Which command enable ospf authentication on an interface?

Which command enable ospf authentication on an interface?
A . ip ospf authentication message-digest
B . network 192.168.10.0 0.0.0.255 area 0
C . area 20 authentication message-digest
D . ip ospf message-digest-key 1 md5 CCNA

View Answer

Answer: A

Explanation:

https://supportforums.cisco.com/document/22961/ospf-authentication