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In tunnel mode, IPSec protects the ______

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In tunnel mode, IPSec protects the ______

(a) Entire IP packet

(b) IP header

(c) IP payload

(d) IP trailer

The question was asked by my college director while I was bunking the class.

I need to ask this question from Security In The Internet topic in section Networking of Computer Network

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Correct choice is (a) Entire IP packet

For explanation: In the tunnel mode, IPSec adds control bits into the packets to encrypt the entire packet between the IPSec endpoints. Using encryption, it provides secure communication between the two endpoints.

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