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VPN(Virtual Private Network) :-
| The Virtual Private Network - VPN - has attracted the attention of many organizations looking to both expand their networking capabilities and reduce their costs. |
| A VPN supplies network connectivity over a possibly long physical distance. In this respect, a VPN is a form of Wide Area Network (WAN). The key feature of a VPN, however, is its ability to use public networks like the Internet rather than rely on private leased lines. VPN technologies implement restricted-access networks that utilize the same cabling and routers as a public network, and they do so without sacrificing features or basic security. |  |
| (i).Remote access client connections. (ii).LAN-to-LAN internetworking. (iii).Controlled access within an intranet. |
| Virtual private networks have grown in popularity as businesses to save money on remote network access for employees. Many corporations have also adopted VPNs as a security solution for private Wi-Fi wireless networks. Expect a continued gradual expansion in use of VPN technology to continue in the coming years. A VPN supplies network connectivity over a possibly long physical distance. In this respect, a VPN is a form of Wide Area Network (WAN). VPNs enable file sharing, video conferencing and similar network services. Virtual private networks generally don't provide any new functionality that isn't already offered through alternative mechanisms, but a VPN implements those services more efficiently / cheaply in most cases. A key feature of a VPN is its ability to work over both private networks as well as public networks like the Internet. Using a method called tunneling, a VPN use the same hardware infrastructure as existing Internet or intranet links. VPN technologies includes various security mechanisms to protect the virtual, private connections. |
| Cost Savings with a VPN. A VPN can save organization money in several situations: (i).eliminating the need for expensive long-distance leased lines. (ii).reducing long-distance telephone charges. (iii).offloading support costs. VPNs vs leased lines- Organizations historically needed to rent network capacity such as T1 lines to achieve full, secured connectivity between their office locations. With a VPN, you use public network infrastructure including the Internet to make these connections and tap into that virtual network through much cheaper localleased lines or even just broadband connections to a nearby Internet Service Provider (ISP). Long distance phone charges- A VPN also can replace remote access servers and long-distance dialup network connections commonly used in the past by business travelers needing to access to their company intranet. For example, with an Internet VPN, clients need only connect to the nearest service provider's access point that is usually local. Support costs- With VPNs, the cost of maintaining servers tends to be less than other approaches because organizations can outsource the needed support from professional third-party service providers. These provides enjoy a much lower cost structure through economy of scale by servicing many business clients. |
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