Internet Protocol Security IPsec is actually a suite pf protocols. Each protocol within the suite provides different functionality. Collective IPsec does everything except.

Internet Protocol Security IPsec is actually a suite pf protocols. Each protocol within the suite provides different functionality. Collective IPsec does everything except.
A . Protect the payload and the headers
B . Encrypt
C . Work at the Data Link Layer
D . Authenticate

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Answer: D