AH - Authentication Header is used in what industry standard protocol?

SSL (Secure Sockets Layer) is a protocol for securing communication over a computer network, operating at the transport layer, and does not use AH.

ESP (Encapsulating Security Payload) is another primary protocol within the IPsec suite, providing confidentiality in addition to authentication and integrity, but it is not the protocol *using* AH; AH is a separate IPsec protocol.

ISAKMP (Internet Security Association and Key Management Protocol) is a framework used for establishing security associations and cryptographic keys, often used *with* IPsec but is not the protocol that incorporates AH.

IKE (Internet Key Exchange) is a protocol used to set up a Security Association (SA) in the IPsec suite, but it is a key management protocol, not the protocol that directly uses AH for data authentication.

The Authentication Header (AH) is one of the two primary protocols that comprise the IPsec (Internet Protocol Security) suite, providing data integrity and authentication services for IP packets.