What is the size of the AH in bits with respect to width?

What is the size of the AH in bits with respect to width?
A . 24
B . 43
C . 16
D . 32

View Answer

Answer: D

Explanation:

The Authentication Header (AH) in the context of IPsec has a fixed header portion of 24 bits and a

mutable part that can vary, but when considering the fixed structure of the AH itself, the width is

typically considered to be 32 bits at its core structure for basic operations in providing integrity and

authentication, without confidentiality.

Reference: RFC 4302, "IP Authentication Header".