What is IPsec? | How IPsec VPNs work
IPsec, short for Internet Protocol Security, is a suite of protocols designed to ensure the integrity, confidentiality, and authentication of data communications over an Internet Protocol (IP) network. IPsec is used to secure the exchange of data between two hosts, between a host and a network, or between two networks. It operates at the network layer of the OSI model, allowing it to secure IP packets exchanged between devices.