radio band. When multiple devices, especially high-bandwidth Wi-Fi, are actively transmitting in close proximity, their signals can interfere with each other, leading to packet collisions, increased retransmissions, and temporary loss of Bluetooth connectivity. This electromagnetic interference often manifests as intermittent drops and reconnections as the devices struggle to maintain a stable link amidst the noise.

Why this answer

The most likely cause is that both Wi-Fi and Bluetooth operate in the 2.4 GHz ISM band, and when a tablet is actively using Wi-Fi to sync data to a cloud server, the radio can cause interference with the Bluetooth signal, leading to periodic disconnections. This is a well-known coexistence issue, especially in dense environments where both radios are active simultaneously.

Exam trap

The 220-1201 exam often tests the misconception that Bluetooth and Wi-Fi are completely independent radios, when in fact they share the same 2.4 GHz spectrum and can interfere with each other, especially when both are active simultaneously.

How to eliminate wrong answers

Option A is wrong because a low battery on the barcode scanner would typically cause a gradual degradation of range or a complete shutdown, not a periodic drop every few minutes. Option B is wrong because the tablets are deployed for inventory management and are presumably within the typical 10-meter Class 2 Bluetooth range; the intermittent nature of the drop points to interference rather than a static distance issue. Option D is wrong because the cloud server not responding would affect data sync, not the Bluetooth connection between the tablet and the scanner; the Bluetooth link is independent of cloud server availability.

Full explanation →

849

MCQmedium

A user reports that they can send emails but cannot receive any. The email client is configured with SMTP for outgoing and POP3 for incoming. The server is reachable. Which port is most likely blocked on the firewall for the incoming mail protocol?

A.Port 25

B.Port 110

C.Port 443

D.Port 53

AnswerB

Port 110 carries POP3, the incoming protocol named in the stem, so blocking it prevents retrieval while SMTP on port 25 still sends. The server being reachable rules out connectivity faults, isolating the firewall rule as the cause. Port 995 would apply only to POP3S, which the client is not configured to use.

Why this answer

The user can send emails (SMTP works) but cannot receive them, and the incoming protocol is POP3. POP3 uses port 110 by default. Since the server is reachable, a firewall blocking port 110 would prevent the email client from retrieving incoming messages, while SMTP on port 25 remains unaffected.

Exam trap

CompTIA often tests the distinction between SMTP (port 25) and POP3 (port 110) by describing a scenario where only one direction of email flow is broken, leading candidates to mistakenly focus on the outgoing port.

How to eliminate wrong answers

Option A is wrong because port 25 is used for SMTP (outgoing mail), and the user can already send emails, so this port is not blocked. Option C is wrong because port 443 is used for HTTPS (secure web traffic), not for POP3 or email retrieval. Option D is wrong because port 53 is used for DNS (domain name resolution), not for incoming mail protocols.

Full explanation →

850

MCQhard

A company's file server uses a RAID 5 array with five 4 TB hard drives. One drive fails and is replaced. During the rebuild, the server crashes and the RAID controller reports that the array is 'Failed'. What is the most likely reason for this catastrophic failure?

A.The new drive was not properly formatted before installation.

B.The RAID controller cache battery is dead.

C.A second drive failed during the rebuild process.

D.The rebuild was attempted while the server was under heavy load.

AnswerC

RAID 5 arrays are designed with single-drive fault tolerance, meaning they can continue operating with one failed drive by reconstructing data from parity and remaining disks. However, if a second drive fails *during* the rebuild process, the array loses its ability to reconstruct the missing data. With two drives simultaneously unavailable (the original failed drive and the new failure), the array's data redundancy is completely compromised, leading to total array failure and data loss.

Why this answer

The most likely reason is that a second drive failed during the rebuild process. RAID 5 can tolerate only one drive failure; if another drive fails while the array is rebuilding (which is a high-stress operation), the array becomes failed and data is lost. This is a common catastrophic failure scenario in RAID 5.

Exam trap

The trap is assuming that the rebuild process itself is safe and that other factors like formatting or battery are to blame; candidates might overlook the possibility of a second drive failure during the vulnerable rebuild period.

How to eliminate wrong answers

Option A is wrong because a new drive does not need to be formatted before installation in a RAID array; the RAID controller initializes it as part of the rebuild. Option B is wrong because a dead RAID controller cache battery typically affects write caching performance and may disable write-back caching, but it does not cause the array to fail during rebuild. Option D is wrong because heavy load might slow down the rebuild but does not directly cause a catastrophic failure; the array can still rebuild under load, though performance may degrade.

Full explanation →

851

MCQmedium

A technician is troubleshooting a smartphone that can send and receive text messages but cannot make or receive phone calls. The device shows full signal bars. Which network setting is most likely misconfigured?

A.The device's data roaming is turned off.

B.The device's preferred network type is set to 'LTE only' and VoLTE is disabled.

C.The device's Bluetooth is enabled.

D.The device's airplane mode is turned on.

AnswerB

Modern LTE networks are primarily designed for high-speed data transmission. For voice calls, many networks rely on Voice over LTE (VoLTE) to carry voice traffic as data packets over the LTE network. If VoLTE is disabled, and the device is configured for 'LTE only,' it cannot fall back to older 3G (UMTS/HSPA) or 2G (GSM/GPRS/EDGE) networks for circuit-switched voice calls. This configuration effectively prevents the device from initiating or receiving voice calls while still allowing data services and SMS over LTE.

Why this answer

When a smartphone shows full signal bars but cannot make or receive voice calls while SMS works, the most likely cause is that the device is set to 'LTE only' as its preferred network type and VoLTE (Voice over LTE) is disabled. SMS can be carried over LTE via IMS (IP Multimedia Subsystem) or fallback to circuit-switched networks, but voice calls require either VoLTE or a circuit-switched fallback (CSFB) to 2G/3G. With 'LTE only' selected and VoLTE off, the device cannot initiate or accept voice calls because it lacks a circuit-switched connection and has no fallback path.

Exam trap

The 220-1201 exam often tests the misconception that full signal bars guarantee voice call capability, but the trap here is that signal bars only indicate LTE signal strength, not the availability of a voice-capable network layer (circuit-switched or IMS).

How to eliminate wrong answers

Option A is wrong because data roaming controls cellular data usage when outside the home network; it does not affect voice call capability on the home network or when roaming, and SMS/voice are independent of data roaming settings. Option C is wrong because Bluetooth is a short-range wireless technology for peripherals (headsets, speakers) and does not impact the device's ability to make or receive cellular voice calls. Option D is wrong because enabling airplane mode disables all wireless radios (cellular, Wi-Fi, Bluetooth), which would prevent both SMS and calls, contradicting the symptom that SMS works.

Full explanation →

852

MCQmedium

A company is deploying 10 Gigabit Ethernet in a data center and needs cabling that supports this speed over a distance of 50 meters. Which cable type should be selected?

A.Cat5e

B.Cat6

C.Cat6a

D.Cat3

AnswerC

Category 6a (Cat6a), or Augmented Category 6, is specifically engineered to support 10 Gigabit Ethernet (10 Gbps) over its full specified distance of 100 meters. This enhanced performance is achieved through improved shielding and tighter twists, which significantly reduce alien crosstalk and improve signal-to-noise ratio at higher frequencies. For a 50-meter run in a data center, Cat6a provides ample headroom, ensuring reliable, high-performance connectivity and future-proofing the infrastructure for demanding applications.

Why this answer

Cat6a (Augmented Category 6) cabling is the correct choice because it supports 10 Gigabit Ethernet (10GBASE-T) over distances up to 100 meters, easily covering the required 50 meters. Cat6a uses thicker insulation and tighter twists to reduce alien crosstalk, which is critical for maintaining signal integrity at 10 Gbps over longer runs.

Exam trap

CompTIA often tests the misconception that Cat6 is sufficient for 10GBASE-T at any distance, but the trap is that Cat6 only supports 10 Gbps up to 55 meters under strict conditions, while Cat6a is the guaranteed standard for 100 meters.

How to eliminate wrong answers

Option A is wrong because Cat5e is rated only for 1000BASE-T (1 Gbps) up to 100 meters and cannot reliably support 10 Gigabit Ethernet at any distance. Option B is wrong because Cat6 supports 10GBASE-T only up to 55 meters under ideal conditions, but it is not guaranteed at 50 meters due to alien crosstalk issues, making Cat6a the safer and standards-compliant choice. Option D is wrong because Cat3 is an obsolete category designed for 10BASE-T (10 Mbps) and cannot handle any modern Gigabit or 10 Gigabit Ethernet speeds.

Full explanation →

853

MCQmedium

A technician is troubleshooting a network where a user cannot access the internet. The user's workstation has an IP of 192.168.1.15, subnet mask 255.255.255.0, and default gateway 192.168.1.1. The technician pings 192.168.1.1 successfully but cannot ping 8.8.8.8. What is the most likely cause?

A.The workstation's subnet mask is incorrect.

B.The router's WAN connection is down or misconfigured.

C.The DNS server is not configured on the workstation.

D.The workstation's IP address is a duplicate.

AnswerB

Since the technician successfully pinged the local default gateway, the workstation has established local network connectivity. However, the failure to ping an external IP address like 8.8.8.8 indicates that while the workstation can reach its router, the router itself cannot forward traffic beyond its local network to the internet. This points directly to an issue with the router's Wide Area Network (WAN) interface or its configuration, preventing external access.

Why this answer

Successful pings to the default gateway (192.168.1.1) confirm that Layer 2 and Layer 3 connectivity within the local subnet is working, and that the workstation's IP, subnet mask, and default gateway are correctly configured. Failure to ping 8.8.8.8 (a public IP) indicates that traffic is not being routed beyond the local network, which points to an issue with the router's WAN connection or its routing configuration to the internet.

Exam trap

The 220-1201 exam often tests the distinction between local connectivity (gateway reachable) and external connectivity (WAN/routing issue), leading candidates to incorrectly blame workstation configuration when the problem is upstream.

How to eliminate wrong answers

Option A is wrong because the subnet mask 255.255.255.0 is correct for the 192.168.1.0/24 network, and a mismatch would prevent pinging the gateway, which succeeded. Option C is wrong because DNS is used for name resolution, not for IP-level connectivity; pinging 8.8.8.8 by IP address bypasses DNS entirely. Option D is wrong because an IP address duplicate would cause intermittent connectivity and ARP conflicts, but the successful ping to the gateway shows no such conflict on the local network.

Full explanation →

854

MCQmedium

A technician is configuring a new email server for a small business. Employees need to send and receive email from their desktop clients (Outlook) and also access email via a web browser. Which combination of protocols should the technician configure on the server to support both client types?

A.SMTP, POP3, and HTTP

B.FTP, SMTP, and DNS

C.IMAP, SNMP, and HTTPS

D.DHCP, SMTP, and POP3

AnswerA

SMTP (Simple Mail Transfer Protocol) is fundamental for sending and relaying outbound email messages between mail servers and from client applications to the server. POP3 (Post Office Protocol version 3) enables email clients to retrieve messages from a mail server, typically downloading them to the local device and often deleting them from the server. HTTP (Hypertext Transfer Protocol) provides the necessary foundation for webmail access, allowing users to manage their email through a standard web browser interface without needing a dedicated client application. Together, these three protocols cover the essential functions for a comprehensive email server: sending, client-based receiving, and web-based receiving.

Why this answer

SMTP is the standard protocol for sending outgoing email, POP3 allows desktop clients like Outlook to download and store emails locally, and HTTP enables web browser access to the email server (often via a webmail interface). This combination supports both client types: Outlook uses SMTP/POP3, while a browser uses HTTP to access the webmail service.

Exam trap

The exam often tests the misconception that IMAP is required for webmail access, but HTTP alone can serve a webmail interface, and POP3 is sufficient for desktop clients that do not need server-side folder synchronization.

How to eliminate wrong answers

Option B is wrong because FTP is used for file transfers, not email delivery or retrieval, and DNS resolves domain names but does not handle email sending or receiving. Option C is wrong because SNMP is a network management protocol for monitoring devices, not for email access; while IMAP is valid for email retrieval, SNMP is irrelevant here. Option D is wrong because DHCP assigns IP addresses dynamically and is not an email protocol; although SMTP and POP3 are correct for email, the inclusion of DHCP makes this combination invalid for the given requirement.

Full explanation →

855

MCQmedium

A technician is installing a new network switch in a server room. The switch has 48 ports and needs to connect to the existing network backbone via fiber optic cable. The technician has a 10GBASE-SR SFP+ module. Which type of fiber optic cable should be used to ensure compatibility?

A.Single-mode fiber (OS2)

B.Multimode fiber (OM3)

C.Cat6a twisted pair

D.Coaxial cable

AnswerB

Multimode fiber (OM3) is the correct choice for 10GBASE-SR connections because the 'SR' (Short Reach) standard is specifically designed to operate over multimode fiber. OM3 fiber is an optimized multimode fiber type that supports 10 Gigabit Ethernet transmission up to 300 meters, making it ideal for inter-building or intra-building connections within a data center or campus environment. Its larger core diameter allows for the use of less expensive LED or VCSEL light sources, which are typically found in 10GBASE-SR transceivers.

Why this answer

10GBASE-SR is a fiber optic standard that uses short-range multimode fiber, specifically designed for OM3 (or OM4) multimode cable with a maximum distance of 300 meters on OM3. The 'SR' designation stands for short reach, which is optimized for multimode fiber. Therefore, OM3 multimode fiber is the correct cable type for compatibility.

Exam trap

220-1201 often tests the confusion between fiber types and Ethernet standards, leading candidates to choose single-mode fiber for all fiber connections when the 'SR' designation specifically requires multimode.

How to eliminate wrong answers

Option A is wrong because single-mode fiber (OS2) is used with 10GBASE-LR or 10GBASE-ER modules, which use long-wavelength lasers; 10GBASE-SR uses short-wavelength VCSELs designed for multimode fiber, so single-mode would not work. Option C is wrong because Cat6a twisted pair is copper cabling used for 10GBASE-T, not for SFP+ fiber modules; the SFP+ module requires a fiber optic cable. Option D is wrong because coaxial cable is not used for 10GBASE-SR or any modern Ethernet SFP+ standard.

Full explanation →

856

MCQhard

A technician is repairing a tablet that has a cracked digitizer. The LCD panel is intact and displays correctly. After replacing the digitizer, the touch input is unresponsive. What is the most likely oversight?

A.The digitizer is not compatible with the tablet model.

B.The digitizer flex cable is not fully seated in the connector.

C.The LCD panel was damaged during the repair.

D.The tablet's touch controller needs to be calibrated.

AnswerB

A digitizer flex cable that is not fully seated in its ZIF (Zero Insertion Force) connector will fail to establish proper electrical contact, preventing the transmission of touch input signals to the tablet's main logic board. While the LCD panel may function perfectly, displaying images, the lack of a complete connection means the touch controller cannot receive data from the digitizer. Reseating the cable firmly into its connector is a primary troubleshooting step to restore touch functionality.

Why this answer

The digitizer flex cable must be fully seated and locked into its connector on the tablet's mainboard to establish electrical continuity for touch signals. If the cable is loose or not properly inserted, the touch controller cannot communicate with the digitizer, resulting in a completely unresponsive touch input despite the LCD display functioning correctly.

Exam trap

The CompTIA A+ exam often tests the misconception that a cracked digitizer implies LCD damage or that software calibration can fix a hardware connection issue, leading candidates to overlook the simple mechanical step of ensuring the flex cable is fully seated.

How to eliminate wrong answers

Option A is wrong because if the digitizer were incompatible, the tablet would likely not power on or would show other display anomalies, but the LCD panel works fine; compatibility issues usually manifest as incorrect touch mapping or no response at all, but the most common oversight after a successful physical replacement is a loose connection. Option C is wrong because the LCD panel is intact and displays correctly, so damaging it during repair would cause visual defects (e.g., lines, black spots, or no image), not a touch input issue. Option D is wrong because touch controller calibration is a software-level adjustment for accuracy, not a fix for a complete lack of touch response; if the digitizer is properly connected, the touch controller will detect input without calibration, and calibration is only needed for offset or sensitivity tuning.

Full explanation →

857

MCQeasy

A user reports that their Android smartphone's touchscreen is unresponsive after they dropped it. The screen is not cracked, and the device powers on normally. Which of the following is the most likely cause of the touchscreen issue?

A.The LCD panel is damaged

B.The digitizer is damaged

C.The battery is swollen

D.The operating system is corrupted

AnswerB

The digitizer is the crucial touch-sensitive layer, often integrated into the display assembly, responsible for detecting user input via touch. A physical impact, such as dropping the smartphone, can cause this layer to crack, delaminate, or suffer internal electrical damage, even if the outer glass appears intact. This damage directly prevents the screen from registering touch gestures, resulting in unresponsiveness despite the underlying display panel continuing to function and show images normally.

Why this answer

The digitizer is the transparent layer that converts physical touch into electrical signals the device interprets as input. A drop can damage the digitizer's conductive grid even when the outer glass and LCD remain intact, producing an unresponsive touchscreen on a device that still powers on and displays images. Because the LCD is separate and the screen is not cracked, the digitizer is the most likely failed component.

Exam trap

220-1201 often tests the difference between the LCD (image output) and the digitizer (touch input) — candidates who see 'screen not cracked' may wrongly assume the display is fine and jump to software or battery causes instead of isolating the touch layer.

How to eliminate wrong answers

Option A is wrong because a damaged LCD panel would manifest as visual defects — dead pixels, lines, discoloration, or a black screen — not as a working display with no touch response. Option C is wrong because a swollen battery typically causes the device to bulge, overheat, or shut down unexpectedly; it does not selectively disable touch input while leaving the display functional. Option D is wrong because OS corruption would usually present with boot loops, app crashes, or a frozen UI rather than a display that renders correctly but ignores all touch input.

Full explanation →

858

MCQeasy

A user has an iPhone that will not install a new app from the App Store, displaying a message that the app is 'unable to be installed'. The device has plenty of free storage. What should a technician check first?

A.Check if the app is compatible with the iOS version.

B.Verify that the Apple ID is not locked or restricted.

C.Reset the phone's network settings.

D.Perform a factory reset of the device.

AnswerB

A locked or restricted Apple ID directly impacts the ability to authenticate purchases and downloads from the App Store, even for free applications. When an Apple ID is compromised, has suspicious activity, or outstanding payment issues, Apple's security measures can temporarily or permanently restrict its functionality, preventing new app installations until the account status is resolved and verified. This is a common root cause for general installation failures.

Why this answer

When an iPhone has sufficient storage but fails to install an app with an 'unable to be installed' message, the most common cause is an issue with the Apple ID account, such as being locked, restricted, or having payment problems. Apple's App Store installation process requires a valid, unlocked Apple ID to authenticate the download and verify entitlements. Checking the Apple ID status is the first logical step before exploring other potential causes.

Exam trap

The 220-1201 exam often tests the candidate's ability to prioritize account-level checks over device-level troubleshooting when the error message is generic and storage is confirmed available, leading many to incorrectly jump to compatibility or network settings first.

How to eliminate wrong answers

Option A is wrong because app compatibility with the iOS version typically results in a 'requires iOS X or later' message, not a generic 'unable to be installed' error, and compatibility checks are secondary to account status. Option C is wrong because resetting network settings addresses connectivity issues like Wi-Fi or cellular data problems, but the error message indicates a failure at the installation authorization stage, not a network reachability problem. Option D is wrong because performing a factory reset is a drastic, last-resort troubleshooting step that erases all data and settings; it is not appropriate as a first check for an installation failure that is likely account-related.

Full explanation →

859

MCQmedium

A company's web server is hosted internally and must be accessible from the internet using the domain name www.company.com. The public IP address of the router is 203.0.113.5. Which two network services must be correctly configured to make this work?

A.DNS and DHCP

B.DNS and NAT

C.NAT and ARP

D.DHCP and NAT

AnswerB

DNS (Domain Name System) is essential for external clients to resolve the web server's domain name (e.g., example.com) into the public IP address assigned to the company's internet connection. Subsequently, Network Address Translation (NAT), specifically configured with port forwarding, is required to translate incoming requests on that public IP and specific port (like 80 for HTTP or 443 for HTTPS) to the private IP address and port of the internal web server. This combination ensures external traffic reaches the correct internal host.

Why this answer

DNS is required to resolve the domain name www.company.com to the public IP address 203.0.113.5, so external users can reach the router. NAT (specifically destination NAT or port forwarding) is needed to translate the public IP and port to the internal private IP address of the web server, allowing inbound traffic to reach the internal host.

Exam trap

A common misconception is that DHCP is required for internet access, but here the internal server already has a static IP; the key missing services are DNS for name resolution and NAT for address translation from public to private.

How to eliminate wrong answers

Option A is wrong because DHCP assigns IP addresses to internal clients but does not enable external access to an internal web server; DNS alone cannot route traffic into the internal network. Option C is wrong because ARP resolves IP addresses to MAC addresses on a local network segment, but it does not provide name resolution or translate public-to-private addresses for internet access. Option D is wrong because DHCP provides local IP configuration, not inbound translation or name resolution; NAT alone without DNS would not allow users to reach the server by domain name.

Full explanation →

860

MCQeasy

A user complains that text on their new 27-inch 4K monitor appears very small and hard to read. The display is set to its native resolution. What is the most effective way to make text readable without sacrificing image quality?

A.Reduce the screen resolution to 1920x1080

B.Increase the display scaling percentage in OS settings

C.Replace the monitor with a lower-resolution model

D.Adjust the monitor's physical sharpness setting

AnswerB

Increasing the display scaling percentage in the operating system settings is the correct and most effective solution. This feature allows the OS to render text, icons, and other UI elements at a larger logical size while maintaining the monitor's native resolution. By doing so, clarity and sharpness are preserved because each scaled element is still mapped directly to the physical pixels of the display, avoiding any interpolation artifacts and ensuring a crisp, readable visual experience.

Why this answer

At the native 4K resolution (3840x2160), pixels are densely packed, making UI elements physically tiny. Increasing the display scaling percentage (e.g., to 150% or 200%) instructs the OS to render text and icons at a larger logical size while keeping the monitor at its native resolution, preserving full sharpness and detail. This is the standard solution for high-DPI displays.

Exam trap

CompTIA often tests the misconception that reducing resolution is the only way to enlarge text, trapping candidates who overlook the scaling feature designed specifically for high-DPI displays.

How to eliminate wrong answers

Option A is wrong because reducing the resolution to 1920x1080 forces the monitor into a non-native mode, causing interpolation (blurring) and loss of image sharpness, which defeats the purpose of a 4K display. Option C is wrong because replacing the monitor is unnecessary and wasteful; scaling solves the readability issue without sacrificing the high-resolution benefits. Option D is wrong because the monitor's physical sharpness setting adjusts edge enhancement or contrast, not the size of UI elements; it cannot make text larger and may introduce artifacts.

Full explanation →

861

MCQeasy

A user reports that their new SSD is not recognized by the system. The drive is properly connected and powered. Which UEFI setting should be checked to ensure the drive is detected?

A.Enable Secure Boot

B.Set SATA mode to AHCI or RAID as appropriate

C.Disable the TPM chip

D.Change boot order to list the SSD first

AnswerB

Setting the SATA controller mode to AHCI (Advanced Host Controller Interface) or RAID is crucial for modern SSDs. AHCI mode enables advanced features like Native Command Queuing (NCQ) and hot-plugging, which are essential for optimal SSD performance and proper detection by the operating system and BIOS/UEFI. If the SATA controller is configured in an older 'IDE Compatibility' mode, the new SSD may not be recognized at all or may experience significant performance issues, appearing as if it is not present.

Why this answer

If an SSD is properly connected and powered but not detected, the most likely UEFI-level cause is that the SATA controller mode is set to a value incompatible with the drive's configuration, such as IDE when the drive was initialized under AHCI, or RAID when no array is configured. Setting the SATA mode to AHCI (or RAID if the drive is part of an array) allows the UEFI and OS to enumerate the drive correctly. This is the setting that directly controls storage controller detection.

Exam trap

220-1201 often tests storage detection by offering boot order and Secure Boot as distractors, causing candidates to confuse boot configuration with device enumeration.

How to eliminate wrong answers

Option A is wrong because Secure Boot validates bootloader signatures and does not affect whether a storage device is enumerated by the controller. Option C is wrong because the TPM chip is used for cryptographic operations and BitLocker key sealing; disabling it does not make an undetected SSD appear. Option D is wrong because boot order only determines which detected device the firmware attempts to boot from; it cannot make a drive that is not detected appear in the device list.

Full explanation →

862

MCQeasy

A company wants to consolidate five physical servers into one host to reduce power and cooling costs. Each server runs a different operating system. Which virtualization technology should be used to achieve this?

A.Install a Type 2 hypervisor on each physical server

B.Use a Type 1 hypervisor like VMware ESXi on a single host

C.Migrate all applications to a single OS using compatibility layers

D.Use containerization instead of virtualization

AnswerB

A Type 1 hypervisor, also known as a bare-metal hypervisor like VMware ESXi, Microsoft Hyper-V, or Citrix XenServer, installs directly onto the physical server hardware. This direct access to hardware resources allows it to efficiently manage and allocate CPU, memory, and storage to multiple virtual machines (VMs) running different operating systems simultaneously. By consolidating five physical servers into virtual machines on a single, powerful physical host, this approach significantly reduces hardware footprint, power consumption, and cooling costs while maintaining high performance and isolation for each virtualized server.

Why this answer

A Type 1 hypervisor like VMware ESXi runs directly on the host hardware and can host multiple virtual machines with different operating systems simultaneously, enabling consolidation of five physical servers onto one host. This reduces power and cooling costs by eliminating redundant hardware. Type 1 hypervisors are bare-metal and provide better performance and resource efficiency than Type 2 hypervisors, which run on top of an existing OS.

Exam trap

The trap here is confusing Type 1 and Type 2 hypervisors, where candidates might think a Type 2 hypervisor (e.g., VirtualBox) can consolidate servers, but it runs on an existing OS and is not suitable for production consolidation.

How to eliminate wrong answers

Option A is wrong because installing a Type 2 hypervisor on each physical server does not consolidate servers; it still requires five physical hosts, failing to reduce power and cooling costs. Option C is wrong because migrating all applications to a single OS using compatibility layers is impractical and does not address different OS requirements; it also introduces compatibility risks and does not achieve hardware consolidation. Option D is wrong because containerization shares the host OS kernel and cannot run different operating systems (e.g., Windows and Linux) on the same host without virtualization; it is not suitable for consolidating servers with different OSes.

Full explanation →

863

MCQmedium

A technician is troubleshooting a Samsung Galaxy tablet that has a cracked screen but still responds to touch. The user wants to transfer data to a new tablet. The technician connects the tablet to a PC via USB, but the PC does not recognize the device. What is the most likely reason?

A.The USB cable is defective

B.The tablet is in USB charging-only mode and cannot be changed due to the cracked screen

C.The tablet's USB port is damaged from the drop

D.The PC lacks the proper Samsung USB drivers

AnswerB

Android devices, including Samsung Galaxy tablets, typically default to 'Charging only' when connected to a computer via USB for security and simplicity. To enable data transfer modes like Media Transfer Protocol (MTP), the user must interact with a prompt on the tablet's screen to select the desired connection type. A severely cracked screen would render this crucial touch interaction impossible, effectively trapping the device in charging-only mode and preventing file access.

Why this answer

When a device's screen is cracked, the digitizer may still work, but the user might not be able to change USB settings from 'Charging only' to 'File transfer' if the touch input is needed for that selection. This is a common scenario where the default USB mode prevents data access.

Full explanation →

864

MCQhard

A technician is upgrading a workstation from a 500 GB HDD to a 1 TB SSD. After installing the SSD, the system boots into the old OS from the HDD instead of the new SSD. The boot order in UEFI shows only the HDD. What is the most likely reason?

A.The SSD is not connected to the fastest SATA port

B.The SSD is not partitioned with GPT or lacks an EFI system partition

C.The HDD has a higher priority in the boot order

D.The SSD needs a firmware update

AnswerB

For a UEFI system to recognize an SSD as a bootable device, the drive must be partitioned using the GUID Partition Table (GPT) scheme and contain an EFI System Partition (ESP). The ESP holds the necessary boot loaders and applications for the UEFI firmware. Without this specific GPT/ESP structure, the UEFI firmware cannot identify the SSD as a valid bootable volume, preventing it from appearing in the boot menu.

Why this answer

For a UEFI system to boot from a new SSD, the drive must be initialized with a GPT partition scheme and contain an EFI System Partition (ESP) holding the bootloader. A blank or MBR-partitioned SSD will not appear as a bootable UEFI device, so the firmware falls back to the still-connected HDD. The boot order showing only the HDD confirms the SSD lacks a recognized EFI boot entry.

Exam trap

220-1201 often tests the confusion between drive detection and bootability, leading candidates to blame boot order or port speed instead of the missing GPT/EFI System Partition.

How to eliminate wrong answers

Option A is wrong because SATA port speed affects performance, not whether the drive appears as a bootable UEFI device. Option C is wrong because the HDD already has higher priority only because the SSD is not listed at all; the root cause is the missing EFI boot entry, not ordering. Option D is wrong because a firmware update would not create a GPT/ESP structure on a blank drive, and the SSD is functioning enough to be detected.

Full explanation →

865

MCQmedium

A client reports that their new IoT smart bulb can be controlled from a smartphone app only when the phone is within 10 meters of the bulb. The bulb does not connect to the home Wi-Fi. Which network type is the smart bulb using?

A.Wireless local area network (WLAN)

B.Metropolitan area network (MAN)

C.Personal area network (PAN)

D.Wide area network (WAN)

AnswerC

A Personal Area Network (PAN) is a short-range wireless network designed to connect personal devices within an individual's immediate workspace, typically within a 10-meter radius. Technologies like Bluetooth, Near Field Communication (NFC), or infrared are commonly used for PANs, enabling direct device-to-device communication without requiring a larger network infrastructure. The described 10-meter control limitation and the absence of Wi-Fi perfectly align with the characteristics of a PAN, making it the correct network type for the smart bulb.

Why this answer

The smart bulb uses a personal area network (PAN) because it communicates directly with the smartphone over a short-range wireless technology, such as Bluetooth or Zigbee, without connecting to a home Wi-Fi router. The 10-meter range limitation is a key characteristic of PAN technologies, which are designed for device-to-device communication within a few meters to about 10 meters. This contrasts with WLAN, which would require Wi-Fi and a router for broader coverage.

Exam trap

The trap here is that candidates often confuse PAN with WLAN because both are wireless and can use the 2.4 GHz band, but the absence of a Wi-Fi router and the specific 10-meter range clearly indicate a PAN technology like Bluetooth, not a WLAN.

How to eliminate wrong answers

Option A is wrong because a wireless local area network (WLAN) requires a Wi-Fi access point or router to connect devices over a larger area (typically 30-100 meters indoors), and the bulb does not connect to home Wi-Fi. Option B is wrong because a metropolitan area network (MAN) spans a city or large campus (kilometers), far exceeding the 10-meter range, and is used for interconnecting multiple LANs, not personal devices. Option D is wrong because a wide area network (WAN) covers vast geographic areas (e.g., the internet) and relies on long-haul technologies like leased lines or cellular, which are irrelevant to a short-range, direct-connection IoT device.

Full explanation →

866

MCQmedium

A user reports that their smartphone's wireless charging pad stops charging after a few minutes. The phone charges fine with a cable. The charging pad works with another phone. What is the most likely cause?

A.The charging pad is defective.

B.The phone's battery is faulty.

C.The phone case is too thick or contains metal.

D.The phone's wireless charging coil is damaged.

AnswerC

Wireless charging relies on efficient electromagnetic induction between the pad's transmitting coil and the phone's receiving coil. A phone case that is excessively thick increases the physical distance between these coils, significantly reducing charging efficiency and generating more heat. Furthermore, cases containing metallic elements can absorb the electromagnetic field, causing both the phone and the pad to overheat and trigger safety protocols that prematurely stop the charging process to prevent damage.

Why this answer

Wireless charging relies on inductive coupling between the phone's receiver coil and the pad's transmitter coil. A thick case (especially one containing metal) can physically separate the coils beyond the effective range or cause eddy current losses that trigger thermal protection, causing the pad to shut down after a few minutes. The fact that the pad works with another phone and the phone charges via cable isolates the issue to the case, not the phone's battery or charging coil.

Exam trap

CompTIA often tests the distinction between 'doesn't work at all' vs. 'works then stops' to trap candidates into blaming the charging coil or pad, when the real issue is thermal or FOD-related interference from the case.

How to eliminate wrong answers

Option A is wrong because the charging pad works with another phone, proving it is not defective. Option B is wrong because a faulty battery would also cause issues with cable charging, but the phone charges fine with a cable. Option D is wrong because if the phone's wireless charging coil were damaged, the phone would not charge wirelessly at all, not just stop after a few minutes.

Full explanation →

867

MCQmedium

A customer calls to say their new smart TV can see the 2.4 GHz network but not the 5 GHz network, even though the router is dual-band. The technician checks the router settings and confirms both bands are enabled and broadcasting. What is the most likely reason the TV cannot see the 5 GHz network?

A.The 5 GHz SSID is hidden

B.The TV’s wireless adapter does not support 5 GHz

C.The 5 GHz channel is set to a DFS channel

D.The router’s 5 GHz radio is faulty

AnswerB

A TV's wireless adapter is engineered to operate within specific frequency bands, either 2.4 GHz, 5 GHz, or both. If the smart TV is equipped solely with a 2.4 GHz wireless radio, it fundamentally lacks the necessary hardware components, such as the appropriate antenna and chipset, to tune into and process signals transmitted on the 5 GHz frequency band. Consequently, it would be physically incapable of detecting or connecting to any 5 GHz network, regardless of the router's configuration, perfectly explaining why it would not appear in the TV's network list.

Why this answer

The most common reason a device sees only the 2.4 GHz band is that its wireless adapter lacks 5 GHz support. Many older or budget smart TVs ship with single-band 2.4 GHz Wi-Fi chipsets, so even though the router broadcasts both bands, the TV’s hardware cannot detect or connect to the 5 GHz network.

Exam trap

The trap in this question is that candidates often overthink and look for advanced reasons like hidden SSIDs or DFS channels, when the most straightforward explanation is a hardware compatibility issue: the TV's wireless adapter simply does not support the 5 GHz band.

How to eliminate wrong answers

Option A is wrong because a hidden SSID still broadcasts beacon frames (with the SSID set to null), so the TV would still see the network as a hidden or unnamed network; the issue is that the TV cannot see the 5 GHz network at all, not that it sees it without a name. Option C is wrong because DFS channels can cause a temporary delay in detecting the 5 GHz network (due to radar avoidance), but the TV would eventually see the network after channel availability check; the TV not seeing the 5 GHz network at all points to a hardware incompatibility, not a DFS issue. Option D is wrong because if the router’s 5 GHz radio were faulty, no device would see the 5 GHz network, but the technician confirmed both bands are enabled and broadcasting; the problem is isolated to the TV, not the router.

Full explanation →

868

MCQmedium

A technician is troubleshooting a laptop that will not charge. The battery is removable, and the power adapter works on another laptop. When the battery is inserted, the laptop powers on but shows '0% available (plugged in, not charging)'. What is the most likely cause?

A.The battery is defective and needs replacement.

B.The charging port is loose.

C.The power management driver is outdated.

D.The CMOS battery is dead.

AnswerA

A laptop battery that is detected by the system but consistently fails to accept a charge, despite the charger being connected and functional, is a strong indicator of internal cell degradation or a faulty battery management circuit. Over time, lithium-ion batteries lose their capacity and ability to hold a charge, eventually failing to initiate the charging process altogether. Replacing the defective battery with a new, compatible unit is the direct solution to restore the laptop's portable power functionality.

Why this answer

The 'plugged in, not charging' message often indicates a failed battery that cannot accept a charge, even though the system detects it. A defective battery cell will prevent charging. The power adapter and charging circuit are likely fine since the laptop powers on.

Full explanation →

869

MCQeasy

A technician is upgrading a server CPU and needs to select a processor that supports ECC memory. Which CPU feature is required for ECC support?

A.Integrated GPU

B.Hyper-Threading

C.Memory controller

D.Overclocking capability

AnswerC

The memory controller is a critical component, often integrated directly into the CPU, responsible for managing all data transfers between the CPU and the system's RAM modules. For Error-Correcting Code (ECC) memory to function, the memory controller must specifically contain the necessary logic to generate, store, and verify the additional parity bits used for error detection and correction. Without a memory controller designed to support ECC, the system cannot utilize the error-correcting capabilities of ECC RAM, making this a mandatory feature for server-grade CPUs.

Why this answer

ECC (Error-Correcting Code) memory support depends on the CPU's integrated memory controller, which manages the memory bus and performs the error detection and correction. Without a memory controller that supports ECC, the CPU cannot generate or check the ECC parity bits, regardless of other features. Integrated GPU, Hyper-Threading, and overclocking are unrelated to ECC functionality.

Exam trap

The trap is confusing ECC with other CPU features like Hyper-Threading or integrated graphics, or assuming any CPU can support ECC if the motherboard does; the exam tests that the memory controller is the key enabler.

How to eliminate wrong answers

Option A is wrong because an integrated GPU handles graphics rendering and has no role in memory error correction. Option B is wrong because Hyper-Threading is a simultaneous multithreading technology that improves parallel execution, not memory integrity. Option D is wrong because overclocking capability affects clock speeds and voltage, not ECC support.

Full explanation →

870

MCQmedium

A technician is troubleshooting a network where a user cannot access a web server at 10.0.0.50. The user's workstation has an IP of 10.0.0.25 with a subnet mask of 255.255.255.0. The technician pings 10.0.0.50 and gets a reply, but the web page does not load. What should the technician check next?

A.Verify the default gateway on the workstation.

B.Check if the web server's firewall is blocking HTTP/HTTPS traffic.

C.Change the workstation's IP address to a different subnet.

D.Replace the network cable between the workstation and switch.

AnswerB

Checking the web server's firewall is the correct troubleshooting step because firewalls are designed to selectively permit or deny traffic based on specific port numbers and protocols. It is a common configuration for a server's firewall to allow ICMP (ping) for basic reachability while simultaneously blocking or restricting access to application-layer ports like TCP 80 (HTTP) and TCP 443 (HTTPS), thus preventing web browsing despite successful ping.

Why this answer

The ping reply confirms Layer 3 connectivity between the workstation and the web server, so the issue is not with IP routing or the default gateway. Since the web page does not load despite successful ICMP echo replies, the problem is likely at Layer 4 or above, such as the web server's firewall blocking HTTP (port 80) or HTTPS (port 443) traffic. The technician should check the server's firewall rules to ensure these ports are open.

Exam trap

The A+ exam often tests the distinction between Layer 3 connectivity (ping) and Layer 4+ application access, trapping candidates who assume a successful ping means the service is fully reachable.

How to eliminate wrong answers

Option A is wrong because the ping reply proves that the workstation can reach the web server without needing a default gateway (they are on the same subnet, so traffic is sent directly via ARP). Option C is wrong because changing the workstation's IP to a different subnet would break connectivity, as the server is at 10.0.0.50/24 and the workstation would no longer be on the same network. Option D is wrong because a faulty cable would cause Layer 1 or Layer 2 issues, preventing the ping from succeeding; since the ping works, the cable is functional.

Full explanation →

871

MCQeasy

A technician is asked to set up a network for a new branch office that will connect back to the main headquarters using a leased line. The branch has 50 employees who need access to centralized databases and email. Which network type best describes the branch office's internal network?

A.Wide area network (WAN)

B.Metropolitan area network (MAN)

C.Local area network (LAN)

D.Personal area network (PAN)

AnswerC

A Local Area Network (LAN) is specifically designed to connect devices, such as computers, printers, and servers, within a confined geographical area like a single office building, home, or campus. It provides high-speed data transfer and resource sharing among connected devices, making it the ideal choice for establishing the internal network infrastructure for a 50-employee office. This setup allows for efficient local communication and access to shared resources.

Why this answer

The branch office's internal network connects 50 employees within a single physical location, providing shared access to local resources like printers and servers. This fits the definition of a Local Area Network (LAN), which operates over a limited geographic area and uses high-speed technologies such as Ethernet (IEEE 802.3) and Wi-Fi (IEEE 802.11). The leased line to headquarters is a separate WAN connection, but the internal network itself remains a LAN.

Exam trap

The trap here is that candidates see 'leased line' and 'connect back to main headquarters' and immediately assume the entire setup is a WAN, failing to recognize that the question specifically asks about the branch office's internal network, which is a LAN.

How to eliminate wrong answers

Option A is wrong because a Wide Area Network (WAN) spans large geographic distances (e.g., between cities or countries) and is used for the leased line connecting the branch to headquarters, not for the internal office network. Option B is wrong because a Metropolitan Area Network (MAN) covers a city or metropolitan region, typically larger than a single office but smaller than a WAN, and is not appropriate for a single branch office. Option D is wrong because a Personal Area Network (PAN) is limited to a very short range (e.g., Bluetooth within 10 meters) and supports only a few personal devices, not 50 employees.

Full explanation →

CompTIA A+ Core 1 220-1201 (220-1201) — Questions 826–871