Designing Cisco Enterprise Networks (ENSLD) — Question 103

A customer's environment includes hosts that support IPv6-only. Several of these hosts must communicate with a public web server that has only IPv4 domain name resolution. Which solution should the customer use in this environment?

Answer options

• A. utilize NAT64 to translate the addresses
• B. implement NAT44 at the edge of the customer network
• C. use 6to4 and a tunnel to translate the addresses
• D. implement 6PE to resolve hostname resolution

Correct answer: A

Explanation

The correct choice is A, as NAT64 allows IPv6-only hosts to communicate with IPv4 servers by translating the addresses. Option B, NAT44, is not applicable because it is designed for IPv4 to IPv4 communication. Option C, 6to4, is not the best fit for this scenario as it focuses on tunneling IPv6 traffic over IPv4 networks, which does not directly address the need for IPv6 to IPv4 translation. Option D, 6PE, is used for IPv6 routing over MPLS networks and does not resolve hostname issues.