This document describes an updated version of the "Security Architecture for IP", which is designed to provide security services for traffic at the IP layer. This document obsoletes RFC 2401 (November 1998). [STANDARDS-TRACK]| IETF Datatracker
This memo specifies the incorporation of ECN (Explicit Congestion Notification) to TCP and IP, including ECN's use of two bits in the IP header. [STANDARDS-TRACK]| IETF Datatracker
This document specifies version 6 of the Internet Protocol (IPv6). It obsoletes RFC 2460.| IETF Datatracker