Question

Which IPSec subprotocol provides data encryption?

1. AES
2. ESP
3. AH
4. SSL

Answer 1

The subprotocol of IPsec that provides data encryption is ESP (Encapsulating Security Payload). AES is an encryption algorithm used by ESP, not a subprotocol itself. SSL is unrelated to IPsec and is its own separate protocol for data transfer security.

Step-by-step explanation:

The IPsec subprotocol that provides data encryption is the Encapsulating Security Payload (ESP). ESP is designed to provide a mix of security services in IPv4 and IPv6. ESP can be used alone or in combination with the Authentication Header (AH), to provide data confidentiality, connectionless integrity, and an anti-replay service. AES (Advanced Encryption Standard) is an encryption algorithm that can be used by ESP to encrypt the data. SSL (Secure Sockets Layer) is a separate protocol used for securing data transfers on the internet and is not part of IPsec.