220-1101 Practice Test 27 — 15 Questions

Question 1

A user reports that they can access the internet by typing an IP address (e.g., 8.8.8.8) into their web browser, but they cannot access websites using domain names (e.g., www.example.com). Which of the following network services is MOST likely not functioning correctly?

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

Accepted Answer

Domain Name System (DNS). The user can reach the internet via IP address but not by domain name, which indicates that the system cannot resolve human-readable names to IP addresses. The Domain Name System (DNS) is the service responsible for this translation, so a failure in DNS resolution is the most likely cause. DHCP, HTTP, and FTP are unrelated to name resolution.

Answer

Dynamic Host Configuration Protocol (DHCP)

Answer

Hypertext Transfer Protocol (HTTP)

Answer

File Transfer Protocol (FTP)

Question 2

A company hosts its e-commerce platform on a public cloud. The cloud provider monitors the health of virtual server instances and automatically redirects incoming requests away from any instance that fails to respond. This ensures that the platform remains operational even if individual VMs crash. Which cloud computing characteristic does this scenario BEST illustrate?

Accepted Answer

Fault tolerance. This scenario best illustrates fault tolerance because the cloud provider automatically detects a failed virtual server instance and redirects incoming requests away from it, ensuring the platform continues to operate without interruption. Fault tolerance is the ability of a system to continue functioning even when one or more of its components fail, which is exactly what the automatic redirection of traffic from a crashed VM achieves.

Answer

High availability

Answer

Elasticity

Answer

Resource pooling

Question 3

A technician is troubleshooting a desktop PC that powers on (fans spin, LEDs light up) but does not display anything and produces no POST beeps. The motherboard has four diagnostic LEDs labeled CPU, DRAM, VGA, and BOOT. When the system is powered on, the DRAM LED remains solid red. The technician has verified that the RAM module (single 16GB DDR4 stick) is fully seated in slot A2, as recommended by the motherboard manual. The technician has also reseated the GPU and checked all power connections. Which of the following should the technician do NEXT?

Accepted Answer

Try a different RAM slot. The DRAM LED remaining solid red indicates a memory initialization failure. Since the single RAM stick is already fully seated in the recommended slot A2, the next logical step is to try a different RAM slot (e.g., A1 or B2) to rule out a faulty slot or a subtle contact issue. This is a standard first step in memory troubleshooting before replacing components.

Answer

Replace the motherboard

Answer

Reinstall the CPU, checking for bent pins

Answer

Update the motherboard BIOS

Question 4

A user reports that their laptop's Wi-Fi connection is unreliable and frequently drops. A technician checks Device Manager on the laptop and sees that the wireless adapter is listed with a yellow exclamation mark. Which of the following should the technician do FIRST?

Accepted Answer

Update the wireless adapter driver.. The yellow exclamation mark in Device Manager indicates a driver problem, such as a corrupted, missing, or incompatible driver. Updating the wireless adapter driver is the first logical step because it directly addresses the most common cause of this specific error, restoring proper communication between the OS and the hardware.

Answer

Replace the wireless adapter.

Answer

Disable and re-enable the wireless adapter.

Answer

Check the Wi-Fi antenna connections.

Question 5

A technician is setting up a small office network. The router is configured with DHCP and provides addresses in the 192.168.1.0/24 range. A workstation obtains an IP address of 192.168.1.15 but cannot access any external websites. The workstation can ping the default gateway (192.168.1.1) and other local workstations. Which of the following is the most likely cause?

Accepted Answer

The DNS server address is not configured. The workstation can ping the default gateway and local devices, confirming that Layer 3 connectivity and the default gateway are functional. However, it cannot access external websites, which typically requires DNS resolution to translate domain names to IP addresses. Since the router's DHCP is configured but the workstation lacks a DNS server address, name resolution fails, preventing web access while IP-level communication remains intact.

Answer

The workstation's subnet mask is incorrect

Answer

The default gateway is not set

Answer

The router's DHCP pool is exhausted

Question 6

A network technician connects two switches together using a straight-through Cat6 Ethernet cable. Both switches are managed and are known to be working. After connecting, the link LED on Switch A is off, and the link LED on Switch B is also off. The technician has verified that both switch ports are enabled and not administratively shut down. Which of the following is the MOST likely cause of the problem?

Accepted Answer

At least one switch does not support auto-MDIX.. When two switches are connected directly, auto-MDIX (Automatic Medium-Dependent Interface Crossover) allows either a straight-through or crossover cable to be used by automatically negotiating the transmit/receive pairs. If at least one switch does not support auto-MDIX, a straight-through cable will not work because the transmit pins on one switch will connect to transmit pins on the other, causing a link failure. Since both link LEDs are off and the ports are enabled, the most likely cause is that one or both switches lack auto-MDIX support, requiring a crossover cable instead.

Answer

The cable is a crossover cable.

Answer

The cable length exceeds 100 meters.

Answer

One of the switches has the wrong VLAN assignment.

Question 7

A user reports that they cannot access any websites using their web browser, but they can successfully ping external IP addresses such as 8.8.8.8. Other users on the same network are able to browse the internet normally. The technician checks the workstation's IP configuration and finds the following: 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 ping 192.168.1.1 successfully. Which of the following is the MOST likely cause?

Accepted Answer

DNS server not responding or misconfigured. The user can ping external IP addresses (e.g., 8.8.8.8) and the default gateway (192.168.1.1), confirming that IP routing and the gateway are functional. However, they cannot resolve domain names to IP addresses, which is a classic symptom of DNS failure. Since the DNS server is set to 192.168.1.1 (likely the gateway) and other users on the same network can browse normally, the issue is isolated to this workstation's DNS configuration or the DNS service on that server not responding to this specific client.

Answer

Incorrect subnet mask

Answer

Incorrect default gateway

Answer

Firewall blocking web traffic (port 80/443)

Question 8

A company uses a cloud service that provides virtual machines. The company administrators have full control over the guest operating systems, install their own applications, and manage security patches and updates. The cloud provider is responsible for the underlying physical servers, storage, and networking. This scenario best describes which cloud service model?

Accepted Answer

Infrastructure as a Service (IaaS). This scenario describes Infrastructure as a Service (IaaS) because the company has full control over the guest operating systems, applications, and security patches, while the cloud provider manages the underlying physical infrastructure (servers, storage, networking). In IaaS, the provider delivers virtualized computing resources over the internet, and the customer retains administrative access to the OS and installed software, which matches the description exactly.

Answer

Platform as a Service (PaaS)

Answer

Software as a Service (SaaS)

Answer

Desktop as a Service (DaaS)

Question 9

A technician installs a new VoIP desk phone for a user. The phone is connected to an existing wall jack using a Cat5e patch cable. The switch port on the other end shows a solid link light, but the phone does not power on. The technician verifies that the wall jack is wired correctly and the cable passes a continuity test. Which of the following is the MOST likely reason the phone is not receiving power?

Accepted Answer

The network switch does not support Power over Ethernet (PoE). The phone is not powering on despite a solid link light and a correctly wired, continuity-tested cable. This indicates the switch is providing a data link but not delivering power. The most likely cause is that the network switch does not support Power over Ethernet (PoE), which is required to supply DC power over the same Cat5e cable to the VoIP phone.

Answer

The switch port is administratively disabled

Answer

The patch cable is a crossover cable

Answer

The wall jack is wired with T568A instead of T568B

Question 10

A company hosts a critical web application using a public cloud provider. The application is deployed across two separate data centers in different geographic regions. The cloud provider automatically routes traffic to the healthy region in the event of a full data center outage, with no manual intervention. Which cloud computing characteristic does this BEST describe?

Accepted Answer

High availability. High availability (HA) is the cloud characteristic that ensures an application remains accessible despite failures, often through redundancy and automatic failover. In this scenario, the cloud provider's automatic traffic routing to a healthy region during a full data center outage, without manual intervention, directly demonstrates HA by eliminating a single point of failure and maintaining service continuity.

Answer

Elasticity

Answer

Scalability

Answer

Fault tolerance

Question 11

A technician is repairing a smartphone with a cracked screen. After replacing the screen assembly, the touch screen is completely unresponsive, although the display shows properly. The technician has verified that the digitizer flex cable is firmly seated in the connector on the motherboard. Which of the following should the technician check NEXT?

Accepted Answer

Check that the grounding screw for the digitizer is installed and tight. Many smartphone digitizer assemblies require a dedicated grounding screw to complete the circuit for capacitive touch sensing. Without this ground, the digitizer may receive power and data via the flex cable but cannot establish a stable reference voltage, causing the touch screen to be completely unresponsive even though the display works. The technician has already verified the flex cable connection, so checking the grounding screw is the logical next step.

Answer

Check that the LCD cable is properly connected

Answer

Check the digitizer cable for damage or improper orientation

Answer

Replace the battery

Question 12

A technician is assembling a new desktop computer. After installing the CPU, heat sink, RAM, and power supply, the system powers on for a few seconds and then shuts down. The CPU fan spins during that time. The technician has verified that the power supply connections are secure. Which of the following should the technician check FIRST?

Accepted Answer

The thermal paste application between the CPU and heat sink. The system powers on for a few seconds and then shuts down, which is a classic symptom of thermal overload protection (Tjmax) being triggered. Since the CPU fan spins, power delivery is present, but without proper thermal paste, the CPU rapidly exceeds its critical temperature threshold, causing an immediate shutdown to prevent damage.

Answer

The RAM module's compatibility with the motherboard

Answer

The CPU power connector is fully seated

Answer

The front panel power switch connection

Question 13

A technician is troubleshooting a workstation that loses network connectivity for a few seconds at random intervals. The technician observes that during the outage, the network icon in the system tray shows 'Unidentified network' or 'No internet access', but the IP configuration still shows a valid address from DHCP. The technician has already replaced the NIC and the Ethernet cable. Which of the following should the technician check NEXT?

Accepted Answer

Check the speed and duplex settings on both the NIC and the switch port. The symptom of intermittent connectivity with a valid DHCP address but 'Unidentified network' or 'No internet access' points to a Layer 2 issue, often caused by a speed/duplex mismatch between the NIC and the switch port. When one side is set to auto-negotiation and the other is manually set (or fails to negotiate), the link may appear up but drops frames, causing brief outages. Since the NIC and cable have already been replaced, checking and aligning the speed and duplex settings on both ends is the logical next step.

Answer

Verify that the DNS server is reachable and responsive

Answer

Disable the Windows firewall temporarily

Answer

Increase the DHCP lease time on the router

Question 14

A company hosts a critical database on a virtual machine in a public cloud. The database requires persistent storage that must be retained even if the VM is terminated. The storage must also be accessible from multiple VMs simultaneously for a future high-availability configuration. Which type of cloud storage BEST meets these requirements?

Accepted Answer

File storage. File storage (C) is correct because it provides a shared, persistent file system that can be mounted by multiple VMs simultaneously, typically using NFS or SMB/CIFS protocols. This meets the requirement for persistent storage that survives VM termination and supports concurrent read/write access for a future high-availability configuration.

Answer

Object storage

Answer

Block storage

Answer

Ephemeral storage

Question 15

A system administrator manages a cluster of hosts running a Type 1 hypervisor. The administrator needs to move a virtual machine (VM) from one physical host to another in the cluster without turning off the VM or interrupting its services. The hypervisor supports this capability. Which of the following features should the administrator use?

Accepted Answer

Live migration. Live migration (also known as vMotion in VMware environments) allows a running virtual machine to be moved between physical hosts with zero downtime and no service interruption. The hypervisor transfers the VM's memory state and storage access over a dedicated network while the VM continues to operate, then briefly pauses execution to switch over the final state. This matches the requirement of moving a VM without turning it off or interrupting services.

Answer

High availability

Answer

Snapshot

Answer

Cloning