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








 

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

This question is in 300-101 Cisco Implementing Cisco IP Routing (ROUTE) Exam
For getting Cisco Certified Network Professional (CCNP) Routing and Switching Certificate




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