220-1201 Practice Test 28 — 15 Questions

Question 1

A network administrator is troubleshooting a 1000BASE-T connection that is only running at 100 Mbps. The cable is Cat5e and the switch supports Gigabit. The link light is green but the speed is capped. What is the most likely cause?

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

Accepted Answer

One of the four wire pairs is broken or shorted.. 1000BASE-T requires all four wire pairs (eight wires) to operate. If one pair is broken or shorted, the link will auto-negotiate down to 100BASE-TX, which only needs two pairs. The green link light indicates a physical connection, but the speed is capped because the PHY detects the missing pair and falls back to the slower standard.

Answer

The cable is too long for Gigabit.

Answer

The network card is set to 100 Mbps manually.

Answer

The switch port is configured for 100 Mbps.

Question 2

A company is deploying a new branch office in a location where no wired internet is available. They need a reliable connection with moderate speed and low latency for VoIP and video conferencing. Which technology should they consider?

Accepted Answer

Fixed wireless (e.g., point-to-point microwave). Fixed wireless (point-to-point microwave) provides a dedicated, low-latency link ideal for real-time applications like VoIP and video conferencing. Unlike satellite, it avoids the high latency (500-800 ms) caused by geostationary orbits, and unlike cellular, it offers consistent bandwidth without contention from other users in the area.

Answer

Satellite internet

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Cellular 4G/5G hotspot

Answer

Dial-up

Question 3

A technician is replacing the display assembly on a laptop. After installing the new display, the laptop powers on but the screen remains black. The technician has verified the display cable is fully seated at both ends. What should the technician check next to diagnose the issue?

Accepted Answer

Check the backlight voltage or inverter board (if applicable).. A black screen with power but no display often indicates a backlight failure, not a complete display failure. The technician should check the backlight voltage or inverter board (if the display uses CCFL backlighting) to ensure the backlight is receiving power. Since the display cable is verified as seated, the next logical step is to isolate whether the issue is with the backlight circuit or the LCD panel itself.

Answer

Replace the LCD panel again, assuming the new one is defective.

Answer

Update the graphics driver from the Windows Recovery Environment.

Answer

Reseat the RAM modules to ensure proper boot.

Question 4

A technician is asked to run a new network cable from a patch panel to a cubicle 80 meters away. The cable must support at least 1 Gbps. The technician has Cat6 cable on hand. What is the maximum distance this cable will support for 1 Gbps?

Accepted Answer

100 meters. Cat6 cable is rated to support 1 Gbps Ethernet (1000BASE-T) up to a maximum distance of 100 meters per the TIA/EIA-568 standard. Since the required distance is 80 meters, which is within this limit, the cable will support 1 Gbps. The 100-meter limit includes the combined length of the horizontal cable from the patch panel to the cubicle, plus any patch cords at both ends.

Answer

55 meters

Answer

150 meters

Answer

200 meters

Question 5

A technician is setting up a new all-in-one PC for a reception desk. The PC has a touchscreen display. After installation, the touch function does not respond. The technician has verified that the display works and the OS is loaded. What should the technician check first?

Accepted Answer

Check if the touchscreen driver is installed in Device Manager. The most common reason a touchscreen fails to respond after a working display and OS load is a missing or incorrect driver. In Windows, the touchscreen driver appears under 'Human Interface Devices' in Device Manager; if it's not present or has a yellow exclamation mark, the OS cannot interpret touch input. Checking Device Manager is the quickest, non-invasive first step before considering hardware replacement.

Answer

Replace the touchscreen digitizer

Answer

Clean the screen with a microfiber cloth

Answer

Disable and re-enable the touchscreen in BIOS

Question 6

A technician is setting up a new Android tablet for a field sales representative. The tablet needs to connect to the internet via a cellular data plan. The technician inserts a nano-SIM card from the company's carrier, but the tablet shows 'No SIM card' in the status bar. The SIM card works in another tablet. What is the most likely cause?

Accepted Answer

The SIM card is not fully inserted or is inserted incorrectly.. If the SIM card works in another device, the issue is with the tablet itself. The most common cause is that the SIM card is not fully seated or is inserted incorrectly. Some tablets use a tray that requires the SIM to be oriented a specific way. A less common cause is a faulty SIM slot, but that should be checked after verifying correct insertion.

Answer

The tablet's cellular radio is disabled in the settings.

Answer

The SIM card is not compatible with the tablet's LTE bands.

Answer

The tablet requires a software update to enable cellular functionality.

Question 7

A user reports that their laptop's touchpad is not working properly. The cursor jumps around randomly when they try to use the touchpad. An external mouse works fine. Which of the following should the technician do first?

Accepted Answer

Clean the touchpad surface with a soft cloth. Cursor jumping is often caused by a dirty or greasy touchpad surface. Cleaning the touchpad with a soft, lint-free cloth is the simplest and most effective first step before considering driver or hardware issues.

Answer

Update the touchpad driver

Answer

Disable the touchpad in Device Manager and re-enable it

Answer

Replace the touchpad

Question 8

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 9

A technician is configuring a company-issued Android tablet for a field worker who needs to use a VPN to access internal resources. The tablet connects to the internet via cellular data. After setting up the VPN, the user cannot access any internal websites. What should the technician check first?

Accepted Answer

Check the VPN server address and authentication credentials.. The most common cause of VPN connectivity failure after initial setup is incorrect server address or authentication credentials. Since the tablet connects via cellular data (not Wi-Fi), the VPN must be reachable over the internet; a typo in the server hostname/IP or wrong username/password/PSK will prevent the tunnel from establishing, blocking access to internal resources.

Answer

Verify that the tablet's Wi-Fi is enabled.

Answer

Ensure the tablet's date and time are set automatically.

Answer

Disable the firewall on the tablet.

Question 10

A customer wants to connect a Bluetooth keyboard and mouse to their tablet for a presentation. They ask which accessory is needed to ensure both devices work reliably from across the room. What should you recommend?

Accepted Answer

A Bluetooth extender or repeater to boost signal strength.. Bluetooth range is typically limited to about 10 meters (33 feet) under ideal conditions, and obstacles like walls or furniture can reduce this further. A Bluetooth extender or repeater captures the signal from the tablet and retransmits it, effectively boosting the signal strength and extending the reliable operating distance across a room. This ensures both the keyboard and mouse maintain a stable connection without dropouts.

Answer

A USB-C hub with Bluetooth functionality to extend range.

Answer

A Bluetooth adapter plugged into the tablet's charging port.

Answer

A wireless dongle that connects both keyboard and mouse via a single receiver.

Question 11

A company wants to connect two office buildings that are 2 miles apart in the same city to share a high-speed internet connection and internal resources. Fiber optic cable is not an option due to cost. Which network type and technology would be most appropriate?

Accepted Answer

MAN using a point-to-point wireless bridge. A MAN (Metropolitan Area Network) using a point-to-point wireless bridge is the most appropriate choice because it connects two buildings within the same city (a metropolitan area) without the high cost of fiber. A wireless bridge operating in the 5 GHz or 60 GHz band can provide high-speed, dedicated links over distances up to several miles, making it ideal for sharing internet and internal resources between the two sites.

Answer

LAN using CAT6 Ethernet cable

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WAN using a satellite link

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PAN using Bluetooth

Question 12

A user reports that their external monitor connected via HDMI shows a blurry image and the text is hard to read. They have tried a different HDMI cable and the issue persists. What is the most likely cause?

Accepted Answer

The display resolution is set below the monitor's native resolution.. When an external monitor displays a blurry image with hard-to-read text, the most likely cause is that the display resolution is set below the monitor's native resolution. Each LCD monitor has a fixed native resolution (e.g., 1920x1080), and running at any other resolution forces the monitor to scale the image, which introduces blurriness and loss of sharpness. Since the user already tried a different HDMI cable, the cable is not the issue, and a low refresh rate typically causes flickering or motion artifacts, not static blur.

Answer

The HDMI cable is defective.

Answer

The monitor's refresh rate is set too low.

Answer

The graphics driver is corrupted.

Question 13

A technician is installing a new touchscreen monitor for a point-of-sale system. The monitor connects via HDMI and USB. The display works, but touch input is not recognized. What should the technician check first?

Accepted Answer

Install the touchscreen driver from the manufacturer. Touchscreen monitors often require both video (HDMI) and data (USB) connections. The USB cable provides the touch data to the computer. If the driver is missing or the USB connection is faulty, touch input won't work. The first step is to verify the USB connection and install the correct driver.

Answer

Ensure the HDMI cable is securely connected

Answer

Replace the USB cable with a higher-speed version

Answer

Calibrate the touchscreen in Windows settings

Question 14

A user connects a 4K monitor to their laptop using a USB-C port. The monitor is detected, but the resolution is stuck at 1920x1080. The laptop supports 4K output via USB-C. What is the most likely reason?

Accepted Answer

The USB-C cable does not support DisplayPort Alt Mode. The most likely reason is that the USB-C cable does not support DisplayPort Alt Mode. For a USB-C port to output a 4K video signal, the cable must be capable of carrying DisplayPort signals alongside USB data. If the cable is a standard USB 2.0 or 3.x cable without Alt Mode support, the system will fall back to a lower resolution like 1920×1080, even if the laptop and monitor both support 4K.

Answer

The monitor's HDMI port is defective

Answer

The laptop's graphics driver is outdated

Answer

The monitor's refresh rate is set too high

Question 15

A company is upgrading its network to support 10 Gbps connections between server racks. The distance between racks is 25 meters. Which cabling standard is most appropriate for this upgrade?

Accepted Answer

Cat6a cable.. Cat6a cable is the most appropriate choice because it supports 10GBASE-T (10 Gbps) over twisted-pair copper cabling at distances up to 100 meters, which easily covers the 25-meter distance between racks. Cat6a has a bandwidth of 500 MHz, double that of Cat6, and includes improved alien crosstalk (AXT) specifications required for reliable 10 Gbps transmission. This makes it the standard recommendation for 10 Gbps Ethernet in data center environments.

Answer

Cat5e cable.

Answer

Cat6 cable.

Answer

Cat7 cable.