What is VPN? | How VPN woks? | Why is it important?

A Virtual Private Network (VPN) is an innovation that makes a safe and encrypted connection over a less secure network, for example, the internet. Virtual Private network is an approach to broaden a private network using an public network, like internet. The name just recommends that it is "Virtual Private Network" i.e. client can be the part of local network sitting at a remote area.

Tunneling protocols are used to build up a secure connection. To provide additional security, the data along with the source and destination network address are also encrypted.

Virtual Private Network (VPN):-

• Gives you online privacy and anonymity by creating a private network from a public internet connection.

• Masks your IP address so that your online activities are virtually untraceable.

• Establishes a secure and encrypted connections to provide a greater privacy than even a secured Wi-Fi hotspot.

• Benefits with cost effectiveness it facilitates in providing a single private network in comparison to using a separate leased lines which can be very costly.
  And, all this credit goes to the Internet, for providing the medium for uninterrupted VPN connections.

Setting up a VPN Connection:

• Authentication:
• Data packets gets encapsulated by wrapping it inside another packet with some headers and other stuffs attached to it.

• VPN Client initiates the connection by sending a REQ to the VPN server, and it replies with an ACK and asks for the user credentials for authenticity of the user.

• Tunneling:
• A imaginary tunnel is created to provide a direct point-to-point connection through the internet between the VPN client and host.

• All the data are sent through the tunnel.

• Encryption:
• The information that we send through the tunnel is encrypted before sending, thus, barring hackers to peep into our packets, as they will only see some unrecognizable bad data flowing through the tunnel.

HOW VPN WORKS ?

• At the point when you establish a connection of your PC (or another device, for example, a cell phone or tablet) to a VPN, the PC behaves like it's on a same local network as the VPN.

•  All your network traffic is sent over a secure connection to the VPN. 

• Since your PC acts as though it's on the network, this enables you to securely access the resources of local network even when you're on any part of the world. 

• You'll likewise have the option to use the Internet as though you were at the VPN's location, which has some benefits in case you're using pubic Wi-Fi or need to access geo-blocked websites. 

• At the point when you browse the web while connected to a VPN, your PC will request for the website through the encrypted VPN connection. 

• The VPN forwards the requests for you from its name and forwards the response from the website back through the secure connection. 

• This will let you left no trace behind of your device as the actual user because the VPN server is the user in this case. 

In case you're using a UK-based VPN to get to Netflix, Netflix will consider your connection to be as originating from within the UK.

WHAT ARE THE USES OF VPN?

• Mostly corporate offices having its office locations spread around the world use VPN to get a homogeneous network environment. This helps in providing an uninterrupted sharing of resources bypassing the geographical hurdles.

• VPN provides direct access to many geo-blocked websites or applications.

• Extends a private network over a public network, and enables users to send and receive data as if they were connected to the private network.