220-1201 Practice Test 37 — 15 Questions

Question 1

A user's iPhone 14 cannot make or receive calls, but can send iMessages and use the internet. The user has not changed any settings recently. What is the most likely cause?

Accepted Answer

The carrier settings need to be updated.. The ability to send iMessages and use the internet indicates that the device has a working data connection (cellular or Wi-Fi), but the inability to make or receive calls points to a problem with the carrier-specific settings that control voice services. Carrier settings updates are pushed by the carrier to configure network parameters such as APN, MMS, and voice-over-LTE (VoLTE) settings; if these are outdated or corrupted, voice calls may fail while data services remain functional. Since the user has not changed any settings, an automatic or pending carrier settings update is the most likely cause, as it can resolve mismatches between the device and the carrier's network.

Answer

The phone is in Airplane Mode.

Answer

The SIM card is damaged.

Answer

The phone's microphone is broken.

Question 2

A user reports that they can only access the internet intermittently. The technician runs ipconfig and sees an IPv4 address of 192.168.1.105 with a subnet mask of 255.255.255.0 and a default gateway of 192.168.1.1. The technician pings the gateway successfully, but pings to 8.8.8.8 fail. What is the most likely issue?

Accepted Answer

The router's WAN connection is down or misconfigured.. The technician can ping the local gateway (192.168.1.1) successfully, which confirms that Layer 2 and Layer 3 connectivity within the local subnet is working and that the user's IP configuration is valid. However, pings to the public DNS server 8.8.8.8 fail, indicating that traffic cannot reach the internet. Since the gateway is reachable but external IPs are not, the most likely cause is that the router's WAN connection is down or misconfigured, preventing traffic from being routed beyond the local network.

Answer

The user's computer has a duplicate IP address.

Answer

The DNS server is not resolving addresses.

Answer

The user's firewall is blocking ICMP traffic.

Question 3

A technician is deploying a new virtual machine on a Type 2 hypervisor (hosted) for software testing. The host machine runs Windows 10 Pro with 16 GB RAM and a quad-core CPU. The test application requires 4 GB RAM and two virtual CPUs. After creating the VM with those settings, the technician notices the host becomes extremely sluggish even when the VM is idle. What is the most likely reason for this?

Accepted Answer

The host machine’s CPU does not support Intel VT-x or AMD-V.. Type 2 hypervisors rely on hardware virtualization extensions (Intel VT-x or AMD-V) to run virtual machines efficiently. If the host CPU does not support these extensions (or they are disabled in the BIOS), the hypervisor falls back to software emulation, which imposes heavy overhead on the host CPU. This overhead is present even when the VM is idle because the hypervisor must constantly manage emulated instructions. With the host running Windows 10 Pro and a quad-core CPU, the software emulation can cause the host to become sluggish. Allocating only 4 GB RAM to the VM leaves 12 GB for the host, which is sufficient for Windows 10 Pro and typical background processes, so option C is unlikely to be the cause.

Answer

The hypervisor does not support hardware acceleration for the guest OS.

Answer

The technician allocated too much RAM to the VM, leaving insufficient memory for the host OS.

Answer

The virtual switch is misconfigured, causing network loops.

Question 4

A company's multifunction printer supports faxing over VoIP. Users report that faxes are frequently incomplete or fail to send. The fax line is connected to an analog telephone adapter (ATA). What should you check first?

Accepted Answer

Check the ATA's configuration to ensure T.38 fax relay is enabled.. 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.

Answer

Replace the fax modem card in the printer.

Answer

Increase the printer's print resolution.

Answer

Disable the printer's firewall.

Question 5

During a repair, you accidentally dislodged a small ribbon cable connecting the volume button flex to the mainboard of a smartphone. Now the volume buttons don't work. What is the most likely result of this mistake?

Accepted Answer

The volume buttons become unresponsive.. The volume button flex cable directly connects the physical volume buttons to the mainboard. Dislodging this cable interrupts the electrical circuit that carries the button press signal, so the buttons become unresponsive. This is a direct physical disconnection, not a software or power issue.

Answer

The phone won't power on.

Answer

The touchscreen becomes unresponsive.

Answer

The speaker stops producing sound.

Question 6

A technician is troubleshooting a user's computer that cannot access a web server at 10.10.10.50. The user's IP is 10.10.20.15 with subnet mask 255.255.0.0. The technician can ping 10.10.10.50 from the user's computer. What should the technician check next?

Accepted Answer

The web server's firewall settings.. Since the technician can successfully ping the web server (10.10.10.50) from the user's computer, Layer 3 connectivity is verified. This rules out issues with the user's IP configuration, subnet mask, and default gateway. The problem is therefore specific to the web server's firewall blocking HTTP/HTTPS traffic (port 80/443) while allowing ICMP (ping). Checking the web server's firewall settings is the logical next step.

Answer

The default gateway setting on the user's computer.

Answer

The user's IP address for a conflict.

Answer

The subnet mask on the user's computer.

Question 7

A large corporation needs to connect its headquarters in New York to a regional office in Los Angeles, as well as to a data center in Chicago, using dedicated leased lines. The network must support high bandwidth for video conferencing and data transfers. Which network topology best describes this setup?

Accepted Answer

Wide Area Network (WAN). A Wide Area Network (WAN) is the correct topology because it connects geographically dispersed locations—New York, Los Angeles, and Chicago—over a large geographical area using dedicated leased lines (e.g., T1/E1, T3, or MPLS circuits). WANs are specifically designed to provide high-bandwidth, reliable connectivity for applications like video conferencing and data transfers across cities or countries, which matches the requirement for dedicated leased lines spanning multiple states.

Answer

Local Area Network (LAN)

Answer

Metropolitan Area Network (MAN)

Answer

Personal Area Network (PAN)

Question 8

A user reports that their new Thunderbolt 4 external GPU (eGPU) is not recognized by their laptop, which has a Thunderbolt 4 port. The eGPU works on another laptop. Which connector-related issue is most likely?

Accepted Answer

The cable used is a passive USB-C cable, not an active Thunderbolt 4 cable.. Thunderbolt 4 requires an active cable for full functionality, and a passive USB-C cable may not carry the PCIe signal needed for eGPU operation. This tests understanding of Thunderbolt cable requirements and the difference between passive and active cables.

Answer

The laptop's Thunderbolt 4 port is disabled in BIOS.

Answer

The eGPU requires a Thunderbolt 3 port, not Thunderbolt 4.

Answer

The laptop's Thunderbolt 4 port is not providing enough power.

Question 9

A technician is setting up a small office with 15 devices and needs to assign private IP addresses. The router's LAN interface is 10.0.0.1/24. Which of the following is a valid IP address for a workstation on this network?

Accepted Answer

10.0.0.50. (10.0.0.50) is correct because the router's LAN interface is configured with the IP address 10.0.0.1 and a subnet mask of /24 (255.255.255.0). This defines the network as 10.0.0.0/24, which includes usable host addresses from 10.0.0.1 to 10.0.0.254. 10.0.0.50 falls within this valid host range.

Answer

10.0.1.50

Answer

10.0.0.0

Answer

10.0.0.255

Question 10

A multinational corporation has offices in New York, London, and Tokyo. They need a private, dedicated network to connect all offices with high reliability and low latency. Which network type should be implemented?

Accepted Answer

Wide Area Network (WAN). A Wide Area Network (WAN) is the correct choice because it is designed to connect geographically dispersed locations, such as offices in different cities or countries, over a large area. WANs provide private, dedicated circuits (e.g., MPLS, leased lines) that offer high reliability and low latency, meeting the multinational corporation's requirements for interconnecting New York, London, and Tokyo.

Answer

Local Area Network (LAN)

Answer

Metropolitan Area Network (MAN)

Answer

Personal Area Network (PAN)

Question 11

A user reports that their laptop's keyboard types random characters when certain keys are pressed. The laptop has not been dropped or spilled on. What is the most likely hardware issue?

Accepted Answer

The keyboard has an internal short or faulty controller.. A keyboard with an internal short or faulty controller can cause erratic behavior like typing random characters when keys are pressed. This occurs because the short or controller failure disrupts the matrix scanning process, sending incorrect key codes to the system. Since the laptop was not dropped or spilled, physical damage like a loose ribbon cable is less likely, making an internal component failure the most probable hardware cause.

Answer

The keyboard driver is corrupted.

Answer

The keyboard ribbon cable is loose.

Answer

The operating system has a malware infection.

Question 12

A user complains that their external monitor flickers intermittently when connected via a VGA cable to their laptop. The laptop has a VGA port, and the monitor works fine with another computer. Which connector-related issue is most likely?

Accepted Answer

A bent pin inside the VGA connector is causing poor contact.. 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.

Answer

The monitor's resolution is set too high for the VGA cable.

Answer

The laptop's VGA port is not providing enough power.

Answer

The VGA cable is not compatible with the laptop's graphics card.

Question 13

A customer reports that their internet connection drops frequently during rainstorms. They have a cable modem and a wireless router. What is the most likely cause of the intermittent connection?

Accepted Answer

The cable modem's coaxial cable connection is compromised by moisture.. Cable internet relies on a coaxial cable connection from the street to the modem. During rainstorms, moisture can seep into damaged or poorly sealed coaxial connectors or cable sheathing, causing signal attenuation or intermittent shorting that drops the connection. This is a classic symptom of RF signal degradation due to water ingress, which directly affects the physical layer (Layer 1) of the cable modem's link.

Answer

The wireless router is overheating.

Answer

The DSL filter is malfunctioning.

Answer

The satellite dish is out of alignment.

Question 14

During a hardware install, you connect a new 4K monitor to a desktop PC using an HDMI cable. The display shows a 'No Signal' message. The PC boots normally and the monitor is powered on. What is the most likely cause?

Accepted Answer

The HDMI cable is not rated for 4K bandwidth.. The 'No Signal' error most commonly occurs because the HDMI cable lacks sufficient bandwidth to transmit the 4K signal. Many standard HDMI cables are only rated for lower resolutions. If the cable is not High Speed or Premium High Speed HDMI, it may not support 4K at the required refresh rate. The PC boots normally, indicating the GPU is working. BIOS refresh rate settings are rarely used with modern monitors, and power supply is not a factor for monitor signal. Input source mismatch is possible, but if the user connected via HDMI, the monitor should automatically detect it.

Answer

The monitor's refresh rate is set too high in the BIOS.

Answer

The PC's power supply is insufficient for the new monitor.

Answer

The monitor's input source is set to VGA instead of HDMI.

Question 15

A small office uses a single public IP address for internet access. The network administrator wants internal web servers to be reachable from the internet on port 80. Which network service should be configured on the router to allow this?

Accepted Answer

Port forwarding. Port forwarding (option B) is the correct answer because it allows the router to translate incoming traffic on a specific public IP address and port (e.g., TCP 80) to a specific internal private IP address and port of the web server. This is a form of Destination NAT (DNAT) that enables external hosts to reach internal services when only a single public IP is available.

Answer

DHCP

Answer

DNS

Answer

VPN