Cabecera IP que proporciona el servicio de
autenticación de un paquete IP que viaje por la red.
(I) An Internet protocol
[R2402, R4302] designed to provide connectionless data integrity service and
connectionless data origin authentication service for IP datagrams, and
(optionally) to provide partial sequence integrity and protection against
replay attacks. (See: IPsec. Compare: ESP.) [RFC4949:2007]
The IP Authentication Header
(AH) is used to provide connectionless integrity and data origin authentication
for IP datagrams (hereafter referred to as just "integrity") and to
provide protection against replays.
http://www.ietf.org/rfc/rfc4302