
100 ◾ IP Communications and Services for NGN
Encapsulating Security Payload header (see RFC2406) ◾
Destination Options header: applies to the final destination only ◾
Upper-Layer header ◾
e structure of the IPv6 Next Header field is therefore as in Figure 5.3.
e extension headers are processed by only the destination node, with the
exception of the hop-by-hop options header. e extension headers that are cur-
rently defined include the Hop-by-Hop Options; Routing; fragmentation; secu-
rity, which includes authentication (RFC 2402 and next header=51); and the
Encapsulating Security Payload (ESP, RFC 2406, and next header=50), and the
destinat