JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing — Question 34

Your network consists of multiple remote locations using both IPv4 and IPv6. You have an IPv4-based Internet connection at each site provided by different, local service providers. You are asked to ensure that the remote IPv6 networks are able to communicate.
What should you do?

Answer options

• A. Create GRE tunnels between the remote locations to connect the IPv6 networks.
• B. Create IPsec tunnels between the remote locations to connect the IPv6 networks.
• C. Create IP-IP tunnels between the remote locations to connect the IPv6 networks.
• D. Create MPLS tunnels between the remote locations to connect the IPv6 networks.

Correct answer: C

Explanation

The correct answer is C, as IP-IP tunneling allows for the encapsulation of IPv6 packets within IPv4 packets, enabling communication across an IPv4 infrastructure. GRE tunnels (A) can also be used for this purpose, but they are less efficient for only IPv6 traffic. IPsec tunnels (B) primarily focus on securing communications rather than facilitating IPv6 traffic over IPv4. MPLS tunnels (D) are used for traffic engineering and do not directly relate to IPv6 connectivity.