Which two statement about GRE tunnel interface are true?

ccnp-dump
ccnp-route-dump
ccnp-route

#1

Which two statement about GRE tunnel interface are true? (Choose two)
A. A tunnel can be established when a source the source interface is in the up/down state
B. A tunnel Destination must be Routable, but it can be unreachable
C. To establish a tunnel the source interface must be a loopback
D. To Establish a tunnel the source interface must be up/up state
E. A tunnel destination must be a physical interface that is on up/up state

Correct Answer: BD