Refer to the Exhibit

Multiple Choice

Refer to the exhibit. An engineer wants to authenticate the OSPF neighbor between PE-A and PE-B using MD5. Which command on PE-B successfully completes the configuration?

A) PE-B(config-if) #ip ospf message-digest-key 1 md5 44578611 PE-B(config-if) #ip ospf authentication null
B) PE-B(config-if) #ip ospf authentication key-chain 44578611
C) PE-B(config-if) #ip ospf message-digest-key 1 md5 44568611
D) PE-B(config-if) #ip ospf authentication message-digest