220-1201 Timed Practice Test 3 — 10 Questions

Question 1

A technician is configuring a router with two interfaces: WAN (DHCP from ISP) and LAN (static IP 10.0.0.1/24). The technician sets the LAN subnet mask to 255.255.255.0. A workstation is assigned IP 10.0.0.100/24 and can ping the router, but cannot access the internet. The router's WAN interface has IP 203.0.113.5/30. What is the most likely missing configuration?

10 minute time limit — choose an answer to begin.

Accepted Answer

The router lacks a default route pointing to the ISP's gateway.. The workstation can ping the router's LAN interface (10.0.0.1), confirming Layer 2 and basic IP connectivity on the LAN. However, for the workstation to reach the internet, the router must have a default route (0.0.0.0/0) pointing to the ISP's next-hop gateway (likely 203.0.113.6, the other end of the /30 WAN link). Without this route, the router does not know where to forward packets destined for external networks, even though the WAN interface has a valid IP from DHCP.

Answer

The workstation's default gateway is set to 10.0.0.1.

Answer

The WAN subnet mask should be 255.255.255.0.

Answer

The LAN subnet mask should be 255.255.0.0.

Question 2

A user's smartphone can connect to a corporate Wi-Fi network but cannot access any internet sites. Other devices on the same network work fine. The smartphone shows it is connected with full signal. What is the most likely cause?

Accepted Answer

The smartphone's DNS settings are misconfigured or pointing to a non-functional server.. The smartphone can connect to the Wi-Fi network (Layer 2 connectivity is fine) and other devices work, so the issue is specific to this device's higher-layer configuration. DNS resolution is required to translate domain names to IP addresses; if the smartphone's DNS settings point to a non-functional or incorrect server, it will fail to resolve any hostname, preventing internet access even though the network connection itself is active. This matches the symptom of being connected with full signal but unable to browse.

Answer

The corporate network is blocking the smartphone's MAC address.

Answer

The smartphone's Wi-Fi adapter is faulty.

Answer

The corporate proxy server is down.

Question 3

A user complains that their wireless Bluetooth earbuds frequently disconnect during calls when their smartphone is in their pocket. The earbuds work fine when the phone is on a desk. Which accessory or configuration change is most likely to resolve this issue?

Accepted Answer

A Bluetooth neckband style headset. The issue is that the smartphone's Bluetooth antenna is being physically blocked or attenuated by the user's body (specifically the leg/torso) when the phone is in a pocket. A Bluetooth neckband-style headset places the Bluetooth receiver and antenna around the user's neck, which is typically above the pocket and has a clearer line-of-sight to the phone, significantly reducing signal obstruction and multipath interference. This configuration change directly addresses the physical signal path problem without requiring any software or network changes.

Answer

A Bluetooth signal booster app

Answer

A metal phone case

Answer

A Wi-Fi analyzer to change router channels

Question 4

A technician is troubleshooting a smartphone that can send and receive text messages but cannot make or receive phone calls. The device shows full signal bars. Which network setting is most likely misconfigured?

Accepted Answer

The device's preferred network type is set to 'LTE only' and VoLTE is disabled.. When a smartphone shows full signal bars but cannot make or receive voice calls while SMS works, the most likely cause is that the device is set to 'LTE only' as its preferred network type and VoLTE (Voice over LTE) is disabled. SMS can be carried over LTE via IMS (IP Multimedia Subsystem) or fallback to circuit-switched networks, but voice calls require either VoLTE or a circuit-switched fallback (CSFB) to 2G/3G. With 'LTE only' selected and VoLTE off, the device cannot initiate or accept voice calls because it lacks a circuit-switched connection and has no fallback path.

Answer

The device's data roaming is turned off.

Answer

The device's Bluetooth is enabled.

Answer

The device's airplane mode is turned on.

Question 5

A technician is troubleshooting a home network where the 5 GHz band works fine, but the 2.4 GHz band is extremely slow and drops connections. The router is placed near a cordless phone base station. Which type of interference is most likely occurring?

Accepted Answer

RF interference from the cordless phone base. The 2.4 GHz band is shared by many consumer devices, including cordless phones that operate in the 2.4 GHz ISM band. The proximity of the router to the cordless phone base station causes RF interference, which degrades the 2.4 GHz signal, leading to slow speeds and dropped connections, while the 5 GHz band remains unaffected because it operates on a different frequency range.

Answer

Bluetooth interference

Answer

Microwave oven interference

Answer

Co-channel interference from a neighboring Wi-Fi network

Question 6

A technician is configuring a tablet for field workers who need to transfer large files to a central server. The tablet has a USB-C port. Which connection method provides the fastest data transfer speed?

Accepted Answer

USB 3.1 Gen 2 over USB-C. USB 3.1 Gen 2 over USB-C supports a maximum signaling rate of 10 Gbps, which is significantly faster than any wireless or NFC option. For transferring large files to a central server, this wired connection provides the highest throughput and lowest latency, making it the optimal choice for the scenario.

Answer

Bluetooth 5.0

Answer

Wi-Fi 5 (802.11ac)

Answer

NFC

Question 7

A technician is installing a new SSD into a customer's laptop. After removing the bottom cover, they see the existing hard drive is held in place by a metal bracket and a single screw. What is the correct next step?

Accepted Answer

Remove the screw and bracket, then gently lift the drive out of the SATA connector.. The correct next step is to remove the screw and bracket, then gently lift the drive out of the SATA connector. This is because the metal bracket secures the drive in place, and the SATA connector is a fragile, keyed interface that requires a straight, gentle pull to avoid damaging the pins or the drive's edge connector. Forcing the drive or prying it can bend pins or crack the connector.

Answer

Pull the drive straight out with force to disconnect it.

Answer

Use a plastic spudger to pry the drive from the connector.

Answer

Remove the battery first to avoid electrical shock.

Question 8

A user reports that their internet connection is extremely slow, and they notice the modem's 'DSL' light is blinking. They have a DSL connection. What does the blinking DSL light indicate?

Accepted Answer

The modem is trying to establish a DSL sync.. A blinking DSL light on a modem indicates that the modem is actively attempting to establish synchronization (sync) with the DSLAM (Digital Subscriber Line Access Multiplexer) at the provider's central office. This process involves training the line to negotiate a stable connection speed and protocol, such as ADSL or VDSL, and typically takes 30–60 seconds. A solid DSL light confirms successful sync, while a blinking light means the handshake is still in progress or has failed.

Answer

The modem is receiving data.

Answer

The modem is not connected to the phone line.

Answer

The modem has a firmware error.

Question 9

A technician is deploying a new server that requires RAID 10 for data redundancy and performance. The motherboard has an onboard RAID controller. After configuring the RAID array in the UEFI RAID utility, the technician installs the OS, but the RAID volume is not visible in the OS installer. What is the most likely cause?

Accepted Answer

The RAID driver is missing from the OS installation media.. The RAID volume is configured in the UEFI RAID utility, but the OS installer cannot see it because the installer lacks the driver for the onboard RAID controller. During Windows installation, the setup environment only includes drivers for common storage controllers; if the RAID controller is not natively supported, the volume will not appear until the driver is loaded. The technician must provide the driver via USB or other media during installation.

Answer

The RAID array was not properly initialized in the UEFI RAID utility.

Answer

The SATA mode is set to AHCI instead of RAID in the UEFI.

Answer

The UEFI boot mode is set to Legacy, which does not support RAID.

Question 10

A user reports that they cannot access any websites, but they can ping the IP address of a public DNS server (8.8.8.8). What is the most likely misconfigured network service?

Accepted Answer

DNS. The user can ping 8.8.8.8, confirming that IP connectivity and routing are working, but cannot access websites by name. This indicates that the system cannot resolve domain names to IP addresses, which is the function of DNS. A misconfigured DNS server address (e.g., pointing to a non-existent or unreachable DNS server) would cause this exact symptom.

Answer

DHCP

Answer

NAT

Answer

Proxy