2V0-41.24 Question 168
Single answerA company is transitioning its internal network to IPv6 but still needs to communicate with external systems reliant on IPv4. The network administrator decides to use NAT64. How does NAT64 facilitate communication between these two networks?
- A
It translates IPv6 packets into IPv4 packets by mapping IPv6 addresses to IPv4 addresses dynamically.
- B
It allows direct communication between IPv6 and IPv4 devices without any translation.
- C
It requires dual-stack implementation to function properly.
- D
It uses a combination of DNS64 and protocol translation to enable communication.
Show answer and explanation
Correct answer: D
Explanation
NAT64 facilitates communication between IPv6 and IPv4 networks by translating IPv6 packets into IPv4 packets and vice versa. It works alongside DNS64, which synthesizes AAAA records for IPv4-only destinations to ensure IPv6-only clients can resolve them. This combination allows seamless communication without requiring dual-stack configurations.
- A. Incorrect.
This is incorrect because, while NAT64 translates packets, it does not simply map IPv6 addresses to IPv4 addresses dynamically. It also involves protocol translation.
- B. Incorrect.
This is incorrect because IPv6 and IPv4 are inherently incompatible without a translation mechanism like NAT64.
- C. Incorrect.
This is incorrect because NAT64 does not require dual-stack implementation; it works by translating between IPv6 and IPv4, enabling communication for single-stack IPv6 systems.
- D. Correct.
This is correct because NAT64 works in conjunction with DNS64 to enable IPv6-only clients to resolve and communicate with IPv4-only servers by performing both DNS resolution and protocol translation.