What Are VPNs?
VPNs mean different things to different people. Some people claim that leased lines using Frame Relay connecting their offices is a VPN. It's virtual because the offices are not really connected with a single cable, but rather through a service provider's switched network. It's definitely a network, which the company uses to share data, but is it private? Many people have different minds on the subnet. Some people claim that the provider's switched network is secure and that data cannot be compromised even though it is sent in cleartext. Others claim that “If there is a will, there is a way,” and that if someone wants the data bad enough, he can obtain it off the provider's equipment.
What we want in a VPN is exactly what the acronym ...
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