VPN - Virtual Private Network
(MIT1030 -Fundamental of Information Technology (FIT))
VPN is a technology which is making secure private network through the public accessible network infrastructure.
Virtual Private Network represent by the short name VPN.
Earlier if we want to connect two location for data communication we have to have separate connectivity to connect two locations. the solution is costly.
Internet is a public communication channel which can be access to anyone. Establish a communication channel for above two locaiton over the internet is a cheap solution. But using public channel is making a security thread. as a solution to this security issue the VPN was arise.
VPN is making a secure encrypted channel for establish a secure private network.
while using the public shared communication like internet its maintaining privacy through security procedures and tunneling protocols such as the Layer Two Tunneling Protocol (L2TP). In effect, the protocols, by encrypting data at the sending end and decrypting it at the receiving end, send the data through a "tunnel" properly encrypted. An additional level of security involves encrypting not only the data, but also the originating and receiving network addresses.
It can provide the same IP range for source and the destination location. then it makes a one wide area network.
ADVANTAGES
- Two different location can be connected to work as a single network.
- Secure data transfer using encrypted channel.
- Low cost due to private network over the public internet.
- Eliminating expensive long-distance leased lines.
- Reducing long-distance telephone charges using VOIP solution over the VPN.