220-1201 Practice Test 41 — 15 Questions

Question 1

A small office has a single internet connection and needs to allow multiple internal devices to share that connection. The router's public IP is assigned by the ISP. Which network service must be enabled on the router to allow internal devices to communicate with external servers?

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

Accepted Answer

NAT. NAT (Network Address Translation) is required because it allows multiple internal devices with private IP addresses to share a single public IP address assigned by the ISP. When internal devices send traffic to external servers, NAT translates the private source IP and port to the router's public IP and a unique port, enabling responses to return to the correct internal host. Without NAT, the router would drop packets from private addresses destined for the internet, as they are not routable on the public internet.

Answer

DHCP

Answer

DNS

Answer

PAT

Question 2

A technician is troubleshooting a network where users can access the internet but cannot reach a specific internal web server by its hostname. The server's IP is 10.0.0.5, and pinging 10.0.0.5 works. The technician checks the DNS server and finds an A record for the server's name pointing to 10.0.0.10. What is the most likely issue?

Accepted Answer

The DNS A record is incorrect. The DNS A record maps the server's hostname to 10.0.0.10, but the server's actual IP is 10.0.0.5. Since pinging the IP works, the network path to the server is functional; the failure to reach it by hostname is due to DNS resolving to the wrong address. This is a classic DNS misconfiguration where the A record does not match the server's assigned IP.

Answer

The DHCP server assigned the wrong IP to the server

Answer

The router's port forwarding is misconfigured

Answer

The server's firewall is blocking DNS queries

Question 3

A user reports that their desktop computer cannot connect to the internet, but other devices on the same network work fine. You check the patch cable from the wall jack to the PC and find it is a Cat5e cable. The PC's network adapter shows a link light, but no activity. What should you do first?

Accepted Answer

Check the IP address configuration on the PC to see if it has a valid address.. The link light indicates Layer 1 (physical) connectivity is present, so the cable and switch port are likely functional. The lack of activity suggests the PC is not successfully communicating at Layer 3, often due to an incorrect or missing IP address. Checking the IP configuration (e.g., with `ipconfig` or `ifconfig`) is the logical first step to verify if the PC has a valid address from DHCP or is set to an APIPA range (169.254.x.x), which would prevent internet access.

Answer

Replace the Cat5e cable with a Cat6 cable.

Answer

Reboot the switch in the wiring closet.

Answer

Replace the network adapter in the PC.

Question 4

A customer reports that their new Gigabit Ethernet connection is only achieving 100 Mbps speeds. The cable run is 75 meters through a drop ceiling and uses a Cat5e cable. What is the most likely cause of the speed limitation?

Accepted Answer

The cable is actually Cat5, not Cat5e.. Cat5e is rated for Gigabit Ethernet (1000BASE-T) up to 100 meters. However, if the cable is actually Cat5 (not Cat5e), it is only certified for 100 Mbps (100BASE-TX) at that distance. The 75-meter run is within spec for Cat5e, so the most likely cause is that the installed cable is Cat5, which cannot reliably support 1000BASE-T.

Answer

The cable is too long for Cat5e.

Answer

The cable is shielded and causing interference.

Answer

The network switch port is faulty.

Question 5

A user on a corporate iPhone cannot receive push notifications from the company's email app, even though notifications are enabled in the app settings. Other apps on the phone receive notifications normally. What should the technician check first?

Accepted Answer

Check the notification settings for the email app in iOS Settings.. The problem is isolated to a single app (the email app) while other apps receive notifications normally. This indicates the issue is not with the device's system-wide notification settings (like Do Not Disturb) but rather with the app-specific notification permissions within iOS Settings. The technician should first check the notification settings for the email app in iOS Settings to ensure that 'Allow Notifications' is toggled on and that the desired alert styles (e.g., banners, sounds, badges) are configured correctly, as these settings override any in-app notification preferences.

Answer

Verify that the device is not in Do Not Disturb mode.

Answer

Reinstall the email app to reset its configuration.

Answer

Update the iPhone to the latest iOS version.

Question 6

A technician is configuring a high-performance workstation for scientific simulations that require large amounts of RAM. The motherboard has eight DDR4 slots and supports quad-channel memory. The technician installs four 16 GB sticks in the correct slots for quad-channel mode. After booting, the system reports 64 GB of RAM but only runs in dual-channel mode. What is the most likely cause?

Accepted Answer

The installed CPU only supports dual-channel memory.. Quad-channel memory operation depends on the CPU's integrated memory controller supporting four channels. If the installed CPU only has a dual-channel memory controller (common on many consumer and even some workstation chips), the motherboard will populate all four DIMMs but can only operate them in dual-channel mode. The reported 64 GB confirms all sticks are detected, so the limitation is the CPU, not the DIMMs or slots.

Answer

The RAM sticks are not identical in speed and timings.

Answer

The motherboard BIOS needs to be configured to enable quad-channel mode.

Answer

The RAM is installed in the wrong slots for quad-channel operation.

Question 7

A user reports that their internet connection drops out frequently, especially during rainstorms. They have a dish mounted on their roof. Which connection type are they most likely using?

Accepted Answer

Satellite. Satellite internet (Option C) is the correct answer because the user's dish is mounted on the roof, and the connection drops out during rainstorms—a phenomenon known as 'rain fade.' Rain attenuates the Ku-band or Ka-band radio frequencies (typically 12–18 GHz or 26–40 GHz) used by satellite systems, causing signal loss. Fiber-optic, cable, and DSL are terrestrial connections that do not use a roof-mounted dish and are not significantly affected by rain.

Answer

Fiber-optic

Answer

Cable broadband

Answer

DSL

Question 8

A small office uses a network switch with 24 RJ45 ports to connect all workstations. The switch is connected to the router via a single uplink port. Users report intermittent network drops. The technician suspects a faulty cable between the switch and router. Which tool should be used to test the cable?

Accepted Answer

Cable tester. A cable tester is the correct tool to verify continuity, pinout, and signal integrity on a copper Ethernet cable between the switch and router. It can detect opens, shorts, miswired pairs, and split pairs that cause intermittent link drops. This directly addresses the technician's suspicion of a faulty uplink cable.

Answer

Tone generator and probe

Answer

Loopback plug

Answer

Multimeter

Question 9

A technician is setting up a wireless network for a small office that experiences heavy interference from neighboring businesses. The office uses many Bluetooth devices and cordless phones. Which 802.11 standard and frequency combination would minimize interference and provide the best performance?

Accepted Answer

802.11ac on 5 GHz. 802.11ac operates exclusively on the 5 GHz frequency band, which is far less congested than 2.4 GHz. This avoids interference from Bluetooth devices and cordless phones (which predominantly use 2.4 GHz), providing cleaner channels and better performance in a dense interference environment.

Answer

802.11b/g on 2.4 GHz

Answer

802.11n on 2.4 GHz

Answer

802.11ax on 2.4 GHz

Question 10

A user cannot connect to a remote server using RDP. The network team confirms that the firewall allows outbound traffic on all ports. Which port is typically used for RDP and should be verified on the server side?

Accepted Answer

Port 3389. RDP (Remote Desktop Protocol) uses TCP port 3389 by default. Since the firewall allows outbound traffic on all ports, the issue is likely that the server-side firewall or the RDP service is not listening on port 3389, or the port is blocked inbound on the server's firewall. Verifying that port 3389 is open and the RDP service is running on the server is the correct next step.

Answer

Port 22

Answer

Port 23

Answer

Port 5900

Question 11

A user reports that they cannot access any websites by typing domain names, but they can access websites by entering IP addresses directly. The technician suspects a DNS issue. Which command should the technician use first to verify the DNS server settings on the user's Windows 10 computer?

Accepted Answer

ipconfig /all. The ipconfig /all command shows the complete IP configuration, including DNS server addresses, which are essential to verify when name resolution fails. Since the user can reach sites by IP, the problem likely lies with DNS settings or the DNS server itself. Checking the configured DNS servers is the first step before testing resolution with tools like nslookup or ping.

Answer

ping

Answer

netstat -an

Answer

nslookup

Question 12

A user complains that their laptop frequently disconnects from the Wi-Fi when they move to the conference room, which is 50 feet from the access point through two walls. The network uses 5 GHz. What is the MOST likely cause of the disconnects?

Accepted Answer

5 GHz signals have poor penetration through walls.. The 5 GHz band offers higher data rates and less interference than 2.4 GHz, but it has significantly poorer wall penetration due to its shorter wavelength. At 50 feet through two walls, the signal attenuation is severe enough to cause frequent disconnects, especially if the walls contain dense materials like concrete or metal studs.

Answer

The access point is overloaded with too many clients.

Answer

The laptop's power management settings are turning off the Wi-Fi adapter.

Answer

The conference room has a metal door that blocks the signal.

Question 13

A technician is deploying 50 company-owned Android tablets for field workers. The tablets must only run a single custom business app and prevent users from accessing any other apps or settings. Which configuration method should the technician use?

Accepted Answer

Use a Mobile Device Management (MDM) solution to configure kiosk mode.. A Mobile Device Management (MDM) solution with kiosk mode is the correct approach because it locks the device to a single app, disables access to system settings, and prevents users from launching other applications. MDM enforces this via device policy controllers (DPC) and Android's lock task mode, which cannot be bypassed by the user. This meets the requirement of deploying 50 tablets with a single custom business app and no access to other apps or settings.

Answer

Enable 'Developer options' and set the app as the default launcher.

Answer

Perform a factory reset and install only the custom app.

Answer

Remove the Google Play Store app from the device.

Question 14

A customer reports that their laser printer is producing pages with faint, streaky text and occasional blank spots. The toner cartridge is new, and the printer's maintenance kit was replaced last month. Which component should be inspected next?

Accepted Answer

Imaging drum. The imaging drum is the correct component to inspect because faint, streaky text with blank spots on a laser printer typically indicates a worn or damaged drum surface that cannot hold a uniform electrostatic charge to attract toner. Since the toner cartridge is new and the maintenance kit was recently replaced, the drum (often a separate consumable) is the next likely culprit.

Answer

Fuser assembly

Answer

Transfer roller

Answer

Pickup rollers

Question 15

After replacing a motherboard, a technician finds that the PC will not power on at all. The power supply fan does not spin, and no LEDs light up. The PSU was working before the replacement. What is the most likely cause?

Accepted Answer

The front panel power switch header is not connected correctly. If the PSU fan does not spin and no LEDs illuminate, the system is not receiving the power-on signal, which is typically delivered by the front panel power switch header. After a motherboard replacement, it is very common to misconnect or omit the front panel header, so the PSU never gets the PS_ON# signal and remains off. The PSU itself was working before the swap, making the header the most likely culprit.

Answer

The power supply is dead

Answer

The CPU is not compatible with the new motherboard

Answer

The RAM is not seated properly