Virtual private network

 Virtual private network

Abstract:

A virtual private network (VPN) provides end users with a way to privately access information on their network (example an intranet) over a public network  infrastructure such as internet.

A VPN is a connection that has the appearance and many of the advantages of a dedicated link but occurs over a shared network. Using a technique called “Tunneling”, data packets are transmitted across a public routed network, such as internet or other commercially available network in a private “Tunnel”, that simulates a point-to-point  connection. This approach enables network traffic from many sources to travel via separate tunnels across the same infrastructure.

VPN solutions can be built using multiple devices like routers, firewalls , and bandwidth managers or they can be implemented on an integrated VPN router that provides on board firewall and band width management capabilities . Integrating all VPN functions on a router reduces network complexity and total cost of ownership of the VPN solution.

The advantage of a VPN are less expensive to operate than private networks from management, band width and capital perspectives. Consequently, the payback period for VPN equipment is generally measured in months instead of years. Perhaps the most important benefit of all, however is that VPN enables enterprises to focus on their core business objectives instead of running the corporate network

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