11. Lab 300 CCNA

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Refer to the topology.

Your company has decided to connect the main office with three other remote branch offices using point-to-point serial links.

You are required to troubleshoot and resolve OSPF neighbor adjacency issues between the main office and the routers located in the remote branch offices.

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R1 does not form an OSPF neighbor adjacency with R2. Which option would fix the issue?

A. R1 ethernet0/1 is shutdown. Configure no shutdown command.

B. R1 ethernet0/1 configured with a non-default OSPF hello interval of 25; configure no ip

ospf hello-interval 25.

C. R2 ethernet0/1 and R3 ethernet0/0 are configured with a non-default OSPF hello interval of 25; configure no ip ospf hello-interval 25.

D. Enable OSPF for R1 ethernet0/1; configure ip ospf 1 area 0 command under ethernet0/1.

Answer: B

Explanation:

Looking at the configuration of R1, we see that R1 is configured with a hello interval of 25

on interface Ethernet 0/1 while R2 is left with the default of 10 (not configured).