From last few decades, the internet is helping the people around the world. The technology used in connecting the people to the internet is growing day by day. Researchers are working to provide the internet users with ease, comfort, and security. VPN is one of these technologies. It stands for virtual private network. It let the people around the world set up their private network on the internet. In this technology people connect from a different part of the world by establishing a private network, they can share and access data remotely. Organizations and People around the world can set a private network on the internet. They can share their data and can also remotely access the data share by other people.

When a user makes a request to some website his request first goes to VPN server, then server forward the request to a site and receive the data from a website.

The devices connected over the VPN can communicate without any interruption. There is no physical or digital barrier in the mid-way of communication.
Before understanding the virtual private network further, one must have an idea of different protocols used in setting up a virtual private network.
The list of different protocols is given below.

Secure Socket Layer (SSL)

Secure Socket Layer used a three-way handshake method.In three-way handshake, the client and server communicate to transfer data over the server. Three-way handshake helps the secure socket layer to establish a secure connection between client and server. The process of authentication in secure socket layer is based on cryptography. Certificates are used for initializing the connection between client and server, these documents are stored in client and server, and behaves as cryptographic keys in the authentication process.

 

IPsec

IP security protocol is used to secure the VPN. It works on tunneling mode or transport mode. Tunneling mode only encrypts the payload in the data, on the other hand, tunneling method encrypts the complete data to be transmitted.

Point to Point Transfer Protocol

The PPTP protocol uses tunneling mode for its operations. It connects a client remotely from some location to a private server in a virtual private network. It is the most adopted VPN due to its simple working and maintainability.

 

Also read: What is Web Server? How users make request.?

Layer two Tunneling Protocol

L2TP provide us the tunneling of data between two geographical sites over the virtual private network. It sometimes used in combination with the IPSec protocol.

When a user connected to a public network i-e internet, the data of user assume to flow through a big tunnel along with the data of all other people using the internet. This is a risk, anyone can quickly sniff the data packet of users, and can spy on him. VPN resolve this issue for internet users. In virtual private network data move through a secret tunnel inside the big tunnel. No one can recognize the data of user because data transformed into garbage values.

There are three phases involve in setting a VPN

Authentication:

Data packets are encapsulated in authentication step of VPN. We can say data packets are wrapped inside other packet and header and other stuff attached to it; this is all done to conceal the identity of data packets. Now, if a user initiates a connection with VPN by sending a request to his device, it will reply with an acknowledgment and will ask the user for authenticity.

Tunneling

Now, after completing the authentication phase, an imaginary tunnel will create which will provide a direct point to point connection through the internet. By using the tunnel, we can send the data of our choice to the virtual private network.

Encryption

Encryption is the most important part in setting up a virtual private network. After creating the tunnel, users can send his data over VPN, but there is a problem. The data of the user is not encrypted yet. Sometimes user prefers a free virtual private network, which also used by other people around the world. They can see the data of a user and can also sniff the data of the user. So, the user needs to encrypt the data and then after encryption, he can send it over the tunnel.

what-is-vpn-working

 

Also read: google’s hidden features you may don’t know

Some Popular VPN servers

Here are some traditional virtual private networks that you will love to use.
HideMyAss, PureVPN, Vypr VPN, are some of the famous services that provide the users with security.

Surf Easy, Tunnel Bear, Cyber Ghost are some free services with limited resources and functionality.

Hope you will like this article, share your views or if you want any improvement in this article, with us by commenting below this post. Share with your friends and let them know about Virtual Private Network.

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