CompTIA A+ Core 1 220-1201 (220-1201) — Questions 451–525

POST beep codes are used to indicate hardware errors. A series of long beeps typically points to a memory issue, not a CPU problem. The technician should reseat the RAM modules to resolve this.

Virtual machines benefit from many cores and threads because each VM can be assigned to a separate core. AMD AM5 CPUs offer high core counts, making them ideal for virtualization. This tests understanding of how CPU architecture affects specific tasks.

This is a common deployment issue where the device's wireless radio supports 2.4 GHz but not 5 GHz, or the 5 GHz channel is not supported. Older or budget tablets may lack 5 GHz capability, or the corporate network may use a 5 GHz channel (e.g., DFS channels) that the tablet's radio cannot use. Checking the tablet's Wi-Fi specifications is the correct first step.

This question tests basic printer configuration knowledge. Most multifunction printers have a control panel menu that displays network settings, including the IP address. Alternatively, printing a configuration page from the printer's menu will show the IP.

The workstation has a valid IP and can ping itself, indicating the NIC and stack are working. However, it cannot reach the gateway, which suggests a Layer 2 issue—likely an incorrect or missing default gateway configuration, or a VLAN mismatch on the switch port.

Since VGA is analog and HDMI is digital, an active converter is needed. A USB-C to VGA adapter can work if the laptop supports video over USB-C, but an HDMI to VGA adapter is also an option if the laptop has HDMI. The best answer is an HDMI to VGA active adapter, as it directly converts the digital signal to analog.

Horizontal white streaks on inkjet prints typically indicate clogged printhead nozzles. Since the cleaning cycle did not help, physically cleaning the printhead or replacing it is the next step. Replacing ink cartridges or adjusting paper settings would not address clogged nozzles.

Option C is correct because many streaming apps implement their own brightness control logic, often to optimize video playback or reduce power consumption. When the app's internal brightness setting is configured to dim, it overrides the system's auto-brightness for that specific app, causing the screen to dim only while the app is active. This is a common behavior in apps that manage their own display parameters independently of the iOS system settings.

The correct next step is to remove the screw and bracket, then gently lift the drive out of the SATA connector. This is because the metal bracket secures the drive in place, and the SATA connector is a fragile, keyed interface that requires a straight, gentle pull to avoid damaging the pins or the drive's edge connector. Forcing the drive or prying it can bend pins or crack the connector.

STP Cat6a cable includes a conductive shield that protects against electromagnetic interference (EMI) from nearby high-voltage machinery. The 60-meter run is well within Cat6a's 100-meter maximum segment length, making it the best choice for this environment.

If the system has integrated graphics and a discrete card, the UEFI may default to the integrated output. Changing the primary video adapter to PCIe/ PEG forces the system to use the new card. This tests understanding of video initialization order in UEFI.

HTTPS (Hypertext Transfer Protocol Secure) encrypts data between clients and a web server using TLS/SSL. The certificate you configured on the server is used to establish a trusted, encrypted session, ensuring confidentiality and integrity of transmitted data.

This question tests understanding of Ethernet pinout and fault isolation. The correct answer is that the cable is likely damaged or broken on the pairs used for 1000Base-T (all four pairs), but 100Base-TX only uses pairs 1-2 and 3-6. The symptom indicates a break in the cable affecting the secondary pairs.

Live migration (vMotion in VMware, live migration in Hyper-V) allows moving running VMs between hosts with zero downtime. This is a key feature for high availability and maintenance. The correct answer directly names this feature.

The most likely issue is that the DisplayPort cable is not certified for the required bandwidth. At 2560x1440 resolution, the monitor requires a high data rate (approximately 7.04 Gbps for 60 Hz), and a non-certified or low-quality cable may not reliably support this bandwidth, causing intermittent signal loss and black screens. Lower resolutions work because they require less bandwidth, allowing the cable to function within its limits.

Warping and poor adhesion in FDM printing are often caused by an incorrect first layer height or bed leveling. If the nozzle is too far from the bed, the filament does not squish enough to stick. Adjusting the bed leveling or Z-offset ensures proper first layer adhesion.

Since the switch port is up and other devices on the same switch obtain IP addresses correctly, the DHCP server and the general network path are functional. The most likely cause is a Layer 2 security feature, such as Port Security, which can be configured to block unknown or specific MAC addresses, preventing the computer from communicating with the DHCP server even though the physical link is active.

An uninterruptible power supply (UPS) provides battery backup and voltage regulation, protecting against surges, sags, and brownouts that can cause reboots or failures. A surge protector only guards against spikes, not low-voltage conditions. A UPS is the appropriate solution for unstable power.

Coffee can seep into the touchpad connector or the touchpad itself, causing a short or corrosion. The keyboard working suggests the liquid did not reach the main board, but the touchpad is a separate component that is more exposed. The correct answer is liquid damage to the touchpad.

Applying heat to the edges of the screen softens the adhesive that secures the display to the frame, which is a critical step before any prying action. On older smartphone models, the screen is typically bonded with a strong adhesive that can crack the glass further or damage the LCD if pried without softening. This step reduces the risk of breaking the digitizer or LCD during removal.

Garbled output from one OS but not another typically indicates a driver or PPD issue. macOS uses PostScript Printer Description (PPD) files for laser printers, and an incorrect or missing PPD can cause communication errors. Installing the correct driver for macOS resolves the problem.

The correct answer is B (DNS) because the users can connect to the VPN and ping internal IP addresses, but cannot resolve hostnames to IP addresses. This indicates that the DNS resolution is failing, which is caused by the VPN server not correctly pushing DNS server settings to the VPN clients. Without proper DNS configuration, clients cannot translate domain names (e.g., internal server names or internet URLs) into IP addresses, even though the network layer connectivity (ping to IPs) works.

Option B is correct because connecting the 24-port unmanaged switch to one of the router's LAN ports extends the network, allowing all 12 devices to connect via the switch. The router handles routing and DHCP, while the switch provides ample ports and wire-speed forwarding at Layer 2, ensuring optimal performance without collisions or bandwidth contention.

When a system has a dedicated GPU, the motherboard video ports are often disabled. The most common oversight is connecting the monitor to the wrong port. This scenario tests basic hardware installation knowledge.

Passive cooling relies on low heat output. TDP (Thermal Design Power) directly indicates the amount of heat a cooler must dissipate. A low TDP CPU is essential for fanless operation.

A multimeter is the correct tool because it can measure DC voltage directly on the Ethernet cable's power-carrying pairs (typically pins 4,5 and 7,8 for Mode A or pins 1,2 and 3,6 for Mode B in 802.3af/at PoE). By probing the switch-side pins while the phone is connected, you can verify whether the switch is actually delivering the expected 48V DC, isolating a cable or power issue. This is the only tool among the options that can confirm the presence of voltage.

The issue is location-specific: the connection drops only in the conference room, while other areas are stable. This strongly points to a local environmental factor, such as thick walls (e.g., concrete or metal) that attenuate the 2.4 GHz or 5 GHz signal, or electronic interference from devices like projectors, fluorescent lights, or microwave ovens. A faulty adapter or overloaded AP would cause problems everywhere, not just in one room.

Option B is correct because VLANs logically segment traffic between departments on a single switch, and configuring a trunk port to the router with subinterfaces (using VLAN tagging) allows inter-VLAN routing for internet access while maintaining isolation between the accounting and HR VLANs. This approach meets the requirement of preventing unauthorized access between departments while enabling shared internet connectivity through the router.

RAID 5 can tolerate one drive failure without data loss because parity data is distributed across all drives. The array will continue to operate in a degraded state until the failed drive is replaced and rebuilt. A second failure would cause data loss.

For high-quality photo prints on glossy paper, the driver must be set to 'photo' or 'best' quality and the paper type to 'glossy' or 'photo paper'. This optimizes ink droplet size and drying time. The default 'normal' and 'plain paper' settings use less ink and different halftoning, causing washed-out, grainy results.

Labeling both ends of each cable with a unique identifier is a best practice for cable management that directly reduces troubleshooting time. When a cable fault occurs or a move/add/change is needed, technicians can quickly trace the cable from the patch panel to the workstation jack without tone-and-probe testing, minimizing downtime. This practice aligns with TIA/EIA-606-A labeling standards for administration of telecommunications infrastructure.

Option B is correct because Thunderbolt 3 over USB-C supports DisplayPort daisy-chaining (Multi-Stream Transport, MST). A USB-C to DisplayPort cable from the laptop to the first monitor carries the video signal, and a standard DisplayPort cable from the first monitor's DisplayPort out to the second monitor's DisplayPort in completes the chain. This configuration leverages the MST capability inherent in Thunderbolt 3 and DisplayPort 1.2 or later, allowing two 4K monitors to be driven from a single port.

A static IP address that is not in the same subnet as the router prevents the laptop from communicating with the default gateway. Even though the Wi-Fi association succeeds (hence 'Secured'), the laptop cannot route traffic to the internet because it cannot reach the router's IP address. This mismatch causes the 'No Internet' message while the link-layer connection remains intact.

High CPU usage by the 'System' process often indicates a driver or hardware issue, such as a failing battery or a misconfigured power plan. In tablets, a common cause is a driver that prevents the device from entering low-power sleep states, leading to constant CPU activity and battery drain.

A power outage can cause multiple drives to be marked as offline or failed due to incomplete writes, even if they are healthy. The array status 'Failed' with all drives detected suggests a metadata issue. The best first step is to check the controller's event log and attempt to import or rebuild the array without initializing it, which would destroy data.

C is correct because Network Address Translation (NAT) translates the private IP address of the internal web server to a public IP address, allowing internal users to reach it over the internet. Without NAT, the router would drop packets with private source addresses destined for the internet, as private IPs are not routable on the public internet per RFC 1918.

Bluetooth interference from other devices or physical obstructions (like a rugged case) can cause signal degradation, leading to missed keystrokes. The scanner may use a different Bluetooth profile or be less sensitive to interference. The correct answer identifies interference as the likely cause.

The backlight LED or inverter is the most likely failing component because the display is dim but still functional (the LCD panel itself works, as the OS loads and touch responds). A failing backlight reduces brightness and can cause flickering due to inconsistent power delivery to the LEDs, while the digitizer and GPU remain operational.

The most likely issue is a damaged or poorly terminated Cat5e cable. A 100-meter Cat5e cable is within the maximum length specification for 1 Gbps (100 meters), so the length alone is not the problem. However, a damaged cable or bad termination can cause excessive packet loss, CRC errors, or auto-negotiation failures, resulting in slower throughput even though the link appears to be up.

Option C is correct because the 'Keep Wi-Fi on during sleep' setting, when configured to 'Always', ensures the Wi-Fi radio remains active even when the screen is off. This is essential for a point-of-sale (POS) tablet that must maintain a constant network connection for transaction processing, regardless of the device's sleep state.

Quad-channel memory architecture requires that all four memory channels be populated with identical modules to achieve maximum bandwidth. Installing one module per channel (e.g., in slots 1, 3, 5, 7 or the designated quad-channel slots) allows the memory controller to access all four channels simultaneously, quadrupling the data transfer rate compared to single-channel. Using fewer modules or mismatched sizes would reduce the channel count or cause the system to run in a lower-channel mode.

The battery management system (BMS) is the circuit board inside the battery pack that controls charging, monitors cell voltage and temperature, and communicates with the laptop. Since the AC adapter outputs correct voltage and the laptop runs on AC power, the BMS is the most likely failed component because it can prevent charging even if the lithium-ion cells are healthy. A faulty BMS may stop communicating with the laptop's embedded controller, causing the system to treat the battery as absent or non-functional.

RAID 10 (1+0) mirrors and then stripes, so usable capacity is half of total raw capacity (4 x 500 GB = 2 TB raw, 1 TB usable). The technician likely expected RAID 5 capacity (75% usable) but configured RAID 10.

The external display working normally indicates the GPU and OS are functional. The black built-in display points to a failure in the LCD panel, backlight, or the display cable (e.g., LVDS/eDP ribbon cable) connecting the motherboard to the screen. A loose or damaged internal cable is a common cause, especially in laptops that have been moved frequently.

An APIPA address (169.254.x.x) indicates the PC failed to get a DHCP lease. Since the router has DHCP enabled, the issue is likely a bad Ethernet cable or a port problem preventing communication with the DHCP server.

This question tests understanding of VoIP passthrough ports. The PC's lack of connectivity is often due to a faulty or unseated Ethernet cable between the phone and PC. The phone itself is working, so the upstream connection is fine.

RAID 0 stripes data across drives with no parity. If the array metadata is corrupted or one drive fails, the entire array becomes inaccessible. Individual detection suggests the drives are physically okay, but the RAID configuration is lost.

For dual-channel operation, memory modules must be installed in the correct slots, typically alternating colors or labeled as A2 and B2 (or slots 2 and 4) on most modern motherboards. This ensures the memory controller can access both sticks simultaneously, increasing bandwidth. The user manual or motherboard labeling is the definitive guide, but the common practice is to use the second and fourth slots from the CPU.

When a device can connect via Ethernet but not Wi-Fi, the issue is usually with the wireless configuration or hardware, not the network itself. Incorrect wireless security settings, such as a mismatched encryption type or password, are a common cause of connection failure after the network is detected.

The ipconfig /all command displays the full TCP/IP configuration, including the DNS server addresses assigned to the laptop's network adapter. Since the user can reach websites by IP address but not by domain name, the issue is likely with DNS resolution; ipconfig /all allows verification of whether the DNS server is correctly configured or pointing to an unreachable server.

Fax over VoIP is sensitive to jitter and latency. The ATA's settings for fax passthrough (T.38) must be enabled and properly configured. Without T.38, fax data may be corrupted by voice codecs.

A peer-to-peer network (B) is the correct choice because it allows five computers to share files and a printer directly without a dedicated server. Each computer acts as both a client and a server, making it ideal for small offices with fewer than 10 devices where centralized management is unnecessary.

DDR3L modules operate at 1.35V, while standard DDR3 operates at 1.5V. Many older motherboards do not support DDR3L, or they require specific BIOS settings to handle the lower voltage. The technician should verify motherboard compatibility before installation.

If the GPU is not detected, the most likely motherboard-related cause is that the PCIe slot is disabled in BIOS or the slot itself is faulty. Another possibility is that the slot is configured for a different device (e.g., an M.2 drive sharing lanes). Verifying BIOS settings is the first step.

The most common reason a touchscreen fails to respond after a working display and OS load is a missing or incorrect driver. In Windows, the touchscreen driver appears under 'Human Interface Devices' in Device Manager; if it's not present or has a yellow exclamation mark, the OS cannot interpret touch input. Checking Device Manager is the quickest, non-invasive first step before considering hardware replacement.

The correct answer is C because VGA connectors have pins that can bend or become loose over time, causing intermittent signal loss. This tests knowledge that VGA is an analog connector susceptible to physical damage and signal degradation.

The branch router needs to obtain a public IP address automatically from the ISP, which requires it to act as a DHCP client on its WAN interface. At the same time, internal devices need private IP addresses, so the router must also act as a DHCP server on its LAN interface, leasing addresses from a private range. Option B correctly combines both roles: DHCP client on the WAN side and DHCP server on the LAN side.

The user can access network shares by IP address but not by hostname, which indicates a name resolution failure specific to NetBIOS. NetBIOS over TCP/IP (NBT) is responsible for resolving NetBIOS names (used for file and printer sharing on Windows networks) to IP addresses. Since DNS works for other domains but not for the file server's hostname, the issue is likely with NetBIOS name resolution, not DNS.

Overclocking increases the CPU's clock speed beyond stock settings, which generates more heat. A robust cooling solution is essential to maintain stability and prevent thermal throttling or damage. Other features like core count or cache are secondary for overclocking.

A 6+2 pin PCIe power cable can be used as either a 6-pin or 8-pin connector. The technician can use the 8-pin cable and the 6+2 pin cable (with the 2-pin attached) to provide two 8-pin connections.

The 'Replace Toner' error after installing a new cartridge often means the cartridge is not properly seated or the protective seal was not removed. Removing the seal allows toner to flow, and reseating ensures the printer detects the cartridge correctly.

RAID 1 mirrors data across two drives, so usable capacity equals the size of one drive (4 TB). This provides redundancy, not increased storage. RAID 0 would combine capacity, and RAID 5 requires at least three drives.

This question covers cloud deployment models. A hybrid cloud combines public cloud services (for email/collaboration) with private or on-premises infrastructure (for sensitive data). Public cloud alone would violate regulations, community cloud is for shared industry needs, and private cloud is entirely on-premises, missing the benefits of public cloud for non-sensitive workloads.

The most likely cause is that the device's operating system version is too old for the app. Android apps specify a minimum API level (minSdkVersion) in their manifest; if the device runs an older OS version below that threshold, Google Play Store will block the installation and display an incompatibility message. Since the user has plenty of storage and a strong connection, the OS version is the primary remaining constraint.

When a Bluetooth speaker is listed in the iPhone's settings but tapping it fails to connect, the most common cause is a corrupted pairing record. Selecting 'Forget This Device' removes the stored link key, forcing a fresh pairing handshake that re-establishes the correct encryption and service discovery. This is the first-line troubleshooting step because it directly addresses the stored connection state without affecting other network settings or requiring a device restart.

In the 2.4 GHz band, only channels 1, 6, and 11 are non-overlapping (each occupies 22 MHz with 5 MHz spacing). Since channel 6 is already experiencing heavy interference, moving to channel 1 or 11 avoids co-channel and adjacent-channel interference from other devices on or near channel 6, minimizing contention.

The proxy server is most likely using HTTP (Hypertext Transfer Protocol) to forward requests to external web servers. Since users are accessing internal resources but cannot reach external websites, the proxy server acts as an intermediary for web traffic. HTTP is the standard protocol for web communication, and proxy servers typically use HTTP (or HTTPS) to forward client requests to internet web servers, as it allows the proxy to cache, filter, and modify web traffic.

Horizontal white lines on inkjet output often indicate a paper feed issue, such as dirty or worn feed rollers. The roller's surface can lose traction, causing the paper to feed unevenly and creating gaps. Cleaning or replacing the feed rollers typically resolves the problem.

Local communication working while internet access fails points to a problem with the router or the connection between the switch and the router. The switch itself is functioning correctly for local traffic, so the issue is upstream.

Enabling the device's passcode and Touch ID/Face ID is essential because it activates hardware-backed encryption on iOS devices. Without a passcode, iOS cannot generate the encryption key required to protect data at rest, and remote wipe capabilities are contingent on the device being able to authenticate and enforce management commands. This step directly satisfies the corporate requirements for data encryption and remote wipeability.

The default gateway is the router's IP address that provides a path to networks outside the local subnet. Without a default gateway, the computer can still communicate with other devices on the same local network (like the printer and other computers) using ARP and direct MAC addressing, but it cannot reach any destination outside its own subnet, including the internet. The technician manually assigned IPs, so DHCP is not involved, and DNS resolution would still work for local names but would fail for external names only because the DNS query packets cannot leave the subnet without a gateway.

The IP address 169.254.3.12 falls within the Automatic Private IP Addressing (APIPA) range (169.254.0.0/16), which Windows assigns when a DHCP discovery broadcast fails to receive a response. Since other devices on the same wired network work fine, the issue is isolated to this laptop's inability to reach the DHCP server, most likely due to a local configuration problem or a faulty network interface.