Which of the parameters in Hello messages exchanged between two OSPF neighbors must
be the same to keep the adjacency alive in OSPF? (Choose four.)
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A,C,D,F. Only in the same area ID routers become neighbors.
I have the same idea. ABCF
ACDF is the correct answer .
Area ID – Used for OSPF hierarchy; it must be configured even if there is only a single area. It must be the same on all adjacent routers.
Password – Used only for OSPF authentication
Hello Interval – The interval at which hello packets are sent; defaults to 10 seconds
Dead Interval – The time OSPF waits without receiving a hello packet to mark a neighbor down; defaults to 40 seconds