Virtual Private Network or VPN is a term that you may not have heard of, but is becoming very common over the years. Instead of Virtual Private Network Guide simply dealing with local or regional branch, many companies today have facilities or businesses spread out across the country or around the world. In order for them to maintain a fast, secure and reliable communications, these companies are creating their own virtual private network to accommodate the needs of remote employees and distant offices.
VPN is an acronym for Virtual Private Network, is a private data network ( usually used within a company, or by several different companies or organizations ) which has a secure connection created over a public network by using tunneling-mode encryption and other security procedures. The tunneling-mode encryption and security procedures ensure that only authorized users can access the network and data cannot be intercepted.
VPN message traffic is carried on public networking infrastructure e.g. the Internet using standard (often insecure) protocols, or over a service provider’s network providing VPN service guarded by well-defined Service Level Agreement (SLA) between the VPN customer and the VPN service provider.
The main purpose of a VPN is to give the company the capabilities of having the same protected sharing of public resources for data as the private leased lines, but at a much lower cost by using the shared public infrastructure.