In which AH mode does not create a new IP header?

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Multiple Choice

In which AH mode does not create a new IP header?

Explanation:
In IPsec Authentication Header, the mode determines what portion of the packet gets encapsulated. In transport mode, the original IP header remains intact and the AH header protects the payload and upper-layer header, so no new IP header is created. In tunnel mode, the entire original packet is encapsulated inside a new IP datagram, which adds a new outer IP header. Since the question asks which AH mode does not create a new IP header, the correct choice is transport mode. (Remember, AH provides integrity and authentication, not confidentiality.)

In IPsec Authentication Header, the mode determines what portion of the packet gets encapsulated. In transport mode, the original IP header remains intact and the AH header protects the payload and upper-layer header, so no new IP header is created. In tunnel mode, the entire original packet is encapsulated inside a new IP datagram, which adds a new outer IP header. Since the question asks which AH mode does not create a new IP header, the correct choice is transport mode. (Remember, AH provides integrity and authentication, not confidentiality.)

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