Dynamic NAT-PT Connects the IPv6 Island to IPv4 Services
Short answer
C Dynamic NAT-PT translates many IPv6 hosts to IPv4 addresses on demand, giving the IPv6 island outbound access to IPv4 file/DNS services.
Question
Key Takeaways
NAT-PT is the IPv6-to-IPv4 translation mechanism (unlike NAT66, which is IPv6-to-IPv6). Dynamic (pooled) NAT-PT suits many hosts reaching shared IPv4 services; static is for fixed one-to-one.
To let IPv6-only hosts reach IPv4 file servers and DNS, the engineer uses NAT-PT. Dynamic NAT-PT maps many IPv6 sources to a pool of IPv4 addresses as sessions start, which fits outbound host-to-service access better than a static one-to-one mapping.
Common mistake: Picking A/B (NAT66): NAT66 translates between IPv6 addresses, not IPv6 to IPv4, so it cannot bridge the IPv6 island to the IPv4 network. The translation type here is NAT-PT.
Expert Analysis
Why the Answer Is Correct
C is correct. NAT-PT is the IPv6/IPv4 translation mechanism, and dynamic NAT-PT draws from a pool so many IPv6 hosts can reach IPv4 services (file servers, DNS) as they initiate outbound sessions.
Why the Other Options Are Wrong
A and B (stateless/stateful NAT66) translate between IPv6 addresses only; they do not bridge IPv6 to IPv4, so they cannot give the island access to the IPv4 network. D (static NAT-PT) is a fixed one-to-one mapping, which does not scale to many hosts needing outbound access.
Community Comment Notes
The vote is C (86). The top comment states dynamic NAT-PT fits because the traffic is outbound from host to DNS/file services.
Community Votes
100% of anonymous learners picked answer C. Votes are pick records left by other test-takers — they are not the verified answer.
Discussion 3 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 3
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rickyarchi 👍 4 Answered CDynamic NAT-PT because the traffic is outbound from host to DNS only
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08511d4 👍 1 Answered BB assuming it should be stateful NAT64
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muffedtrims 👍 2 Answered CDynamic NAT-PT
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