What are three reasons an OSPF neighbor ship would be stuck in ExStart? (Choose three.)
A.
The LSA database exchange is not yet completed.
B.
There is an MTU mismatch between the OSPF routers.
C.
There is an interface-type mismatch between the OSPF routers.
D.
There is a unicast communication problem between the OSPF routers.
E.
Both OSPF routers are using the same router ID.
Explanation: