CCNA Practice Exam Test Sample – Question 287

Scenario:
———
Refer to the topology. Your company has connected the routers R1, R2, and R3 with serial links. R2 and R3 are connected to the switches SW1 and SW2, respectively. SW1
and SW2 are also connected to the routers R4 and R5.
The EIGRP routing protocol is configured.
You are required to troubleshoot and resolve the EIGRP issues between the various routers.
Use the appropriate show commands to troubleshoot the issues.
q287-q1

q287-q2

Router R6 does not form an EIGRP neighbor relationship correctly with router R1. What is the cause for this isconfiguration?

A. The K values mismatch.
B. The AS does not match.
C. The network command is missing.
D. The passive interface command is enabled.

All what you have to know for this question is that the correct answer is C (The network command is missing)

Correct Answer: C
Section: Troubleshooting

Explanation:
The link from R1 to R6 is shown below:
q287-a1

As you can see, they are both using e0/0. The IP addresses are in the 192.168.16.0 network:

q287-a2
q287-a3

But when we look at the EIGRP configuration, the “network 192.168.16.0” command is missing on R6.

q287-a4