2V0-41.24 Question 169
Select 3An organization has a network environment where internal clients use IPv6, but one of their legacy applications only supports IPv4. To enable communication between the IPv6 clients and the IPv4 application server, the organization has implemented NAT64. Which of the following statements correctly describe how NAT64 facilitates communication in this scenario?
- A
NAT64 translates IPv6 packets into IPv4 packets and vice versa to enable communication between IPv6 clients and IPv4 servers.
- B
NAT64 requires DNS64 to resolve IPv6 addresses into IPv4 addresses for proper communication.
- C
NAT64 creates a direct IPv6-to-IPv4 tunnel for end-to-end communication without packet translation.
- D
NAT64 uses a configured IPv6 prefix to represent IPv4 addresses in the IPv6 address space.
- E
NAT64 supports both stateful and stateless translation modes depending on the deployment requirements.
Show answer and explanation
Correct answers: A, D, E
Explanation
NAT64 is a key technology that allows IPv6-only clients to communicate with IPv4-only servers by translating the packet headers between the two protocols. It uses a configured IPv6 prefix to represent IPv4 addresses and supports both stateful and stateless translation. While DNS64 is often deployed in conjunction with NAT64 to resolve domain names, it is not a mandatory component for NAT64's functionality. NAT64 does not establish tunnels but relies on packet translation to enable communication across different IP versions.
- A. Correct.
This is correct. NAT64 translates packets between IPv6 and IPv4, enabling communication between devices on different address families.
- B. Incorrect.
This is incorrect. While DNS64 is commonly used with NAT64 to resolve names, NAT64 itself does not depend on DNS64 to function. NAT64 operates at the network layer, performing address translation.
- C. Incorrect.
This is incorrect because NAT64 does not create direct tunnels. It specifically translates packets between IPv6 and IPv4 rather than establishing tunnels.
- D. Correct.
This is correct. NAT64 uses a specific IPv6 prefix (usually well-known or configured) to represent IPv4 addresses within the IPv6 address space, facilitating translation.
- E. Correct.
This is correct. NAT64 can operate in either stateful or stateless modes, depending on whether the environment requires dynamic or static mappings of IPv6-to-IPv4 addresses.