VPN – Virtual Private Network

What is VPN – Virtual Private Network

Virtual Private Network can be defined as a Tool or Software, which is used to connect to a specific Network by using the Internet.

Why VPN?

VPN is also used to connect two different networks, without a VPN it is quite impossible to connect to an isolated network which may be internet or intranet, with the help of VPN users can access the Remote systems like databases, printers and the devices which are connected to the Remote Network.

What is the importance of VPN?

• Sharing of Remote resources is possible via VPN.
• Connection to Isolated Network is easy.
• Much more Secured because the resources using the Network will be given with the login Credentials along with the Token which will be having the Secure Code which will vary from time to time.
• Employees can be able to access their company’s Intranet portal without which they can’t.
• With the Same VPN Maximum of two Systems can be used.
• Distinct Employees Can work together by connecting to a VPN.
• Business can be extended globally.

A VPN Can be Categorized based on the below conditions:

• Based on the protocols used by the VPN.
• Based on whether its offering Site to Site or Remote to remote Connectivity.
• Based on the Security its offering.
• Based on the type of the Network its dealing with.
• And also based on the type of the projects its dealing with.

How does VPN Works?

Consider an Example where a User wants to send the data or to share, the data with the remote user who is geographically at larger distance by using the VPN.

1. First user needs to connect to VPN by using his respective credentials where he will be considered as a client with a unique IP address which is given by the VPN server.
2. And the connection is established between the client and the server via Network Interface.
3. Once the VPN Connection is established between the VPN Client and the Server then the data transformation takes place which is explained in the below process.
4. VPN Server assigns an IP address to the client   and the internal address is also given to the client.
5. By using the the Internal IP address virtual network interface is established and by using this gateway an encrypted format of data is sent to the destination.
6. The Encrypted format of data will have the destination address and during the process of transferring the Data Public Internet is used, though it’s public other users can’t see the data since its in encrypted format.
7. At the Server’s end the Encrypted data will be automatically decrypted and the requested information will be sent to the client.