VPN

private communications network that is based on the public network (uses information security and channeling protocol in order to maintain security of information transferred over the general network

A virtual private network (VPN) is a communications network  tunneled through another network, and dedicated for a specific network. One common application is secure communications through the public Internet, but a VPN need not have explicit security features, such as authentication or content encryption. VPNs, for example, can be used to separate the traffic of different user communities over an underlying network with strong security features.
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Virtual Private Network

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= virtual private network (VPN).
Ex: The concept of virtual private networks (VPNs) provides an economical and efficient solution on communicating private information securely over public network infrastructure.