220-1101 Practice Test 10 — 10 Questions

Question 1

A network technician is setting up a wireless access point (AP) for a small business. The company's router provides DHCP for the 192.168.1.0/24 network. The AP needs to broadcast two SSIDs: one for employees and one for guest users. The guest network must be completely isolated from the employee network and internal resources, while both SSIDs must have internet access. The AP is connected to a managed switch. Which configuration will BEST meet these requirements?

Accepted Answer

Configure VLANs on the managed switch and set the AP to tag the employee SSID on VLAN 10 and the guest SSID on VLAN 20; configure trunk port on switch to the AP. Option B is correct because it uses VLANs to logically separate the employee and guest traffic at Layer 2. By configuring the managed switch port as a trunk with VLAN 10 (employee) and VLAN 20 (guest), and having the AP tag each SSID to its respective VLAN, the guest network is isolated from the employee network and internal resources. The router can then route both VLANs to the internet via separate subinterfaces or a Layer 3 switch, ensuring both SSIDs have internet access while maintaining isolation.

Answer

Place both SSIDs on the same subnet and enable client isolation on the AP

Answer

Configure a DHCP reservation on the router for the AP and set the guest SSID to use a static IP in a different subnet

Answer

Disable the guest network's ability to access the default gateway by changing the AP's management settings

Question 2

A small office has 12 computers connected to a single unmanaged switch, which is connected to a router providing internet access. Users report that at random times, all computers lose internet connectivity for a few seconds, then it returns. The technician observes that when the problem occurs, the lights on the switch do not change, but a Ping to the router fails. The technician has replaced the router and the switch, but the issue persists. Which of the following is the MOST likely cause?

Accepted Answer

B: A user's device acting as a rogue DHCP server. The correct answer is B because a rogue DHCP server can assign invalid IP addresses (e.g., from a different subnet or with a wrong default gateway) to clients, causing intermittent connectivity loss. When a user's device (e.g., a laptop with Internet Connection Sharing enabled or a misconfigured router) responds to DHCP DISCOVER messages faster than the legitimate router, clients receive bad configuration and lose internet access for the lease duration. The fact that the switch and router were replaced without resolution points to a device on the LAN acting as a rogue DHCP server, which is not eliminated by hardware swaps.

Answer

A: A bad Ethernet cable between the switch and router

Answer

C: A failing network card in one of the computers

Answer

D: A misconfigured firewall rule on the router

Question 3

A technician installs a new CPU in a desktop computer. The motherboard supports both 8th and 9th generation Intel Core processors. After assembly, the system powers on, all fans spin, but the monitor displays 'No Signal' and the motherboard's diagnostic LEDs cycle through and then stay lit on the CPU indicator. The technician has already reseated the CPU and inspected the socket for bent pins, finding none. The RAM and GPU are known to work from another system. Which of the following should the technician do NEXT?

Accepted Answer

Update the motherboard BIOS to a version that supports the 9th generation CPU. The motherboard's diagnostic LED staying lit on the CPU indicates a CPU initialization failure. Since the motherboard supports both 8th and 9th generation CPUs but may require a BIOS update to add microcode for 9th generation support, the most likely cause is an incompatible BIOS version. Updating the BIOS to a version that includes support for the 9th generation CPU will resolve the issue.

Answer

Replace the power supply unit with one of higher wattage

Answer

Replace the CPU with a different unit of the same model

Answer

Clear the CMOS by removing the battery

Question 4

A small office uses a router with a built-in switch and a separate wireless access point. Users on the wired network can access the internet and internal resources, but wireless users cannot access any internal resources. Wireless users can connect to the access point and obtain an IP address in the 192.168.2.0/24 range, while wired users are on 192.168.1.0/24. The router's LAN interface is 192.168.1.1/24, and the access point is connected to the router's switch port and has an IP of 192.168.1.100/24. Which of the following is the MOST likely cause?

Accepted Answer

The router does not have a route between the two subnets.. The router's LAN interface is on 192.168.1.0/24, and the access point is connected to that same subnet with IP 192.168.1.100/24. Wireless clients receive IPs in 192.168.2.0/24, which is a different subnet. For traffic from 192.168.2.0/24 to reach internal resources on 192.168.1.0/24, the router must have a route between these two subnets. Without that route, the router drops or fails to forward packets, isolating wireless users from internal resources.

Answer

The access point is not configured as a bridge.

Answer

The wireless network encryption is set incorrectly.

Answer

The access point's DHCP server is conflicting with the router.

Question 5

A technician is setting up a small network. The modem from the ISP provides a single public IP address via DHCP. The technician needs to connect 10 computers to the internet using a single public IP. Which device should the technician install between the modem and the computers to accomplish this?

Accepted Answer

Router with NAT capabilities. The modem provides a single public IP address via DHCP, but 10 computers need internet access. A router with NAT (Network Address Translation) allows multiple devices to share that single public IP by translating their private IP addresses (e.g., 192.168.1.x) to the public IP for outbound traffic, and mapping return traffic back to the correct internal device. This is the standard solution for IPv4 address conservation in small networks.

Answer

Hub

Answer

Switch

Answer

Bridge

Question 6

A systems administrator is migrating on-premises servers to a cloud environment. The administrator needs to ensure that the virtual machines in the cloud are isolated from each other by network segmentation but can communicate with specific on-premises servers through a secure encrypted tunnel. Which of the following should the administrator configure in the cloud?

Accepted Answer

A Virtual Private Cloud (VPC) with subnets and a VPN gateway. A Virtual Private Cloud (VPC) provides network isolation through logically defined subnets, and a VPN gateway establishes an encrypted tunnel (typically using IPsec) to securely connect the cloud VPC to on-premises servers. This combination meets the requirements of network segmentation and secure communication without exposing resources to the public internet.

Answer

A virtual switch with VLAN tagging and a proxy server

Answer

A network address translation (NAT) gateway and a DMZ

Answer

A load balancer and a firewall appliance

Question 7

A technician is building a high-performance workstation for 3D rendering. The motherboard supports PCIe 4.0 and has three PCIe x16 slots. The technician installs two identical graphics cards for SLI. After installing the cards and connecting the SLI bridge, the system boots but only one card is detected. Both cards have power connected. The technician checks BIOS settings and confirms the slots are set to x16 mode. Which of the following is the MOST likely cause?

Accepted Answer

The motherboard chipset does not support SLI.. The motherboard chipset does not support SLI, which is required for NVIDIA's Scalable Link Interface to combine two GPUs. Even though the motherboard has three PCIe x16 slots and supports PCIe 4.0, SLI support is a chipset-level feature; many chipsets (e.g., Intel B660, H610) lack official SLI certification. Without chipset support, the system will only detect one GPU regardless of correct installation, power, or BIOS settings.

Answer

The SLI bridge is faulty.

Answer

The PSU does not provide enough wattage.

Answer

The drivers are not installed correctly.

Question 8

A technician is installing a new CPU on a compatible motherboard. After placing the CPU in the socket, the technician installs the heatsink and fan, connects the fan header to the motherboard, and powers on the system. The system powers on (fans spin, LEDs light) but immediately shuts down after about 3 seconds. Which of the following should the technician check FIRST?

Accepted Answer

Check if the CPU power connector (4/8-pin) is connected to the motherboard. The immediate shutdown after power-on indicates a power delivery issue, most commonly the CPU power connector (4/8-pin EPS12V) not being connected. Without this connector, the CPU receives no power, causing the system to start and then shut down as the motherboard detects the fault. This is the first thing to check because it is a simple, common oversight during CPU installation.

Answer

Check the PSU voltage output with a multimeter

Answer

Check if thermal paste was applied to the CPU

Answer

Check if the RAM is properly seated

Question 9

A technician builds a new desktop computer. When starting the system for the first time, the screen displays a 'CPU Fan Error' message and the system prompts to press F1 to continue. The technician checks the CPU cooler fan and observes that it is spinning. Which of the following should the technician check NEXT?

Accepted Answer

The CPU fan is connected to a case fan header instead of the CPU fan header. The 'CPU Fan Error' message is triggered when the motherboard does not detect a fan connected to the dedicated CPU fan header (usually labeled CPU_FAN). Even if the fan is spinning, connecting it to a case fan header (SYS_FAN or CHA_FAN) will not satisfy the CPU fan monitoring circuit, as the BIOS specifically polls the CPU_FAN header for a tachometer signal. This is the most likely cause given the fan is physically operational.

Answer

The CPU thermal paste was applied insufficiently

Answer

The power supply is not providing enough power to the fan

Answer

The CPU heatsink is not properly seated on the CPU

Question 10

A system administrator deploys a Type 1 hypervisor on a physical host with 16 GB of RAM. The administrator creates four virtual machines, each configured with 8 GB of allocated memory. Despite the total allocation being 32 GB, all four VMs operate normally without any performance degradation. The administrator checks and sees that the host's memory usage is steady at 85%. Which virtualization feature is MOST likely enabling this configuration?

Accepted Answer

Memory overcommitment. Memory overcommitment allows a hypervisor to allocate more virtual memory to VMs than the physical host actually has, relying on the fact that VMs rarely use their full allocation simultaneously. In this scenario, the host has 16 GB of RAM but the VMs are configured with a total of 32 GB; the hypervisor (Type 1) uses memory overcommitment to assign only the memory actually needed by each VM, keeping host usage at 85% (approximately 13.6 GB) without performance degradation.

Answer

Memory ballooning

Answer

Dynamic memory allocation

Answer

Virtual memory paging