A virtual private network is an extension of a private network that encompasses links across shared or public networks, like the Internet. It enables the transmission of data between two computers across a virtual shared network or via the public internet.

The benefits of VPN are :

•  Cost-effective as it reduces equipment investment as compared to traditional point-to-point links
•  Connects mobile users to their corporate network
•  Links remote offices to the enterprise network
•  Ability to share part of business information with suppliers, customers and other business partners via extranet
•  Scalable and flexible, allowing expansion in users at minimum increase in cost