Based on this judgment, which of the following reasons may cause the adjacency relationship to fail to be established normally?

As shown in the figure is the output information of a network engineer when troubleshooting OSPF faults.

Based on this judgment, which of the following reasons may cause the adjacency relationship to fail to be established normally?
A . Hello message sending intervals are inconsistent
B . Authentication passwords are inconsistent
C . The IP address masks of the interfaces are inconsistent
D . Inconsistent area types

View Answer

Answer: C