IPSec authentication header supports all the following except?
A. Connectionless data integrity
B. Data confidentiality
C. Data authentication
D. Protection against replay attacks
Answer: B
Explanation: Authentication header (AH) modifies IP datagrams by adding an attribute field, which enables receivers to check the authenticity of the data. It supports connectionless data integrity, data authentication, and protection against replay attacks. It does not support confidentiality. Confidentiality is supported by ESP.
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