單項選擇題

if all OSPF routers on a broadcast network have the same OSPF priority, which parameter is used to determine the new BDR at the time of a DR failure?（）

A.A
B.B
C.C
D.D

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單項選擇題

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?（）

A.RouterA
B.RouterB
C.RouterC
D.RouterD

單項選擇題

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