Your network consists of three OSPF routers as shown below:
R1 — R2 — R3
You run the show ospf neighbor command on R2. The output shows no data in the output for
OSPF neighbors.
Which three actions will troubleshoot the adjacency problem for Router R2? (Choose three.)
A.
Verify the physical and data link layer connectivity on Routers R1, R2, and R3.
B.
Look for incorrect settings for MTU on Routers R1 and R3.
C.
Look for mismatched configurations on Routers R1, R2, and R3 for IP subnet/mask, area
number, and area type.
D.
Verify Router R1 and R3 to see if they are stuck in 2-way state.
E.
Look for mismatched configurations on Routers R1, R2, and R3 for authentication, hello/dead
interval, and network type.
Explanation: