IPsec is the most widely used VPN technology, because it provides protection at the IP level (Layer 3). It can be deployed to secure communication between a pair of gateways, a pair of host computers, or even between a gateway and a host computer. It offers security features that are required in the enterprise and service provider infrastructures. IPsec was designed to provide. » Data Integrity – to ensure that packets have not been modified during … Read entire article »