Which acronym stands for a protocol suite used to secure IP communications by providing confidentiality, integrity, and authentication?

Which acronym stands for a protocol suite used to secure IP communications by providing confidentiality, integrity, and authentication?

• A. TLS
• B. SSH
• C. IPsec
• D. SSL

Answer: (C)

Using protection at the network layer requires a protocol that can guard IP packets as they traverse networks. IPsec is designed exactly for this role. It provides confidentiality by encrypting the payload, integrity by ensuring the data hasn’t been tampered with, and authentication by confirming who each party is. This combination is achieved through a suite of protocols within IPsec, notably ESP (Encapsulating Security Payload) for encryption and data integrity, and AH (Authentication Header) for integrity and authentication without encryption in some configurations. Key management and peer authentication are handled by IKE (Internet Key Exchange). In contrast, TLS and SSL secure communications at the application layer, protecting sessions between applications (like a web browser and a server), and SSH secures remote access and file transfers. These do not operate at the IP layer to protect every IP packet across a network path, which is why IPsec is the correct choice for securing IP communications broadly.

Using protection at the network layer requires a protocol that can guard IP packets as they traverse networks. IPsec is designed exactly for this role. It provides confidentiality by encrypting the payload, integrity by ensuring the data hasn’t been tampered with, and authentication by confirming who each party is. This combination is achieved through a suite of protocols within IPsec, notably ESP (Encapsulating Security Payload) for encryption and data integrity, and AH (Authentication Header) for integrity and authentication without encryption in some configurations. Key management and peer authentication are handled by IKE (Internet Key Exchange).

In contrast, TLS and SSL secure communications at the application layer, protecting sessions between applications (like a web browser and a server), and SSH secures remote access and file transfers. These do not operate at the IP layer to protect every IP packet across a network path, which is why IPsec is the correct choice for securing IP communications broadly.