单项选择题
What is the default authentication method on an OSPF interface?（）
A.A B.B C.C D.D
What are the three OSPF authentication methods supporte...
多项选择题
What are the three OSPF authentication methods supported on the ERX Edge Router?（）
A.A B.B C.C D.D E.E
Where is OSPF authentication configured on the ERX Edge...
Where is OSPF authentication configured on the ERX Edge Router?（）
During OSPF adjacency formation, in which state is a ro...
During OSPF adjacency formation, in which state is a router in when an OSPF hello packet has been sent but bi-directional communication has not been achieved?（）
