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Exam 300-101 topic 1 question 62 discussion

Actual exam question from Cisco's 300-101
Question #: 62
Topic #: 1
[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.
  • D. It rewrites transport layer headers. C
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Suggested Answer: Explanation 🗳️
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

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Nouraaa
2 years, 1 month ago
Correct answer : C
upvoted 1 times
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