JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2023) — Question 29

What is considered a requirement for passing traffic through GRE tunnels?

Answer options

• A. Tunnel endpoints must have static routes pointing to the remote endpoints.
• B. You must configure the tunnel on the physical interface connecting to the remote endpoint.
• C. You must be able to reach the remote endpoint through the tunnel.
• D. Tunnel endpoints must have a route that directs traffic into the tunnel.

Correct answer: C

Explanation

To successfully pass traffic through GRE tunnels, it is essential to reach the remote endpoint via the tunnel itself, which is why option C is correct. Options A and D relate to routing but do not ensure the ability to reach the endpoint through the tunnel, and option B incorrectly suggests that configuration must be done on the physical interface, which is not a requirement for GRE tunnels.