220-1201 Practice Test 29 — 15 Questions

Question 1

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 2

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 3

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 4

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 5

A small business owner wants to set up a network that covers three separate buildings within a 200-meter radius, with no internet access required between them. They need a simple, low-cost solution that can be installed quickly without running cables between buildings. Which network type should be recommended?

Accepted Answer

Wireless Local Area Network (WLAN). A Wireless Local Area Network (WLAN) is the best choice because it can connect multiple buildings using wireless bridges or mesh networking, covering a 200-meter radius without cables. It is simple, low-cost, and does not require internet access. WPAN (Bluetooth/ZigBee) has too short a range (typically <100m) for inter-building connections. MAN and WAN are designed for larger geographic areas and often involve higher costs and internet connectivity.

Answer

Wireless Personal Area Network (WPAN)

Answer

Metropolitan Area Network (MAN)

Answer

Wide Area Network (WAN)

Question 6

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 7

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 8

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 9

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 10

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

Question 11

A user reports that their iPad will not rotate the screen when the device is turned sideways, even though rotation lock is off. The issue started after a recent iOS update. What is the most likely cause?

Accepted Answer

The rotation lock is enabled in the Control Center.. The most common cause of screen rotation failure after an iOS update is that the update resets or changes Control Center settings, re-enabling the rotation lock. The user may have rotation lock off in Settings but it can be toggled on in Control Center without their knowledge, as iOS updates can alter Control Center configurations. The accelerometer and display driver are unlikely to be affected by a standard iOS update, and the issue is system-wide, not app-specific.

Answer

The accelerometer sensor is damaged.

Answer

The app being used does not support landscape mode.

Answer

The iOS update corrupted the display driver.

Question 12

A customer wants to connect two switches in different buildings about 150 meters apart. The link must support at least 1 Gbps. Which cabling solution is most appropriate?

Accepted Answer

Single-mode fiber optic cable.. Single-mode fiber optic cable is the most appropriate solution because it supports 1 Gbps over distances far exceeding 150 meters, with typical reach up to 10 km or more. Unlike copper cabling, single-mode fiber is immune to electromagnetic interference (EMI) and signal degradation over longer runs, making it ideal for inter-building connections where electrical isolation and distance are critical factors.

Answer

Cat6a copper cable.

Answer

Cat5e copper cable with a repeater.

Answer

Coaxial cable with a balun.

Question 13

A user reports that their computer's hard drive makes a clicking noise and the system occasionally freezes. Which action should you take first?

Accepted Answer

Back up the user's data as soon as possible.. Clicking noises from a hard drive often indicate mechanical failure (head crash). Immediate backup of critical data is the priority before further troubleshooting or replacement.

Answer

Run CHKDSK to repair file system errors.

Answer

Replace the hard drive immediately.

Answer

Update the hard drive firmware.

Question 14

A small office has a single public IP address and uses a router to provide internet access to 20 devices. Users report that some websites load slowly or time out, while others work fine. The router's NAT table shows many entries. Which protocol is most likely being exhausted, causing these intermittent issues?

Accepted Answer

NAT. The router's NAT table has many entries, indicating that the single public IP address is being heavily used to translate private IPs for 20 devices. When the NAT table exhausts its available port mappings (typically 65,535 per public IP, but often limited by router resources), new outbound connections cannot be established, causing some websites to time out while existing connections continue to work. This is a classic symptom of NAT overload (PAT) exhaustion.

Answer

DNS

Answer

DHCP

Answer

ICMP

Question 15

A laptop's built-in webcam is not recognized by any application. You have checked Device Manager and the camera is not listed. The webcam ribbon cable appears intact. Which component should you suspect next?

Accepted Answer

The webcam module or motherboard USB controller has failed.. Since the webcam is not listed in Device Manager at all, the issue is at the hardware detection level, not the driver or software level. An intact ribbon cable suggests the webcam module itself or the motherboard's USB controller (which typically handles the internal webcam as a USB device) has failed, preventing enumeration. Option C correctly identifies this hardware failure as the next logical suspect.

Answer

The webcam driver is outdated.

Answer

The laptop's BIOS has the webcam disabled.

Answer

The operating system needs to be reinstalled.