One of your router’s OSPF adjacencies is down. What are three reasons for this adjacency
state change? (Choose Three)
A.
The authentication key on both routers matches.
B.
One of the physical interfaces has gone down.
C.
The controlling BFD session state has gone down.
D.
The OSPF hello value is the same on both routers.
E.
A filter has just been configured on one of the OSPF routers.