There are two fundamental security protocols in IPSEc. These are the

Authentication Header (AH) and the Encapsulating Security Payload
(ESP). Which of the following correctly describes the functions of each?

A.
ESP-data encrypting and source authenticating protocol that also
validates the integrity of the transmitted data; AH-source
authenticating protocol

B.
ESP-data encrypting and source authenticating protocol; AH-source
authenticating protocol that also validates the integrity of the
transmitted data

C.
ESP-data encrypting protocol that also validates the integrity of the
transmitted data; AH-source authenticating protocol that also
validates the integrity of the transmitted data

D.
ESP-data encrypting and source authenticating protocol that also validates the integrity of the
transmitted data; AH-source authenticating protocol that also validates the integrity of the
transmitted data

Explanation:
ESP does have a source authentication and integrity capability through the use of a hash
algorithm and a secret key. It provides confidentiality by means of secret key cryptography. DES
and triple DES secret key block ciphers are supported by IPSEC and other algorithms will also be
supported in the future. AH uses a hash algorithm
in the packet header to authenticate the sender and validate the integrity of the transmitted data.