IPsec, also known as Internet Protocol Security, is a protocol suite that encrypts IP traffic before the packets are transferred from the source node to the destination. So, naturally, a question arises: what are packets? Well, let's see.
Packets are the basic unit of information in a network transmission. Networks that use TCP as their network protocol transfer data in IP packets. These IP packets have the source and destination address along with the data to be transferred. IPsec is a set of protocols that enable machines to establish mutual authentication between agents at the start of the IPsec session. They also help in the negotiation of cryptographic keys to use during the secure session. IPsec is a versatile suite of protocols and it supports multiple scenarios. IPsec can protect data flows between a pair of hosts (host-to-host), a pair of security...