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3.9 VPN
VPN is a new technology that rapidly developed in recent years with the extensive application of
Internet. It is for building a private dedicated network on a public network. 'Virtuality" mainly refers to
that the network is a logical network.
Two Basic Features of VPN:
Private: the resources of VPN are unavailable to unauthorized VPN users on the internet; VPN can
ensure and protect its internal information from external intrusion.
Virtual: the communication among VPN users is realized via public network which, meanwhile can
be used by unauthorized VPN users so that what VPN users obtained is only a logistic private
network. This public network is regarded as VPN Backbone.
