220-1101 Hardware and Network Troubleshooting Practice Test 8 — 15 Questions

Question 1

A technician is troubleshooting a workstation that experiences slow file transfers and occasional timeouts on the local network. The workstation is connected to a managed switch via a Cat5e cable. The technician checks the switch port configuration and finds it is set to 'auto-negotiate'. The workstation's network adapter properties show it is manually configured to '100 Mbps Full Duplex'. Other workstations on the same switch do not experience these issues. Which of the following is the MOST likely cause of the problem?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

The switch port is negotiating to half-duplex because the workstation is manually set to full duplex.. The workstation's NIC is manually set to 100 Mbps Full Duplex, while the switch port is set to auto-negotiate. During auto-negotiation, if one side is manually configured, the other side will detect the speed via link pulses but cannot determine the duplex setting, defaulting to half-duplex. This duplex mismatch causes collisions, leading to slow file transfers and timeouts, while other workstations using auto-negotiation on both sides operate correctly.

Answer

The Cat5e cable is damaged or too long.

Answer

The switch port is faulty and needs to be replaced.

Answer

The workstation's NIC driver is outdated or corrupt.

Question 2

A technician installs a new CPU on a compatible motherboard. After applying thermal paste and installing the cooler, the system powers on but immediately shuts down after about 3 seconds. The technician verifies that the CPU fan is spinning and that the power supply is adequate. The motherboard's diagnostic LEDs show no errors before shutdown. Which of the following is the MOST likely cause?

Accepted Answer

The CPU is not supported by the BIOS version. The system powers on but shuts down after a few seconds, which is a classic symptom of a CPU that is not supported by the installed BIOS version. Even though the motherboard's diagnostic LEDs show no errors before shutdown, the CPU may lack the required microcode, causing the motherboard to fail to initialize the CPU properly and triggering a safety shutdown. The fact that the CPU fan spins and the power supply is adequate rules out basic power or cooling issues, pointing directly to a BIOS compatibility problem.

Answer

The thermal paste was applied too liberally

Answer

The CPU fan connector is plugged into the wrong header

Answer

The power supply's ATX12V connector is loose

Question 3

A technician is troubleshooting a desktop workstation that can successfully ping other local devices and the default gateway by IP address, but cannot access any websites when browsing with a web browser. The workstation obtains its IP configuration automatically via DHCP. The technician confirms that the DHCP server is providing a valid DNS server address and that other workstations on the same network can browse the internet normally. Which of the following is the MOST likely cause of the issue?

Accepted Answer

The workstation is configured to use a proxy server that is not available. The workstation can ping local devices and the default gateway by IP address, confirming that Layer 2/3 connectivity (ARP, IP routing) is functional. However, it cannot browse websites, which requires DNS resolution (UDP/TCP port 53) and HTTP/HTTPS traffic (TCP ports 80/443). Since other workstations on the same network browse normally, the issue is isolated to this workstation. A misconfigured proxy server (e.g., set in browser or system proxy settings) can intercept or block web traffic, preventing access to websites even when DNS and IP connectivity are working.

Answer

Duplicate IP address on the network

Answer

Incorrect subnet mask configured by DHCP

Answer

The workstation's DNS client cache is corrupted

Question 4

A workstation is unable to connect to the internet. The technician runs the 'ipconfig' command and sees the IPv4 address is 169.254.15.200 with a subnet mask of 255.255.0.0. The workstation can ping other devices on the local subnet but cannot ping the default gateway or any external addresses. Which TWO actions should the technician take to resolve this issue? (Select two.)

Accepted Answer

Run 'ipconfig /release' followed by 'ipconfig /renew'. The IP address 169.254.15.200 with a 255.255.0.0 subnet mask is an Automatic Private IP Addressing (APIPA) address, which Windows assigns when a DHCP server is unreachable. Since the workstation can communicate with local subnet devices but not the default gateway, the DHCP server is either down or not responding. Running 'ipconfig /release' followed by 'ipconfig /renew' forces the workstation to release the APIPA address and attempt to obtain a valid DHCP lease, which will resolve the issue if the DHCP server becomes available.

Answer

Disable the Windows Firewall

Answer

Replace the network interface card (NIC)

Question 5

A user reports that their desktop computer will not boot after a power surge. When the power button is pressed, the case power LED lights up, fans spin for about two seconds, and then everything stops. There are no beep codes and no display. The technician has tested the power supply with a multimeter and confirmed that all voltages are within specification. The motherboard shows no signs of physical damage or bulging capacitors. Which component should the technician test or replace NEXT?

Accepted Answer

Motherboard. Since the power supply voltages are confirmed good and the motherboard shows no visible damage, the next most likely culprit is the motherboard itself. The symptom of fans spinning briefly and then stopping without beep codes or display indicates a failure in the motherboard's power sequencing or POST logic, often due to a damaged voltage regulator module (VRM) or chipset from the power surge, even without visible bulging capacitors.

Answer

CPU

Answer

RAM

Answer

Graphics card

Question 6

A technician is troubleshooting a desktop computer that powers on but displays nothing on the screen. The technician hears two short beeps from the motherboard speaker and then silence. The CPU fan spins, and the power LED is on. Based on the beep code (two short beeps) typical of AMI/BIOS, which component is most likely faulty?

Accepted Answer

Memory (RAM). Two short beeps from an AMI BIOS typically indicate a memory (RAM) error. The system powers on (CPU fan spins, power LED on) but fails POST due to faulty or improperly seated RAM, halting before video initialization. This makes RAM the most likely faulty component.

Answer

Power supply

Answer

Graphics card

Answer

CPU

Question 7

A technician is troubleshooting a workstation that experiences slow file transfers and occasional timeouts on the local network. The workstation is connected to a managed switch via a Cat5e cable. The technician checks the switch port configuration and finds it is set to 'auto-negotiate'. The workstation's network adapter properties show it is manually configured to '100 Mbps Full Duplex'. Other workstations on the same switch do not experience these issues. Which of the following is the MOST likely cause of the problem?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Insufficient power supply wattage. The intermittent loss of network connectivity specifically during CPU-intensive tasks like video rendering points to a power supply issue. The 400W power supply is likely insufficient to handle the combined load of the high-end graphics card and the rest of the system, causing voltage drops that starve the NIC of power, making its link light turn off. Replacing the cable and switch port with no effect, while the same port works with a laptop, isolates the problem to the workstation's internal power delivery.

Answer

Faulty network card

Answer

Outdated network driver

Answer

Electromagnetic interference from the GPU

Question 8

A user reports that their desktop computer intermittently loses network connectivity, especially when the nearby office printer starts printing. The link light on the NIC occasionally turns off during these events. The Ethernet cable runs near a fluorescent light fixture and a power cable. The technician has already replaced the Ethernet cable with a known-good Cat6 shielded cable, but the issue persists. Which of the following should the technician do NEXT?

Accepted Answer

Ensure the Ethernet cable is not routed near sources of electromagnetic interference (EMI).. The issue persists even after replacing the cable with a known-good Cat6 shielded cable, indicating that the problem is not the cable itself but the environment. The Ethernet cable runs near a fluorescent light fixture and a power cable, both of which are common sources of electromagnetic interference (EMI). Since the link light turns off when the printer starts, the EMI from the printer or nearby sources is likely inducing noise on the cable, disrupting the signal. The next logical step is to reroute the cable away from these EMI sources, as shielding alone may not be sufficient if the interference is strong or the shield is not properly grounded.

Answer

Move the computer to a different electrical outlet.

Answer

Replace the network interface card (NIC).

Answer

Update the NIC driver from the manufacturer's website.

Question 9

A technician installed a used SATA SSD from another computer into a desktop workstation. The BIOS correctly detects the SSD, but Windows does not show any new drive in File Explorer. The technician opens Disk Management and sees no uninitialized disks listed. Which of the following should the technician check NEXT?

Accepted Answer

Change the SATA controller mode in BIOS from RAID to AHCI. When a SATA SSD is detected in BIOS but not in Windows Disk Management, and no uninitialized disks appear, the most likely cause is that the SATA controller mode is set to RAID or Intel RST (Rapid Storage Technology) in BIOS, which prevents Windows from recognizing the drive as a standard AHCI device. Changing the mode to AHCI allows the OS to properly enumerate and initialize the SSD, as AHCI is the native driver interface for SATA devices in Windows.

Answer

Check the SATA cable power connection and ensure the drive is receiving power

Answer

Run the format command from a command prompt with administrative privileges

Answer

Update the chipset drivers from the motherboard manufacturer's website

Question 10

A user reports that their desktop computer shuts down unexpectedly while running video editing software, usually after about 15 minutes of heavy rendering. The technician has observed that the CPU fan and case fans spin at high speed just before the shutdown. The technician cleaned all dust from the heatsink and case intakes, but the problem persists. The BIOS reports CPU idle temperature at 35°C (95°F). Which of the following should the technician do NEXT?

Accepted Answer

Replace the thermal paste between the CPU and heatsink. The CPU idle temperature of 35°C is normal, but the shutdown after 15 minutes of heavy rendering with high fan speeds indicates the CPU is overheating under load. Since cleaning the dust did not resolve the issue, the most likely cause is degraded thermal paste between the CPU and heatsink, which loses its ability to transfer heat efficiently over time. Replacing the thermal paste restores proper thermal conductivity, allowing the heatsink to dissipate heat effectively and prevent thermal throttling or shutdown.

Answer

Replace the CPU cooler with a larger model

Answer

Update the motherboard BIOS to the latest version

Answer

Test the power supply voltage rails under load with a multimeter

Question 11

A user reports that their desktop computer intermittently loses network connectivity when the overhead fluorescent lights in the office are turned on. The link light on the network interface card (NIC) turns off during these events. The technician replaced the existing unshielded twisted pair (UTP) Cat5e cable with a shielded Cat6 cable, but the problem continues. Which of the following should the technician do NEXT to resolve the issue?

Accepted Answer

Move the Ethernet cable away from the fluorescent light fixtures. The problem is electromagnetic interference (EMI) from the fluorescent lights, which generates a strong magnetic field that induces noise in the Ethernet cable. Even with shielded Cat6 cable, the interference can still couple into the signal if the cable is routed too close to the light fixtures, especially if the shielding is not properly grounded. Moving the cable away from the fixtures physically separates the cable from the EMI source, which is the most direct and effective next step.

Answer

Replace the network switch

Answer

Replace the network interface card (NIC)

Answer

Check the grounding of the electrical system in the building

Question 12

A technician is troubleshooting a workstation that experiences slow file transfers and occasional timeouts on the local network. The workstation is connected to a managed switch via a Cat5e cable. The technician checks the switch port configuration and finds it is set to 'auto-negotiate'. The workstation's network adapter properties show it is manually configured to '100 Mbps Full Duplex'. Other workstations on the same switch do not experience these issues. Which of the following is the MOST likely cause of the problem?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Check the power supply unit (PSU) output voltage during a printer startup. The sporadic network outage coinciding with the heavy-duty laser printer starting a print job, combined with the link light turning off, strongly indicates a power quality issue. The printer and workstation are on different electrical circuits, but a large inductive load like a laser printer's fuser can cause electrical noise or a voltage sag on the shared mains supply, which can disrupt the workstation's power supply unit (PSU) output. If the PSU cannot maintain stable voltages (e.g., +3.3V, +5V, +12V) during the sag, the NIC may lose power or become unstable, causing the link light to drop. Checking the PSU output voltage during printer startup is the logical next step to confirm or rule out this power-related cause.

Answer

Replace the network interface card (NIC)

Answer

Increase the DHCP lease time on the router

Answer

Disable power management on the network adapter

Question 13

A user reports that their desktop computer shuts down unexpectedly when running resource-intensive applications like video editing. The technician has cleaned the dust from the heatsink and fans, verified that all fans are spinning, and monitored temperatures. The BIOS reports CPU temperature as 35°C idle and 70°C under load, which are within normal specifications. The system has a dedicated graphics card that requires a 6-pin PCIe power connector, and the power supply is a 450W unit that came with the computer case. Which of the following is the MOST likely cause?

Accepted Answer

The power supply is inadequate for the system's peak power draw. The system shuts down under load despite normal CPU temperatures and clean cooling. A 450W power supply that came with a case is typically a low-quality unit with limited capacity. The dedicated graphics card, especially during video editing, can draw significant power, and the total system peak draw likely exceeds the PSU's capacity, causing it to trip overcurrent protection or shut down.

Answer

The CPU thermal paste has degraded and needs to be reapplied

Answer

The motherboard has a faulty capacitor

Answer

The RAM is incompatible with the motherboard

Question 14

A technician is troubleshooting a desktop computer in a manufacturing facility. The computer loses network connectivity whenever a nearby floor buffer (motor) is turned on. The link light on the NIC turns off during these events. The technician has already replaced the Ethernet cable with a shielded Cat6 cable and moved the computer to a different electrical circuit. The problem persists. Which of the following should the technician do NEXT?

Accepted Answer

Install a ferrite choke on the network cable.. The floor buffer's motor generates strong electromagnetic interference (EMI) that couples onto the unshielded network cable, corrupting the signal and causing the NIC's link light to turn off. Installing a ferrite choke on the cable suppresses common-mode EMI by acting as a low-pass filter, blocking high-frequency noise while allowing the data signal to pass. Since the technician already replaced the cable with shielded Cat6 and isolated the electrical circuit, the next logical step is to add a ferrite choke to attenuate the remaining conducted interference.

Answer

Replace the network interface card (NIC).

Answer

Change the switch port configuration from auto-negotiation to 100 Mbps full duplex.

Answer

Disable the NIC's power management settings in the operating system.

Question 15

A technician is troubleshooting a workstation that experiences slow file transfers and occasional timeouts on the local network. The workstation is connected to a managed switch via a Cat5e cable. The technician checks the switch port configuration and finds it is set to 'auto-negotiate'. The workstation's network adapter properties show it is manually configured to '100 Mbps Full Duplex'. Other workstations on the same switch do not experience these issues. Which of the following is the MOST likely cause of the problem?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Duplex mismatch. The loopback test passed, ruling out a faulty NIC. The known-good Cat6 cable eliminates a bad cable. The switch port is hard-coded to 100 Mbps full duplex while the workstation NIC is set to auto-negotiate. This creates a duplex mismatch: auto-negotiation on the NIC fails to detect the fixed setting on the switch, causing the NIC to fall back to half-duplex while the switch remains full-duplex, leading to intermittent connectivity and irregular link light behavior.

Answer

Faulty NIC

Answer

Bad cable

Answer

Incorrect VLAN assignment