JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2025) — Question 23

Which two statements are correct about tunnels? (Choose two.)

Answer options

• A. BFD cannot be used to monitor tunnels.
• B. Tunnel endpoints must have a valid route to the remote tunnel endpoint.
• C. IP-IP tunnels are stateful.
• D. Tunnels add additional overhead to packet size.

Correct answer: B, D

Explanation

Option B is correct because tunnel endpoints require a valid route to connect effectively. Option D is also correct as tunnels typically introduce additional overhead due to encapsulation. Options A and C are incorrect since BFD can indeed be used to monitor tunnels, and IP-IP tunnels are generally stateless.