单项选择题
A.A
B.B
C.C
D.D
单项选择题 Given the set of routers, each with an interface on the same multi-access network: Which router can never be a designated router on that multi-access network?()
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?()
单项选择题 What is the default authentication method on an OSPF interface?()