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QuestionQ87

IPv6

What ordering of extension headers is followed by IPv6?

  • A Destination Options (first), Routing, IPv6 header, Hop-by-Hop, Fragment, Authentication, Encrypted Security Payload, Destination Options (second), followed by an Upper-layer header, indicating payload.
  • B Routing, Hop-by-Hop, Destination Options (first), Fragment, Authentication, Encrypted Security Payload, Destination Options (second), followed by an Upper- layer header, indicating payload.
  • C Fragment, Routing, Hop-by-Hop, Destination Options (first), Authentication, Encrypted Security Payload, Destination Options (second), followed by an Upper- layer header, indicating payload.
  • D IPv6 header, Hop-by-Hop, Destination Options (first), Routing, Fragment, Authentication, Encrypted Security Payload, Destination Options (second), followed
Explanation

RFC 8200 specifies the recommended order as IPv6, Hop-by-Hop Options, Destination Options for intermediate/routing destinations, Routing, Fragment, Authentication, Encapsulating Security Payload, Destination Options for the final destination, and finally the Upper-Layer header.

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