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350-501 Networking Practice Question

An SP is deploying NAT64 to allow IPv6-only clients to access IPv4 servers. Which address translation mechanism is used by NAT64 to map IPv6 addresses to IPv4 addresses?

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Embedding IPv4 addresses in IPv6 addresses using a predefined prefix

NAT64 uses a well-known prefix (64:ff9b::/96) to embed IPv4 addresses into IPv6 addresses. The IPv4 address is appended to the prefix, creating an IPv6 address that represents the IPv4 destination.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✓

    Embedding IPv4 addresses in IPv6 addresses using a predefined prefix

    Why this is correct

    Correct. NAT64 uses a prefix (64:ff9b::/96) to embed IPv4 addresses.

  • ✗

    IPv6-over-IPv4 tunneling

    Why it's wrong here

    Tunneling is used in 6to4 or 6rd, not NAT64.

  • ✗

    DNS64

    Why it's wrong here

    DNS64 is used to synthesize AAAA records from A records, but it is not the address translation mechanism itself.

  • ✗

    Stateful translation of IPv6 to IPv4 using a pool of IPv4 addresses

    Why it's wrong here

    Stateful NAT64 does use a pool, but the question asks about address mapping; the mechanism is embedding.

About these practice questions

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JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This 350-501 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-501 exam.