220-1201 Practice Test 17 — 15 Questions

Question 1

A small office has a network with a single switch and a wireless access point (WAP). Users on the wired network can access the internet, but wireless users cannot. The WAP shows a solid green power LED and a blinking amber activity LED. What is the most likely cause?

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

Accepted Answer

The Ethernet cable from the WAP to the switch is faulty or not securely connected.. The solid green power LED indicates the WAP is receiving power, and the blinking amber activity LED typically signals a Layer 1 issue, such as a faulty or loose Ethernet cable. Since wired users have internet access, the switch and upstream connectivity are fine, isolating the problem to the link between the WAP and the switch. A faulty cable prevents the WAP from communicating with the network, so wireless clients cannot reach the internet even though the WAP is powered on.

Answer

The WAP is configured with the wrong SSID.

Answer

The switch port is configured as a trunk port.

Answer

The WAP's wireless radio is disabled in the firmware.

Question 2

A network administrator is configuring a small business network with two subnets: 192.168.1.0/24 for employees and 192.168.2.0/24 for guests. The router has two LAN interfaces with IPs 192.168.1.1 and 192.168.2.1. A technician connects a new access point to the guest subnet switch and configures it with a static IP of 192.168.2.50. The access point can ping the router's guest interface but cannot reach the internet. The router's default route points to an ISP modem at 203.0.113.1. What is the most likely missing configuration?

Accepted Answer

NAT is not enabled for the 192.168.2.0/24 subnet on the router.. The access point can ping the router's guest interface (192.168.2.1), confirming Layer 2 and Layer 3 connectivity within the guest subnet. However, it cannot reach the internet, which indicates that the router is not performing Network Address Translation (NAT) for the 192.168.2.0/24 subnet. Without NAT, private IP addresses from the guest subnet are not translated to the router's public IP, so the ISP modem drops the return traffic because it has no route back to the private range.

Answer

The access point's default gateway is set to 192.168.1.1.

Answer

The access point has a duplicate IP address.

Answer

The ISP modem is blocking traffic from the guest subnet.

Question 3

A technician is servicing a tablet that will not power on. The technician has confirmed the battery is charged by testing it with a multimeter (voltage within spec). The power button feels normal when pressed. What is the most likely hardware component that has failed, and how should it be addressed?

Accepted Answer

Reseat or replace the power button flex cable.. The power button flex cable is the most likely failed component because the battery is confirmed good (voltage within spec) and the power button itself feels normal, indicating the button mechanism is intact but the electrical connection to the motherboard is broken. Reseating or replacing the flex cable restores the circuit that signals the power management IC to initiate boot, which is a common failure point in tablets due to flex cable wear or loose connection.

Answer

Replace the LCD screen assembly.

Answer

Replace the motherboard.

Answer

Perform a hard reset by holding the power and volume buttons for 30 seconds.

Question 4

A technician is troubleshooting a connectivity issue where a user's computer can ping the default gateway but cannot access a web server at 203.0.113.50. The technician runs a tracert and sees that the first hop responds, but subsequent hops time out. What is the most likely cause?

Accepted Answer

A router along the path is misconfigured or dropping packets.. The tracert output shows the first hop (the default gateway) responds, confirming the user's computer can reach the local network. The subsequent timeouts indicate that packets are being dropped or discarded beyond the gateway, which points to a misconfigured router or a router along the path that is dropping packets (e.g., due to an ACL, routing loop, or MTU issue). This explains why the user can ping the gateway but cannot reach the web server at 203.0.113.50.

Answer

The default gateway is down.

Answer

The web server is offline.

Answer

The user's computer has a duplicate IP address.

Question 5

A technician is configuring a network printer for secure printing using IPsec. After enabling IPsec on the printer and the print server, print jobs fail to reach the printer. The technician can ping the printer from the server. Which protocol negotiation step is most likely failing?

Accepted Answer

The IPsec security association (SA) is not being established due to IKE failure.. IPsec requires the Internet Key Exchange (IKE) protocol to negotiate and establish a security association (SA) between the printer and the print server. Since the technician can ping the printer, basic network connectivity (including ARP and IP routing) is working, but the print jobs fail because the IPsec SA is not established. An IKE failure—often due to mismatched pre-shared keys, authentication methods, or IKE phase parameters—prevents the encrypted tunnel from forming, causing all IPsec-protected traffic to be dropped.

Answer

The printer is not responding to ARP requests.

Answer

The printer's TCP/IP stack is misconfigured.

Answer

The print server is using the wrong port number.

Question 6

A user complains that their wireless mouse and keyboard stop working when they move more than 10 feet away from the computer. The devices use a USB dongle. Which network type is being used for these peripherals?

Accepted Answer

Personal Area Network (PAN). Personal Area Network (PAN), because wireless mice and keyboards that connect via a USB dongle typically use Bluetooth or a proprietary 2.4 GHz RF protocol, which creates a short-range PAN. The 10-foot range limitation is characteristic of PAN technologies, which are designed for personal device connectivity within a few meters, not for broader network coverage.

Answer

Local Area Network (LAN)

Answer

Wide Area Network (WAN)

Answer

Metropolitan Area Network (MAN)

Question 7

A user complains that their VoIP phone intermittently loses audio during calls. The phone is connected to a PoE switch. The technician checks the switch and sees that the port's PoE power budget is at 95% capacity. What is the most likely cause of the audio drops?

Accepted Answer

The switch is power-cycling the phone due to PoE power budget constraints.. When a PoE switch's power budget reaches 95% capacity, it may begin to prioritize power delivery, potentially power-cycling lower-priority devices like VoIP phones to free up power for critical devices. This intermittent power loss causes the audio drops, as the phone reboots or loses power momentarily. The issue is directly tied to PoE power management, not cable length, hardware faults, or VLAN configuration.

Answer

The Ethernet cable is too long, causing signal attenuation.

Answer

The VoIP phone is faulty and needs replacement.

Answer

The switch port is configured with a VLAN mismatch.

Question 8

A customer wants to use a 34-inch ultrawide monitor (3440x1440) with their desktop PC. The PC has an older GPU with a DVI-D dual-link port and an HDMI 1.4 port. Which connection should the technician recommend for the best image quality?

Accepted Answer

HDMI 1.4. HDMI 1.4 supports 3440x1440 at up to 75 Hz, which is sufficient for the monitor's typical 60 Hz refresh rate. DVI-D dual-link is limited to 2560x1600 at 60 Hz and cannot deliver the full 3440x1440 resolution. Therefore, HDMI 1.4 provides the best image quality among the available ports.

Answer

DVI-D dual-link

Answer

VGA

Answer

DisplayPort

Question 9

A network administrator is setting up a new branch office. The branch router must automatically obtain a public IP address from the ISP, and internal devices must receive private IP addresses from the router. Which combination of network services should be configured on the router?

Accepted Answer

DHCP client and DHCP server. The branch router needs to obtain a public IP address automatically from the ISP, which requires it to act as a DHCP client on its WAN interface. At the same time, internal devices need private IP addresses, so the router must also act as a DHCP server on its LAN interface, leasing addresses from a private range. Option B correctly combines both roles: DHCP client on the WAN side and DHCP server on the LAN side.

Answer

DHCP client and DNS server

Answer

DHCP server and NAT

Answer

DNS server and NAT

Question 10

A small business uses a router with a default IP of 192.168.1.1. The owner wants to set up a new printer with a static IP of 192.168.1.50. After configuring the printer, it cannot be accessed from any computer on the network. All computers are set to obtain IP addresses automatically. What is the most likely problem?

Accepted Answer

The printer's IP address conflicts with an address already assigned by DHCP.. The printer's static IP (192.168.1.50) likely falls within the router's default DHCP pool (commonly 192.168.1.2–192.168.1.254 or a subset like 192.168.1.100–199). If the router has already assigned 192.168.1.50 to another device via DHCP, a duplicate IP conflict occurs, causing the printer to be unreachable. The printer may appear to have an IP, but the conflict prevents proper ARP resolution and communication.

Answer

The printer's subnet mask is set to 255.0.0.0.

Answer

The printer's IP address is outside the router's DHCP range.

Answer

The printer is not connected to the network via an Ethernet cable.

Question 11

A customer reports that their laptop can connect to the internet at home but not at a coffee shop. The coffee shop uses a /24 subnet with a gateway of 192.168.1.1. The laptop's IP is 192.168.2.10. What is the most likely cause?

Accepted Answer

The laptop's IP address is on a different subnet than the coffee shop's network.. The coffee shop's network uses a /24 subnet (255.255.255.0), which means all devices must have an IP address in the 192.168.1.0/24 range to communicate with the gateway at 192.168.1.1. The laptop's IP address of 192.168.2.10 falls in a different subnet (192.168.2.0/24), so the laptop cannot send frames to the gateway or receive a DHCP lease, preventing internet access despite a successful Wi-Fi association.

Answer

The DNS server address is incorrect.

Answer

The wireless card is faulty.

Answer

The subnet mask is set to 255.0.0.0.

Question 12

A technician is setting up a new wireless network for a warehouse. The warehouse has metal shelving and concrete walls. Which wireless standard should the technician choose to maximize range and penetration through obstacles?

Accepted Answer

802.11ax (Wi-Fi 6). 802.11ax (Wi-Fi 6) operates in both the 2.4 GHz and 5 GHz bands. For maximizing range and penetration through obstacles like metal shelving and concrete walls, the 2.4 GHz band is crucial due to its lower frequency and better diffraction characteristics. While 802.11n also uses 2.4 GHz, 802.11ax offers significant advancements such as OFDMA, improved MU-MIMO, and more efficient modulation schemes (e.g., 1024-QAM). These technologies lead to a more robust and efficient signal, which can provide better effective range and reliability in challenging environments compared to 802.11n, even when both are operating in the 2.4 GHz band.

Answer

802.11ac

Answer

802.11n

Answer

802.11a

Question 13

A user is traveling internationally and complains that their smartphone's cellular data stopped working after landing. They have an international roaming plan activated. What should the technician check first to restore data connectivity?

Accepted Answer

Ensure that the device's data roaming setting is enabled.. When traveling internationally, cellular data requires the device's data roaming setting to be enabled to connect to foreign networks. Even with an active international roaming plan, the smartphone will not automatically use data on a visited network unless this setting is turned on. This is a standard requirement across GSM and LTE networks, as data roaming is disabled by default to prevent unexpected charges.

Answer

Verify that the SIM card is not locked to the home carrier.

Answer

Check if the device's date and time are set correctly.

Answer

Reset the device's network settings to default.

Question 14

A technician is configuring a small network with five computers and a printer. The network must use private IP addresses and allow all devices to communicate. The technician assigns IPs manually but forgets to set a default gateway on one computer. Which functionality will be lost on that computer?

Accepted Answer

Ability to access the internet. The default gateway is the router's IP address that provides a path to networks outside the local subnet. Without a default gateway, the computer can still communicate with other devices on the same local network (like the printer and other computers) using ARP and direct MAC addressing, but it cannot reach any destination outside its own subnet, including the internet. The technician manually assigned IPs, so DHCP is not involved, and DNS resolution would still work for local names but would fail for external names only because the DNS query packets cannot leave the subnet without a gateway.

Answer

Ability to communicate with the printer

Answer

Ability to obtain an IP address via DHCP

Answer

Ability to resolve DNS names

Question 15

A user reports that their computer's clock is consistently off by several minutes, causing authentication failures with the domain. The network uses Active Directory. Which service should be checked first?

Accepted Answer

NTP. NTP (Network Time Protocol) is the correct service to check first because the symptom—a clock consistently off by several minutes causing authentication failures with an Active Directory domain—is a classic sign of time synchronization issues. Active Directory uses Kerberos for authentication, which requires the client and domain controller clocks to be within a default skew of 5 minutes (RFC 4120). If the time is off, Kerberos tickets are rejected, leading to authentication failures.

Answer

DHCP

Answer

DNS

Answer

RADIUS