A Survey of VPN Performance Evaluation

Virtual Private Network (VPN) is commonly used in business situations to provide secure communication channels over public infrastructure such as Internet. A VPN operates by passing data over the Internet or corporate intranet through ?tunnels? which are secure, encrypted virtual connections that use the Internet as the connection medium[13].The VPN establishes tunnels between servers in a site-to-site VPN, clients and servers in a client-to site VPN[13]. VPN is a technology that does provide security strong enough for business use. However, performance of these networks is also important in that lowering network and server resources can lower costs and improve user satisfaction.VPN have many protocols PPTP, L2TP, IPSec for the performance and security. In this research we evaluate performance of VPN using IPSec (Internet Protocol Security). IPSec is a framework for a set of protocols and algorithms for security at the network layer by authenticating and encrypting each packet between two IPSec gateways (GWs).So IPSec protocol is better than the other protocol it give better performance than the other protocol