FCSS – Network Security Specialist 7.4 — Question 26

The local OSPF router is unable to establish adjacency with a peer.
Which two things should the administrator do to troubleshoot the issue? (Choose two.)

Answer options

• A. Check whether TCP port 179 is blocked.
• B. Check if there is an active static route to the peer.
• C. Check whether both peers have an IP address within the same subnet.
• D. Check if IP protocol 89 is blocked.

Correct answer: C, D

Explanation

The correct answers, C and D, are essential for OSPF adjacency since both peers must be in the same subnet to communicate properly, and IP protocol 89 is necessary for OSPF traffic. Options A and B are irrelevant because OSPF does not use TCP port 179 for adjacency formation, and static routes do not affect OSPF peer relationships directly.