单项选择题
You are running OSPF between two ERX Edge Routers across an OC-12c link with HDLC encapsulation. How many designated routers are present for this link?（）
A.0 B.1 C.2 D.3
What is the default authentication method on an OSPF in...
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?（）
