220-1101 Practice Test 25 — 15 Questions

Question 1

A user reports that their desktop workstation loses network connectivity intermittently, often occurring when the user bumps the desk or moves the Ethernet cable. The link light on the NIC sometimes flickers and occasionally turns off for a few seconds during these events. The technician has already replaced the Ethernet cable with a known-good one and tested a different port on the same switch; the problem persists. Which of the following is the MOST likely cause of the issue?

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

Accepted Answer

The NIC port on the workstation has damaged or loose pins causing intermittent connection. The symptom of losing connectivity when the desk is bumped or the cable is moved, combined with the link light flickering or turning off, points to a physical layer issue at the NIC port. Since the cable and switch port have already been replaced and the problem persists, the most likely cause is a damaged or loose pin inside the RJ45 jack on the workstation's NIC. This creates an intermittent electrical contact that breaks under vibration or movement.

Answer

The switch port is failing intermittently

Answer

The workstation has a duplicate IP address on the network

Answer

The DNS server settings are incorrect

Question 2

A user reports that their smartphone will not power on. When they plug it into a charger, the LED indicator flashes red but the screen remains black. The phone was working normally earlier in the day and was not dropped or exposed to water. Which of the following is the MOST likely cause?

Accepted Answer

Faulty battery. The LED indicator flashing red when the charger is connected, combined with a black screen and no prior physical damage or water exposure, strongly points to a battery that has entered a deep discharge state or has failed. In this scenario, the battery cannot hold enough charge to power the phone's boot sequence, but the charging circuit can still detect the charger and attempt to charge, causing the red LED. A faulty battery is the most common cause of a device that was working normally and then suddenly will not power on, especially when the screen remains black but the LED responds.

Answer

Damaged screen

Answer

Failed CPU

Answer

Corrupted firmware

Question 3

A technician is troubleshooting a small office network where users are reporting slow internet speeds. The network consists of a router connected to an unmanaged switch, and several workstations and printers connected to the switch. The technician notices that the cable connecting the router to the switch is a crossover cable. Both the router and the switch support Auto-MDI/X. Which of the following BEST describes the impact of using a crossover cable in this scenario?

Accepted Answer

The crossover cable is not causing the issue; Auto-MDI/X will handle the connection properly. Both the router and the switch support Auto-MDI/X (Automatic Medium-Dependent Interface Crossover), which allows them to automatically detect and correct the signal pairing for either a straight-through or crossover cable. Therefore, the crossover cable does not cause connectivity or speed issues; the slow internet problem must be investigated elsewhere (e.g., bandwidth saturation, duplex mismatch, or faulty hardware).

Answer

The crossover cable will prevent the devices from communicating because crossover cables are only used for connecting two similar devices directly

Answer

The crossover cable is faulty and should be replaced with a straight-through cable

Answer

The crossover cable should be replaced with a straight-through cable to achieve maximum throughput

Question 4

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 5

A technician is troubleshooting a desktop computer that powers on but the monitor displays 'No Signal.' The PC fans spin and the power LED is on. The technician has already reseated the graphics card and tried a different monitor and cable. The motherboard has integrated graphics, but the CPU does not support integrated graphics. The technician checks and finds that the graphics card's power connectors are not all plugged in. The card requires both a 6-pin and an 8-pin PCIe power connector, but only the 6-pin is connected. Which of the following should the technician do NEXT?

Accepted Answer

Connect the 8-pin PCIe power connector from the PSU to the graphics card. The correct next step is to connect the 8-pin PCIe power connector because the graphics card requires both a 6-pin and an 8-pin connector to deliver sufficient power for operation. Without the 8-pin connector, the card may not initialize properly, causing the 'No Signal' issue despite the system appearing to power on. Since the technician has already verified the monitor and cable, and reseated the card, the missing power connection is the most likely root cause.

Answer

Replace the graphics card with a known-good unit

Answer

Remove the graphics card and use the motherboard's integrated graphics

Answer

Update the graphics card driver from the motherboard manufacturer's website

Question 6

A support technician is troubleshooting a user's workstation that can successfully ping the loopback address (127.0.0.1) and the default gateway (192.168.1.1), but cannot access any internet websites. The user's web browser displays 'This site cannot be reached' for all URLs. Other devices on the same network can browse the internet without issue. The technician runs ipconfig and finds: IP 192.168.1.50, subnet mask 255.255.255.0, default gateway 192.168.1.1, DNS server 192.168.1.1. The technician can successfully ping 8.8.8.8 from the affected workstation. Which of the following is MOST likely the cause?

Accepted Answer

The DNS server setting is incorrect or the DNS server is not resolving names. The workstation can ping the loopback (127.0.0.1), the default gateway (192.168.1.1), and even a public IP (8.8.8.8), confirming that IP configuration, local network connectivity, and routing are all functional. However, it cannot resolve domain names to IP addresses, as evidenced by the browser's 'This site cannot be reached' error. Since the DNS server is set to 192.168.1.1 (the gateway), and the gateway is reachable, the issue is that the DNS server itself is not performing name resolution, or the workstation's DNS setting is incorrect (e.g., pointing to a non-functional DNS service on the gateway).

Answer

The default gateway is incorrectly configured

Answer

The network cable is faulty or the switch port is malfunctioning

Answer

The web browser is infected with malware that blocks all websites

Question 7

A desktop computer will not power on. The technician presses the power button, but there are no signs of activity—no fans, no LEDs. The power supply unit (PSU) is securely connected and the wall outlet is working. The technician uses a multimeter to check the PSU's main power connector. The technician finds that the green wire (PS_ON) goes low (0V) when the power button is pressed, indicating the motherboard is sending the signal to turn on. However, no other pins on the main connector show any voltage, and the PSU fan does not spin. Which of the following is the most likely cause?

Accepted Answer

The power supply unit has failed internally.. The green wire (PS_ON) going low (0V) confirms the motherboard is correctly signaling the PSU to turn on. Since no other pins show voltage and the PSU fan does not spin, the PSU is failing to convert AC to DC and distribute power internally, indicating an internal failure. A working PSU would respond to the PS_ON signal by activating its fan and outputting voltages on the other pins.

Answer

The power button is faulty.

Answer

The motherboard is not providing power to the PSU.

Answer

The CPU is not seated correctly.

Question 8

A technician is troubleshooting a desktop PC that intermittently loses network connectivity. The technician has replaced the network cable with a known-good cable and verified that the switch port link light is solid. The issue still occurs. Which of the following should the technician check NEXT?

Accepted Answer

Update or reinstall the network adapter driver. Since the cable and switch port link light are verified good, the issue is likely software or driver-related. Updating or reinstalling the network adapter driver can resolve intermittent connectivity caused by driver corruption, power management conflicts, or incompatibility with the network stack. This is the next logical step after ruling out physical layer problems.

Answer

Check for an IP address conflict on the network

Answer

Change the DNS server settings on the PC

Answer

Adjust the firewall settings on the PC

Question 9

After a user updates their iPhone to the latest iOS version, the device can no longer connect to the cellular network. The SIM card is recognized, Wi-Fi works, and the phone can make calls over Wi-Fi (VoWiFi). The technician performed a network settings reset and a full restore from a backup, but the issue persists. Which of the following is the MOST likely cause?

Accepted Answer

The iPhone's baseband hardware has failed. The symptoms—SIM recognized, Wi-Fi and VoWiFi working, but no cellular connectivity after an iOS update—point to a hardware-level baseband failure. The baseband processor handles cellular radio functions; an update cannot corrupt hardware, but it can expose a pre-existing latent hardware fault. Since a network settings reset and full restore from backup did not resolve the issue, the problem is not software or firmware, leaving physical baseband hardware failure as the most likely cause.

Answer

The SIM card is damaged or locked to a different carrier

Answer

The iOS baseband firmware is corrupted

Answer

The iOS update introduced a compatibility issue with the carrier

Question 10

A user wants to pair a Bluetooth keyboard with their iPad. The keyboard is in pairing mode and has fresh batteries. The iPad's Bluetooth is turned on. The keyboard does not appear in the list of discovered devices. Which of the following should the user try FIRST?

Accepted Answer

Turn Bluetooth off and then back on.. The most common cause of a Bluetooth keyboard not appearing in the device list is a temporary communication glitch between the iPad's Bluetooth radio and the keyboard. Toggling Bluetooth off and then back on forces the radio to reset its discovery cache and re-scan for nearby devices, which often resolves the issue without requiring a full system restart or network reset.

Answer

Restart the iPad.

Answer

Reset all network settings.

Answer

Delete all previously paired Bluetooth devices.

Question 11

A company wants to allow multiple developers to each have their own isolated environment on a single physical server. Each developer needs full control over their own operating system and the ability to install custom applications. Which technology is BEST suited for this requirement?

Accepted Answer

Virtualization. Virtualization (A) is the best choice because it allows multiple virtual machines (VMs) to run on a single physical server, each with its own full operating system (OS) instance. Each developer gets isolated, full control over their OS and can install custom applications, as the hypervisor (e.g., VMware ESXi, Microsoft Hyper-V) abstracts the hardware and allocates dedicated resources (CPU, RAM, storage) per VM.

Answer

Containerization

Answer

Cloud computing

Answer

Dual boot

Question 12

A user reports that their iPhone 14 Pro will not connect to a corporate Wi-Fi network that uses WPA2-Enterprise with 802.1X authentication. The user can see the network in the Wi-Fi list and selects it, but after entering their username and password, the connection fails with a generic 'Unable to join the network' error. Other iOS devices in the office connect to the same network without issues. The technician has already restarted the iPhone, forgotten the network, and re-entered the credentials. Which of the following should the technician try NEXT?

Accepted Answer

Install the required root or authentication certificate on the iPhone.. WPA2-Enterprise with 802.1X authentication requires a RADIUS server and often uses digital certificates (e.g., X.509) to validate the server's identity before the client sends credentials. The generic 'Unable to join the network' error after entering credentials, while other iOS devices connect successfully, strongly indicates a missing or untrusted root or authentication certificate on the iPhone. Installing the required certificate (often via a configuration profile or trusted certificate authority) resolves the trust chain issue, allowing EAP-TLS or PEAP to complete.

Answer

Reset the iPhone's network settings.

Answer

Update the iPhone to the latest version of iOS.

Answer

Change the Wi-Fi security to WPA2-Personal on the access point.

Question 13

A small office has 10 workstations connected to a single unmanaged switch, which is connected to a router that provides internet access. All workstations can access the internet. The manager wants to add a network printer so all workstations can print. The printer has an Ethernet port. Which of the following is the easiest way to connect the printer to the network?

Accepted Answer

Connect the printer to an available port on the switch.. Connecting the printer to an available port on the unmanaged switch places it on the same Layer 2 broadcast domain as the 10 workstations. Since the switch is already connected to the router for internet access, the printer will receive an IP address via DHCP from the router (or via link-local addressing if no DHCP server is present), making it immediately discoverable by all workstations on the network without requiring any additional configuration or dedicated host.

Answer

Connect the printer directly to a workstation's USB port and share it.

Answer

Connect the printer to the router's USB port.

Answer

Connect the printer to the WAN port of the router.

Question 14

A company operates a private cloud for its internal applications. To handle seasonal traffic spikes, the company wants to automatically offload extra workload to a public cloud provider when the private cloud's utilization reaches 80%. Which of the following cloud concepts BEST describes this setup?

Accepted Answer

Hybrid cloud. The setup combines a private cloud (on-premises) with a public cloud provider to handle traffic spikes, which is the defining characteristic of a hybrid cloud. The automatic offloading of workloads when utilization reaches 80% is a classic example of cloud bursting, a key use case for hybrid cloud architectures. This model allows the company to maintain sensitive workloads on-premises while leveraging public cloud elasticity for peak demand.

Answer

Community cloud

Answer

Virtual Private Cloud

Answer

Software as a Service

Question 15

A technician is building a new desktop computer. After installing the motherboard, CPU, heatsink, RAM, and power supply, the computer powers on for a few seconds and then shuts down immediately. The technician has checked all power connections and they are secure. What is the MOST likely cause?

Accepted Answer

The CPU cooler is not installed correctly or the thermal paste is absent.. The system powers on briefly and then shuts down, which is a classic symptom of thermal overload protection. If the CPU cooler is not installed correctly or thermal paste is missing, the CPU temperature skyrockets within seconds, triggering the motherboard's thermal protection circuit to shut down the system to prevent damage. This is the most likely cause given that all power connections are secure.

Answer

The CPU is not compatible with the motherboard.

Answer

The RAM is not seated properly.

Answer

The power supply is defective.