What security does IPsec?

Recognized as the most secure method for communicating to remote private networks over the Internet , the IPSec standard provides robust authentication and encryption of IP packets at the network layer of the OSI model.

IPsec uses cryptographic security services to protect communications over Internet Protocol (IP) networks. It supports network-level peer authentication, data origin authentication, data integrity, data confidentiality (encryption), and replay protection .

The last three topics cover the three main IPsec protocols: IPsec Authentication Header (AH), IPsec Encapsulating Security Payload (ESP), and the IPsec Internet Key Exchange (IKE) . for both IPv4 and IPv6 networks, and operation in both versions is similar.

Three security services that can be provided by IPSec are: message confidentiality , message integrity and traffic analysis protection. Briefly explain the type of mechanism used to provide each of these services. c. Briefly describe the three major VPN architectures supported by IPSec.