Discussion About VPN Techniques In Network Comunication

VPN is a trade-off plan of private network and public network.While satisfing the need of data transfer cheaply,it also satisfies the need of network's security.This plan is the substitution of special-line private network,and it also is one of the most widely applied techniques in network comunication currently.The dissertation explains the theories of tunnel tenichque and encryption technique of VPN,so that common people can know more about VPN technique.