A VPN is a private network that uses a public network (usually the Internet) to connect remote sites or users together. Instead of using a dedicated, real-world connection such as leased line, a VPN uses “virtual” connections routed through the Internet from the company’s private network to the remote site or employee.

h3. h2. Origin of VPNs

Since many businesses and organizations now have to think about large facilities that may be spread out across the country or around the world, they need a way to maintain fast, secure and reliable communications wherever their offices are. Before VPNs, this meant the use of leased lines to maintain a wide area network ([[WAN]]). Leased lines, ranging from [[ISDN]] (integrated services digital network, 128 Kbps) to OC3 (Optical Carrier-3, 155 Mbps) fiber, provided a company with a way to expand its private network beyond its immediate geographic area. A WAN has obvious advantages over a public network like the Internet when it comes to reliability, performance and security. But maintaining a WAN, particularly when using leased lines, can become quite expensive and often rises in cost as the distance between the offices increases.

As the popularity of the Internet grew, businesses turned to it as a means of extending their own networks. First came intranets, which are private networks designed for an internal organization's use. After that, the VPN came into use to accommodate the needs of remote employees and distant offices, so that they could remotely access a private intranet.

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A VPN is How Virtual Private Networks Work?

The world has changed a private network that uses a public network (usually lot in the Internet) to connect remote sites or users together. last couple of decades. Instead of using a dedicated, real-world connection such as leased line, a VPN uses “virtual” connections routed through the Internet from the company’s private network to the remote site simply dealing with local or employee.

h2. Origin of VPNs

Since regional concerns, many businesses and organizations now have to think about large global markets and logistics. Many companies have facilities that may be spread out across the country or around the world, they need a and there is one thing that all of them need: A way to maintain fast, secure and reliable communications wherever their offices are. Before VPNs, Until fairly recently, this has meant the use of leased lines to maintain a wide area network ([[WAN]]). (WAN). Leased lines, ranging from [[ISDN]] ISDN (integrated services digital network, 128 Kbps) to OC3 (Optical Carrier-3, 155 Mbps) fiber, provided a company with a way to expand its private network beyond its immediate geographic area. A WAN has had obvious advantages over a public network like the Internet when it comes came to reliability, performance and security. But maintaining a WAN, particularly when using leased lines, can become quite expensive and often rises in cost as the distance between the offices increases.

As the popularity of the Internet grew, businesses turned to it as a means of extending their own networks. First came intranets, which are private networks password-protected sites designed for an internal organization's use. After that, the use only by company employees. Now, many companies are creating their own VPN came into use (virtual private network) to accommodate the needs of remote employees and distant offices, so offices.

Basically, a VPN is a private network that they could remotely access uses a public network (usually the Internet) to connect remote sites or users together. Instead of using a dedicated, real-world connection such as leased line, a VPN uses “virtual” connections routed through the Internet from the company’s private intranet. network to the remote site or employee. In this article, you will gain a fundamental understanding of VPNs, and learn about basic VPN components, technologies, tunneling and security.

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