JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2025) — Question 19

Which statement is correct about IP-IP tunnels?

Answer options

• A. IP-IP tunnels only support encapsulating IP traffic.
• B. IP-IP tunnels only support encapsulating non-IP traffic.
• C. The TTL in the inner packet is decremented during transit to the tunnel endpoint.
• D. There are 24 bytes of overhead with IP-IP encapsulation.

Correct answer: A

Explanation

The correct answer is A because IP-IP tunnels are specifically designed to encapsulate IP packets, allowing them to be transported over different network architectures. Option B is incorrect as it misrepresents the purpose of IP-IP tunnels, and options C and D are unrelated to the fundamental function of IP-IP tunnels.