Which option lists the IPSEC network layer protocol components as described in the source material?

• A. AH
• B. IKE
• C. IP payload compression (ipcomp)
• D. AH, IKE, IP payload compression (ipcomp)

Answer: (D)

IPsec at the network layer relies on a set of components that includes an integrity/authentication mechanism, a key-management protocol, and a payload compression option. The combination that lists AH, IKE, and IP payload compression (ipcomp) matches what the source material describes as the IPsec network-layer protocol components. AH provides data integrity and origin authentication for IP packets, IKE handles the negotiation of security associations and keys between peers, and ipcomp allows compressing IP payloads to save bandwidth. While ESP is another IPsec protocol used for confidentiality, the material describes the component set as AH, IKE, and ipcomp, so this option is the best fit.