Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 73

Which two statement about GRE tunnel interface are true? (Choose two.)

Answer options

• 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 BD

Correct answer:

Explanation

The correct answers are B and D. Option B is true because a routable destination can be unreachable, and option D is correct since the source interface must be in an up/up state to successfully establish a tunnel. Options A, C, and E are incorrect as they either misstate the requirements for the source interface or the nature of the tunnel destination.