Valid IPv6 Extension Headers

BDE

IPv6 extension headers are used to provide additional information to the packet header, beyond the basic IPv6 header. These extension headers are inserted between the IPv6 header and the upper-layer protocol header, such as TCP or UDP. The IPv6 extension headers are used to provide a variety of functions, including fragmentation, authentication, and hop-by-hop options.

The valid IPv6 extension headers are as follows:

A. Multicast Header: The Multicast header is used to support multicast group membership management. It is used to indicate the multicast group membership of a node and is only used in multicast traffic.

B. Authentication Header (AH): The Authentication Header is used to provide authentication and integrity protection for the packet. It is used to ensure that the packet has not been tampered with during transmission.

C. Autoconfiguration Options: Autoconfiguration options are used to automatically configure IPv6 addresses for hosts. These options are used in combination with the Neighbor Discovery Protocol (NDP) to automatically configure hosts with IPv6 addresses.

D. Fragment Header: The Fragment Header is used to support fragmentation of IPv6 packets. It is used to divide a large packet into smaller packets that can be transmitted over a network with a smaller Maximum Transmission Unit (MTU).

E. Hop-by-Hop Options: The Hop-by-Hop Options header is used to provide options that must be examined and processed by every node along the path of the packet. This header is used to support functions such as quality of service (QoS) and security.

Therefore, the valid IPv6 extension headers are the Authentication header (AH), Autoconfiguration options, and Hop-by-Hop Options header.