220-1201 Practice Test 26 — 15 Questions

Question 1

A technician is troubleshooting a network where a user's computer cannot obtain an IP address via DHCP. The computer is connected to a switch, and other devices on the same switch work fine. The technician checks the switch and sees that the port is up and the link light is green. What should the technician check next?

Accepted Answer

Check if the switch port is configured with Port Security that is blocking the MAC address.. This question tests troubleshooting methodology for DHCP issues. Since the link light is green, the physical layer is fine. The next logical step is to check if the port is configured with a feature like Port Security that might be blocking the DHCP request, or if the port is in a blocking state due to STP. The correct answer is to check if the switch port is configured with Port Security that might be limiting MAC addresses.

Answer

Replace the Ethernet cable.

Answer

Reboot the DHCP server.

Answer

Set a static IP address on the computer.

Question 2

A customer reports that their network printer is not accessible from any computer on the network. The printer is connected to a switch via Ethernet, and the switch port LED is blinking green. The technician pings the printer's IP address from a computer and gets no reply. What is the most likely cause?

Accepted Answer

The printer has an IP address conflict with another device.. This question tests understanding of network connectivity and switch port status. A blinking green LED typically indicates traffic, but the ping failure suggests the printer is not responding. The most likely cause is that the printer has a static IP address that conflicts with another device on the network, or the printer's network settings are misconfigured. The correct answer is an IP address conflict.

Answer

The printer's Ethernet cable is faulty.

Answer

The switch port is administratively down.

Answer

The printer's print spooler service is stopped.

Question 3

A network engineer is designing a new data center and needs to connect multiple servers to a core switch with redundant paths. To prevent loops while allowing failover, which networking hardware feature should be implemented?

Accepted Answer

Enable Rapid Spanning Tree Protocol (RSTP) on all switches.. This question tests knowledge of Spanning Tree Protocol (STP) and its variants. In a network with redundant links, STP is essential to prevent broadcast storms and loops. The correct answer is to enable Rapid Spanning Tree Protocol (RSTP) on the switches, which provides faster convergence than classic STP.

Answer

Enable Link Aggregation Control Protocol (LACP) on the server connections.

Answer

Use a hub instead of a switch for the core connection.

Answer

Configure all switch ports as access ports.

Question 4

A technician is setting up a small office network with a router, a switch, and a wireless access point. The router has only one LAN port. The technician needs to connect the switch and the WAP to the router, but the switch has no uplink port. Which hardware component should the technician use to connect both devices to the router?

Accepted Answer

Connect the router to the switch, then connect the WAP to the switch.. This question tests knowledge of network topology and the use of additional switches. Since the router has only one LAN port, a switch is needed to expand the number of available ports. The correct answer is to connect the router to the switch, and then connect the WAP to the switch. The switch's ports are typically all the same, so no special uplink port is required (modern switches use Auto-MDIX).

Answer

Use a crossover cable to connect the router directly to the WAP.

Answer

Use a hub between the router and the switch.

Answer

Configure the switch as a router to connect to the WAP.

Question 5

A company's network uses a managed switch with VLANs. Users in VLAN 10 can ping the default gateway but cannot communicate with users in VLAN 20. The switch is connected to a router that handles inter-VLAN routing. What is the most likely misconfiguration?

Accepted Answer

The switch port connecting to the router is configured as an access port instead of a trunk.. This question tests understanding of inter-VLAN routing and trunk ports. For a router to route between VLANs, the switch port connecting to the router must be configured as a trunk port, allowing multiple VLAN tags. If the port is an access port, only one VLAN's traffic will pass. The correct answer is that the switch port connecting to the router is configured as an access port instead of a trunk.

Answer

The router's firewall is blocking traffic between VLANs.

Answer

The default gateway for VLAN 20 is misconfigured.

Answer

The switch has Spanning Tree Protocol enabled, blocking the link.

Question 6

A user reports that their laptop can connect to the internet when using a wired connection at home, but cannot connect to any network resources when using Wi-Fi at the office. The office uses DHCP with a scope of 192.168.10.0/24. The laptop's IP configuration shows an address of 169.254.15.22. What is the most likely cause of this issue?

Accepted Answer

The laptop cannot reach the DHCP server on the office network.. The address 169.254.x.x is an Automatic Private IP Addressing (APIPA) address, assigned when a DHCP server is unreachable. This indicates the laptop failed to obtain a valid IP from the office DHCP server, likely due to a connectivity or server issue.

Answer

The laptop's Wi-Fi adapter is disabled in Device Manager.

Answer

The office DHCP server is out of available IP addresses.

Answer

The laptop's DNS settings are misconfigured.

Question 7

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 falls within the router's DHCP scope, which typically includes 192.168.1.2 to 192.168.1.254 unless modified. This can cause an IP conflict if the router assigns that address to another device.

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 8

A technician is setting up a new server that must always have the same IP address on a network using DHCP. The network administrator wants to avoid manually configuring the server's IP to prevent misconfiguration. Which method should be used to ensure the server receives the same IP from the DHCP server?

Accepted Answer

Configure a DHCP reservation on the router for the server's MAC address.. A DHCP reservation ties a specific MAC address to a specific IP address in the DHCP server's configuration. This ensures the server always gets the same IP without manual static configuration.

Answer

Set the server to use a static IP address outside the DHCP scope.

Answer

Set the server's IP address to 169.254.x.x.

Answer

Disable the server's network adapter and re-enable it.

Question 9

A user complains that they cannot access a website by its domain name, but they can access it by typing the IP address directly. The user's computer is configured to obtain DNS automatically. What is the most likely issue?

Accepted Answer

The DNS server is not responding or is misconfigured.. When a user can access a site by IP but not by domain name, it indicates a DNS resolution problem. The DNS server may be unreachable or not configured correctly.

Answer

The user's computer has a static IP address that conflicts with another device.

Answer

The user's browser cache is corrupted.

Answer

The website's IP address has changed.

Question 10

A technician is troubleshooting a network where several users cannot access the internet, but they can communicate with each other. The network uses a router with IP 10.0.0.1 and a subnet mask of 255.255.255.0. All computers have IPs in the 10.0.0.0/24 range. What is the most likely cause?

Accepted Answer

The default gateway on the computers is not set to 10.0.0.1.. If users can communicate locally but not access the internet, the issue is likely with the default gateway. The gateway must be correctly configured on each device and the router must have a route to the internet.

Answer

The DNS server address is set to 10.0.0.1.

Answer

The subnet mask is incorrectly set to 255.255.0.0 on some computers.

Answer

The router's DHCP server is disabled.

Question 11

A company has a network with the IP range 172.16.0.0/16. They need to create 8 separate subnets for different departments, each with at least 1000 usable hosts. What subnet mask should be used?

Accepted Answer

255.255.224.0. To create 8 subnets from a /16 network, you need to borrow 3 bits (2^3=8 subnets). This gives a /19 subnet mask (255.255.224.0), which provides 8190 usable hosts per subnet (2^13-2), meeting the requirement of at least 1000 hosts.

Answer

255.255.240.0

Answer

255.255.248.0

Answer

255.255.192.0

Question 12

A technician is configuring a small office network with 15 computers and a single router. The router's WAN port is connected to a cable modem, and the LAN port is connected to a switch. All computers are connected to the switch. The technician assigns the router's LAN interface the IP 192.168.0.1/24. What should be the default gateway setting on each computer?

Accepted Answer

192.168.0.1. The default gateway is the IP address of the router's LAN interface, which is 192.168.0.1. This allows computers to send traffic outside their local subnet, such as to the internet.

Answer

The IP address of the cable modem.

Answer

The IP address of the switch.

Answer

192.168.0.255

Question 13

A user reports that they can only access the internet intermittently. The technician runs ipconfig and sees an IPv4 address of 192.168.1.105 with a subnet mask of 255.255.255.0 and a default gateway of 192.168.1.1. The technician pings the gateway successfully, but pings to 8.8.8.8 fail. What is the most likely issue?

Accepted Answer

The router's WAN connection is down or misconfigured.. Successful ping to the gateway indicates local network connectivity is fine. Failure to ping an external IP like 8.8.8.8 suggests the router is not forwarding traffic to the internet, possibly due to a WAN configuration issue or ISP problem.

Answer

The user's computer has a duplicate IP address.

Answer

The DNS server is not resolving addresses.

Answer

The user's firewall is blocking ICMP traffic.

Question 14

A network administrator is designing a new subnet scheme for a company with 4 departments: Sales (50 devices), HR (25 devices), IT (10 devices), and Management (5 devices). The company uses the 10.0.0.0/8 network. To minimize wasted IP addresses, which subnet mask should be used for the Sales department?

Accepted Answer

255.255.255.192. To accommodate 50 devices, you need at least 52 usable addresses (50 + 2 for network and broadcast). A /26 subnet mask (255.255.255.192) provides 62 usable hosts, which is the smallest subnet that can support 50 devices without wasting many addresses.

Answer

255.255.255.0

Answer

255.255.255.224

Answer

255.255.255.240

Question 15

A technician is troubleshooting a network where two computers cannot communicate. Computer A has an IP of 192.168.1.10 with subnet mask 255.255.255.0. Computer B has an IP of 192.168.2.20 with subnet mask 255.255.255.0. Both are connected to the same switch. The switch is not configured with VLANs. Why can't the computers communicate?

Accepted Answer

The computers are on different subnets and need a router to communicate.. Even though both computers are on the same physical switch, they are on different logical subnets (192.168.1.0/24 and 192.168.2.0/24). Without a router to forward traffic between subnets, they cannot communicate directly.

Answer

The switch is blocking the traffic due to MAC address filtering.

Answer

The subnet mask on Computer B is incorrect.

Answer

The default gateway on both computers is not set.