FCSS – Network Security Specialist 7.6 — Question 30

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

Correct answer: B, D

Explanation

Answer B is correct because OSPF requires that routers be in the same subnet to establish adjacency. Answer D is also correct since OSPF operates over IP protocol 89; if this protocol is blocked, adjacency cannot be formed. The other options are not relevant to OSPF adjacency issues.