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Exam 300-101 topic 2 question 524 discussion

Actual exam question from Cisco's 300-101
Question #: 524
Topic #: 2
[All 300-101 Questions]

What is a function of NPTv6?

  • A. It interferes with encryption of the full IP payload.
  • B. It maintains a per-node state.
  • C. It is checksum-neutral.
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Suggested Answer: D. It rewrites transport layer headers. 🗳️
RFC 6296 describes a stateless IPv6-to-IPv6 Network Prefix Translation (NPTv6) function, designed to provide address independence to the edge network. It is transport-agnostic with respect to transports that do not checksum the IP header, such as SCTP, and to transports that use the TCP/UDP/DCCP (Datagram
Congestion Control Protocol) pseudo-header and checksum NPTv6 provides a simple and compelling solution to meet the address-independence requirement in
IPv6. The address-independence benefit stems directly from the translation function of the network prefix translator. To avoid as many of the issues associated with NAPT44 as possible, NPTv6 is defined to include a two-way, checksum-neutral, algorithmic translation function, and nothing else.
Reference: http://tools.ietf.org/html/rfc6296
by diegonamaste at Feb. 20, 2020, 10:20 p.m.

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diegonamaste
5 years, 2 months ago
C. It is checksum-neutral.
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