220-1201 Practice Test 20 — 15 Questions

Question 1

A user reports that their tablet's screen is completely black but the device vibrates when powered on. You have already tried a forced restart and checked for physical damage. What is the most likely hardware cause?

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

Accepted Answer

The LCD panel or display ribbon cable is faulty.. The device vibrating on power-on indicates the system board, processor, and power management are functioning, but the display subsystem is not. Since a forced restart and physical damage inspection have been ruled out, the most likely hardware cause is a faulty LCD panel or a damaged display ribbon cable connecting the mainboard to the screen. This explains why the device is operational (vibration) yet the screen remains black.

Answer

The battery is completely drained.

Answer

The digitizer is cracked.

Answer

The OS is corrupted.

Question 2

A user reports that their smartphone's charging port is loose and the cable falls out easily, making it difficult to charge. The technician inspects the port and sees no visible debris. What is the most likely cause and the appropriate repair?

Accepted Answer

The charging port has worn-out pins; replace the charging port assembly.. The user reports a loose physical connection with no visible debris, which points to mechanical wear of the port's internal retention mechanism (e.g., the spring-loaded pins or the port's latch). Since the cable falls out easily, the most likely cause is worn-out pins inside the charging port assembly, and the appropriate repair is to replace the entire charging port assembly, as individual pins cannot be serviced separately.

Answer

The charging cable is defective; replace the cable.

Answer

Use compressed air to blow out the port.

Answer

Apply a small amount of super glue to the port to tighten it.

Question 3

A technician is deploying a fleet of tablets for a retail store that uses a captive portal for guest Wi-Fi. After connecting to the Wi-Fi, the tablets do not automatically open the login page. What is the most likely missing configuration?

Accepted Answer

The tablets have a static IP address configured.. A captive portal intercepts HTTP traffic and redirects the client to a login page, typically by performing a DNS or HTTP redirect. If the tablet has a static IP address configured, it may not receive the DHCP options (e.g., option 114 for captive portal URL) or the proper DNS server settings, preventing the redirect from functioning. Without a valid DHCP lease, the tablet cannot be redirected to the captive portal login page.

Answer

The tablets are using a VPN.

Answer

The Wi-Fi network is hidden.

Answer

The tablets have Bluetooth disabled.

Question 4

A technician is troubleshooting a network where users intermittently lose connectivity to a critical database server. The technician notices that the server's IP address is being duplicated on the network. Which protocol is responsible for detecting and reporting this conflict?

Accepted Answer

ARP. The Address Resolution Protocol (ARP) is responsible for detecting and reporting IP address conflicts. When a device sends an ARP probe or gratuitous ARP, it announces its IP address; if another device responds, a conflict is detected. This mechanism allows the operating system to alert the user or log the error, as seen in Windows with the 'IP address conflict' notification.

Answer

DHCP

Answer

ICMP

Answer

DNS

Question 5

A technician is setting up a new wireless network for a small office. The office has three access points (APs) that should allow seamless roaming. The technician configures all APs with the same SSID and security settings. What additional configuration is necessary to prevent clients from staying connected to a weak signal?

Accepted Answer

Adjust the minimum RSSI value on each AP. Adjusting the minimum RSSI (Received Signal Strength Indicator) value on each AP forces clients to roam away from an AP when the signal drops below a configured threshold. This prevents sticky clients from holding onto a weak signal, which is essential for seamless roaming in a multi-AP environment with the same SSID.

Answer

Set each AP to a different channel to avoid interference

Answer

Enable WPA3 encryption on all APs

Answer

Configure the APs with different SSIDs for each AP

Question 6

A user reports that their 4K monitor connected via DisplayPort 1.2 only shows a 30Hz refresh rate at native resolution, causing mouse movement to feel laggy. The monitor supports 60Hz at 4K. What is the most likely cause?

Accepted Answer

The DisplayPort cable is only rated for DisplayPort 1.1. DisplayPort 1.2 has sufficient bandwidth (17.28 Gbps) to support 4K at 60Hz with 8-bit color. However, a cable only rated for DisplayPort 1.1 is limited to 8.64 Gbps, which cannot handle the full data rate required for 4K at 60Hz, forcing the signal to drop to 30Hz. This is the most likely cause because the cable is a physical bottleneck, even though the GPU and monitor both support the higher refresh rate.

Answer

The monitor's firmware is outdated

Answer

The graphics card does not support 4K at 60Hz

Answer

The monitor's refresh rate is set to 30Hz in the display settings

Question 7

A user wants to connect their laptop to a 4K external monitor using a USB-C port that supports DisplayPort Alt Mode. The monitor has only HDMI input. Which adapter or cable is required?

Accepted Answer

USB-C to HDMI adapter. The laptop's USB-C port supports DisplayPort Alt Mode, which can carry a DisplayPort signal over the USB-C connector. Since the monitor only has HDMI input, a USB-C to HDMI adapter converts the DisplayPort signal from Alt Mode into an HDMI-compatible signal, enabling the 4K video output.

Answer

USB-C to USB-A adapter

Answer

USB-C to DisplayPort cable

Answer

USB-C to VGA adapter

Question 8

A user reports that their iPhone will not connect to a Bluetooth speaker that is in pairing mode. The speaker is listed in the iPhone's Bluetooth settings but tapping it does nothing. What should the technician try first?

Accepted Answer

Forget the speaker in Bluetooth settings and re-pair.. When a Bluetooth speaker is listed in the iPhone's settings but tapping it fails to connect, the most common cause is a corrupted pairing record. Selecting 'Forget This Device' removes the stored link key, forcing a fresh pairing handshake that re-establishes the correct encryption and service discovery. This is the first-line troubleshooting step because it directly addresses the stored connection state without affecting other network settings or requiring a device restart.

Answer

Restart the iPhone.

Answer

Reset the network settings on the iPhone.

Answer

Update the speaker's firmware.

Question 9

A user reports that their new Bluetooth headset pairs with their smartphone but no audio is heard during calls. The headset works fine with another phone. What is the most likely cause?

Accepted Answer

The phone is not using the correct Bluetooth profile for calls.. The most likely cause is that the phone is not using the correct Bluetooth profile for calls. Bluetooth headsets require the Hands-Free Profile (HFP) or Headset Profile (HSP) for bidirectional audio during calls. If the phone defaults to the Advanced Audio Distribution Profile (A2DP) for media streaming instead, audio will not route through the headset for calls. Since the headset works with another phone, the issue is specific to the phone's profile selection or configuration.

Answer

The headset battery is low.

Answer

The headset is out of Bluetooth range.

Answer

The phone's Bluetooth radio is faulty.

Question 10

A technician is troubleshooting a fiber optic connection where the ONT (Optical Network Terminal) has a red 'LOS' (Loss of Signal) light. The fiber cable appears intact. What should the technician check next?

Accepted Answer

Inspect and clean the fiber connector.. A red LOS (Loss of Signal) light on the ONT indicates that no light is being received from the optical line terminal (OLT) at the central office. Since the fiber cable appears intact, the most likely cause is a dirty or damaged connector at the ONT or the wall jack, which can attenuate the optical signal below the receiver threshold. Cleaning the fiber connector with a proper one-click cleaner or inspection scope is the standard next step before considering hardware replacement.

Answer

Replace the ONT immediately.

Answer

Check the power supply to the ONT.

Answer

Reboot the router connected to the ONT.

Question 11

A network administrator configures a router to use OSPF for dynamic routing between two branch offices. After configuration, routes from one office are not appearing in the other's routing table. Both offices can ping each other's directly connected interfaces. Which protocol issue is most likely preventing route exchange?

Accepted Answer

Multicast is not being forwarded between the routers.. OSPF uses multicast address 224.0.0.5 (AllSPFRouters) to exchange hello packets and LSAs. If multicast forwarding is disabled or blocked between the routers (e.g., by an ACL, switchport configuration, or lack of multicast routing), OSPF neighbors will not form, and routes will not be exchanged. Since both offices can ping each other's directly connected interfaces, Layer 3 unicast connectivity exists, but OSPF's multicast-based neighbor discovery is failing.

Answer

The routers are using different OSPF area IDs.

Answer

The routers are using different OSPF process IDs.

Answer

The routers have mismatched subnet masks on their interfaces.

Question 12

During a site survey, a technician finds that a new access point on the 2.4 GHz band is experiencing heavy interference. The access point automatically selected channel 6. Which action should the technician take to minimize interference?

Accepted Answer

Change the channel to 1 or 11.. In the 2.4 GHz band, only channels 1, 6, and 11 are non-overlapping (each occupies 22 MHz with 5 MHz spacing). Since channel 6 is already experiencing heavy interference, moving to channel 1 or 11 avoids co-channel and adjacent-channel interference from other devices on or near channel 6, minimizing contention.

Answer

Enable WPA3 encryption to reduce interference.

Answer

Set the channel width to 40 MHz.

Answer

Disable the 2.4 GHz radio and use only 5 GHz.

Question 13

A user complains that their smartphone frequently disconnects from the office Wi-Fi and then reconnects after a few seconds. The issue occurs only when the user walks to a specific part of the building. What is the most likely cause?

Accepted Answer

The smartphone is encountering a Wi-Fi dead zone due to building materials.. The issue occurs only when the user walks to a specific part of the building, which strongly indicates a physical obstruction or signal absorption by building materials (e.g., concrete, metal studs, or rebar). Wi-Fi signals in the 2.4 GHz and 5 GHz bands attenuate significantly when passing through dense materials, creating localized dead zones where the client device loses connectivity and then reconnects upon moving back into range. This matches the symptom of frequent disconnects and reconnects tied to a specific location.

Answer

The smartphone's battery saver mode is turning off Wi-Fi.

Answer

The office access point is overloaded with too many connections.

Answer

The smartphone's Wi-Fi antenna is loose.

Question 14

A technician is troubleshooting a laptop that cannot connect to a 5 GHz Wi-Fi network, but it connects to 2.4 GHz networks without issue. The laptop's Wi-Fi adapter supports both bands. What is the most likely cause?

Accepted Answer

The laptop is too far from the access point, or there are obstructions blocking the 5 GHz signal.. The most likely cause is distance or obstructions because 5 GHz signals have higher attenuation and shorter range compared to 2.4 GHz. Since the laptop connects to 2.4 GHz but not 5 GHz, and the adapter supports both bands, the physical environment is the primary suspect — 5 GHz is more easily blocked by walls, furniture, or simply being too far from the access point.

Answer

The 5 GHz network is using a channel not supported by the laptop's Wi-Fi adapter.

Answer

The laptop's Bluetooth is interfering with the 5 GHz Wi-Fi.

Answer

The 5 GHz network requires WPA3, which the laptop does not support.

Question 15

A technician is troubleshooting a user's computer that can reach internal servers by IP address but not by hostname. Other computers on the same subnet work correctly. Which tool should the technician use to check the computer's DNS resolution?

Accepted Answer

nslookup. The user's computer can reach internal servers by IP address but not by hostname, and other computers on the same subnet work correctly. This isolates the problem to the local DNS resolution on the affected machine. The `nslookup` tool is specifically designed to query DNS servers and verify whether a hostname resolves to the correct IP address, making it the appropriate tool to diagnose the DNS resolution failure.

Answer

Ping

Answer

ipconfig /flushdns

Answer

Netstat