Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 181

OSPF is enabled on router A. You execute the following command on router A and receive the accompanying output:

RouterA#ping 224.0.0.5 repeat 1 -
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 224.0.0.5, timeout is 2 seconds:
Reply to request 0 from 10.100.100.1, 4 ms
10.100.100.1 is the IP address of a loopback interface on router A.
What can you conclude about router A?

Answer options

• A. Only the router A loopback interface is participating in the OSPF routing process.
• B. None of the router A interfaces are participating in the OSPF routing process.
• C. Router A is using the loopback interface IP address as its OSPF router ID.

Correct answer: A, O, S, P, F

Explanation

The correct answer is A because the output indicates that the loopback interface is responding, suggesting it is the only interface being utilized for OSPF. Option B is incorrect as the loopback is active, and option C is not necessarily true based on the information provided, as the router ID could be different.