300-420 · Question #238
300-420 Question #238: Real Exam Question with Answer & Explanation
The correct answer is D: stateful NAT64. To provide internet connectivity for an IPv6 corporate network by translating to IPv4 internet resources, stateful NAT64 is the correct address translation solution.
Question
Refer to the exhibit. An engineer must design an address translation solution to provide internet connectivity for the corporate network. The design is restricted to the 172.16.168.0/22 subnet. Which solution must the engineer choose?
Options
- Astateful NAT66
- Bstateless NAT64
- Cstateless NAT66
- Dstateful NAT64
Explanation
To provide internet connectivity for an IPv6 corporate network by translating to IPv4 internet resources, stateful NAT64 is the correct address translation solution.
Common mistakes.
- A. Stateful NAT66 is used for IPv6-to-IPv6 translation, typically for address hiding or renumbering, not for connecting an IPv6 network to the IPv4 internet.
- B. Stateless NAT64 does not maintain session state, making it generally unsuitable for robust outbound internet connectivity where many internal hosts share a limited pool of external IPv4 addresses.
- C. Stateless NAT66 is for IPv6-to-IPv6 translation and does not provide connectivity to the IPv4 internet.
Concept tested. IPv6 to IPv4 translation (NAT64) for internet access
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