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