CCNA Practice Quiz: 200-125 Quiz 27

1. You are designing a routing solution for your organization. You want to improve routing efficiency by ensuring that routers save frequently used data link headers to encapsulate packets.

Which types of routing logic could you implement? (Choose two)

• Cisco express forwarding
• Fragment free
• Fast switching
• Process switching
• Store and forward

2. Which Cisco express forwarding mechanism maintains layer 2 information linked to a particular entry in the routing table, reducing the need to send ARP requests before forwarding packets?

• Cached frequently-used data link headers
• Cached frequently-used destination addresses
• Forwarding information base
• Adjacency tables

3. What is the default administrative distance for OSPF?

• 1
• 90
• 225
• 120
• 100
• 110
• 0
• 115

4. Which of the following symptoms indicate a layer 2 problem with the Serial0/1/1 interface?

• Interface status shows Serial0/1/1 is up, line protocol is up, ping succeeds, but a Telnet connection can't be established.
• Interface status shows Serial0/1/1 is administratively down, line protocol is down.
• Interface status shows Serial0/1/1 is up, line protocol is down.
• Interface status shows Serial0/1/1 is down, line protocol is down.
• Interface status shows Serial0/1/1 is up, line protocol is up, but ping fails.

5. Which of the following symptoms indicate a layer 1 problem with the Serial0/1/1 interface?

• Interface status shows Serial0/1/1 is up, line protocol is down.
• Interface status shows Serial0/1/1 is up, line protocol is up, but ping fails.
• Interface status shows Serial0/1/1 is up, line protocol is up, ping succeeds, but a Telnet connection can't be established.
• Interface status shows Serial0/1/1 is down, line protocol is down.
• Interface status shows Serial0/1/1 is administratively down, line protocol is down.

6. You are troubleshooting a basic serial connection on your router. The show interface serial 0/1/0 command shows the following information:



What should be your first step in troubleshooting the problem?

• See if you can ping the remote router.
• Check the cable connector on the router.
• Verify that the remote router has an IP address set.
• Verify that the encapsulation is correctly configured.
• See if you can establish a Telnet session with the remote router.

7. When attempting to make a Telnet connection to a remote router, the connection fails. You check the interface status on your local router and find the following:



You ping the remote router but that fails as well. At which layer of the OSI model does the problem originate?

• Layer 1
• Layer 3
• Layer 2
• Layer 7

8. You are troubleshooting a basic serial connection on your router. The show interface serial 0/1/0 command shows the following information:



What should be your first step in troubleshooting the problem?

• Verify that the encapsulation is correctly configured.
• See if you can establish a Telnet session with the remote router.
• Check the cable connector on the router.
• See if you can ping the remote router.
• Verify that the remote router has an IP address set.

9. IP traffic destined for a device configured with the address 10.10.34.4/24 is congesting the network. The network administrator issues a traceroute command from the local router and receives the output shown below:



What is the cause of the problem?

• The device with the address 10.10.34.4 is in the wrong subnet.
• The interface on the local router is administratively down.
• A loop exists between two of the routers.
• The routing table is missing a static route to 10.10.34.4.

10. You are working at the console of a new router. You want to check the configuration of a neighboring router called Sales5. You type telnet Sales5 at the router prompt and receive the following message:



What should you do?

• Configure an address of a DNS server for the router to contact.
• Enable ARP broadcast support on the router.
• Create a static route to the Sales5 router.
• Modify the access list on Sales5 to allow Telnet traffic.