A virtual private network (VPN) is a network arrangement that extends a private network and usually the resources that are included in the network through public networks such as the Web. This is what allows a host terminal or computer to send out and receive data throughout a public or even shared network. It acts as if the connections and various configurations were exclusive with all aspects of security, functionality and of course management policies part of the network. This is typically done by establishing a point-to-point connection through the use of truly dedicated connections, file encryption or a mix or the two.
Virtual private network connections across the Internet are technically WANs (wide area networks). This is really what links networks at various sites but for the end user, the entire arrangement appears as if it was a private link. This is what creates the name VPN.
In that case, therefore, you could choose to define a virtual private network as a network technology which creates secure network connections over public networks like the Internet or private networks that are the property of specific providers. Business corporations, government agencies and universities make use of VPN technology to enable remote employees, teachers and students to successfully and securely connect to a private network.
You could make use of a virtual private network to connect different sites over very large distances just like the case is for WANs. VPNs are normally used for purposes of prolonging Intranets across the globe as well as to disseminate information and files to a broad consumer base. Many educational institutions make use of this technology for purposes of connecting campuses that can be distributed throughout the country as well as across the globe.
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For a user to be able to gain access to a private network, they ought to be properly authenticated. This can be done using passwords and special identifiers. Most of these networks utilize authentication tokens in order to get access to the private networks one wants to get files from.
VPN is only a successor of leased line arrangements in as far as remote connections are concerned. In the very recent past, leased lines such as ISDN were essentially private connections that telecommunications companies could easily lease to clients. These leased lines also provided businesses different means through which they could expand their private networks past the constraints of geographic locations. These are the connections that form WANs. In as much leased lines are secure, they are a bit expensive. That’s why virtual private network technology is the very best option here. Virtual private network technology is a very affordable solution and is now used by thousands and thousands of users worldwide.
This article was written by an Internet security expert. If you are looking for a reputable virtual private network solution, make sure you read his unbiased review of VPN4All.