IPSEC protects the integrity of data in transit using which protocol?

IPSEC protects the integrity of data in transit using which protocol?

• A. MAC
• B. AH
• C. DNSSEC
• D. RsA

Answer: (B)

IPSEC (Internet Protocol Security) is a suite of protocols designed to secure internet protocol (IP) communications by authenticating and encrypting each IP packet in a communication session. Among its key components, the Authentication Header (AH) plays a crucial role in protecting the integrity of data in transit. AH is specifically designed to ensure data integrity, authenticity, and protection against replay attacks. It does so by adding a header to the IP packet that contains a cryptographic checksum of the data, which allows the receiving party to verify both the integrity of the packet and the identity of the sender. This means that if any part of the data is altered during transit, the checksum will not match, thereby indicating that the data has been compromised. In contrast, the other options do not serve as protocols specifically intended for the integrity of data in transit. For example, MAC (Message Authentication Code) is a technique used to verify both the integrity and authenticity of a message but is not a standalone protocol within the IPSEC framework. DNSSEC (Domain Name System Security Extensions) is used to secure information in DNS queries and responses but does not directly apply to IP data packets. RsA refers to a cryptographic algorithm rather than a protocol for protecting data during transit.

IPSEC (Internet Protocol Security) is a suite of protocols designed to secure internet protocol (IP) communications by authenticating and encrypting each IP packet in a communication session. Among its key components, the Authentication Header (AH) plays a crucial role in protecting the integrity of data in transit.

AH is specifically designed to ensure data integrity, authenticity, and protection against replay attacks. It does so by adding a header to the IP packet that contains a cryptographic checksum of the data, which allows the receiving party to verify both the integrity of the packet and the identity of the sender. This means that if any part of the data is altered during transit, the checksum will not match, thereby indicating that the data has been compromised.

In contrast, the other options do not serve as protocols specifically intended for the integrity of data in transit. For example, MAC (Message Authentication Code) is a technique used to verify both the integrity and authenticity of a message but is not a standalone protocol within the IPSEC framework. DNSSEC (Domain Name System Security Extensions) is used to secure information in DNS queries and responses but does not directly apply to IP data packets. RsA refers to a cryptographic algorithm rather than a protocol for protecting data during transit.