Which of the following is a standard for security at the network or packet processing layer of network communications, rather than the application layer?

Correct option is E

IPsec (Internet Protocol Security) is a protocol suite that provides security at the network layer. It encrypts and authenticates IP packets, ensuring secure data communication over networks like the internet.
Important Key Points:
1. IPsec operates at the network layer of the OSI model, securing IP packets.
2. It includes encryption (ESP) and authentication (AH) for data protection.
3. Widely used in VPNs for secure data transmission.
Knowledge Booster:
· UDP (User Datagram Protocol): A transport layer protocol without built-in security.
· IP: Provides addressing and routing but lacks encryption or authentication.
· Ethernet: Operates at the data link layer for LAN communication.
· SPX: Used in Novell NetWare, but it is not a security protocol.