Comprehensive and Detailed 200 to 250 words of Explanation From HCIP Datacom Campus Network documents knowledge without any URL or Links:
In IPsec, bothAuthentication Header (AH)andEncapsulating Security Payload (ESP)are implemented as IP protocols and are identified by specificIP protocol numbersin the IP header. These protocol numbers allow receiving devices to determine how the packet payload should be processed.
The protocol number assigned toAH is 51. AH provides data origin authentication, data integrity, and anti-replay protection but does not offer encryption. When an IP packet contains AH, the protocol field in the IP header is set to 51 so that the receiver can correctly process the AH header.
The protocol number assigned toESP is 50. ESP provides data confidentiality through encryption and can also provide integrity and authentication. Packets protected by ESP use protocol number 50 in the IP header.
The other options are incorrect because protocol number6represents TCP and17represents UDP, which are transport-layer protocols rather than IPsec protocols. Protocol number57is unrelated to IPsec.
According to HCIP Datacom Campus Network documentation and standard IP protocol assignments, the correct protocol numbers are AH = 51 and ESP = 50, making option B the correct answer.
