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.