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Virtual Private Network, pronounced as 3 letters. Computers connected by dedicated wires form a private network, while computers connected via public wires including the Internet are on a public network. VPN refers to a number of techniques to connect two or more computers over public wires, while maintaining privacy of data exchanged in the connection.

A VPN encrypts all data sent, and many VPNs use protocols other than TCP/IP. Many corporations require VPN for all employees or contractors entering their corporate networks from the outside, including both dialup and Internet connections.

This is inherently slower on any type of Internet connection, and over satellite can range from poor to unusable. Many VPNs also will not work with a Dynamic IP.

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