VPN stands for Virtual private network. Consider a company network or college network where tools, resources are restricted to users within the same network, users outside the network do not have access to the resources or the tools. Consider yourself to be an employee of that company or student of that college, you will have access to all the resources up till you are in their network.

After you reach home , there might be a situation where you are in a dire need to access the resources of the company or the college . But you are no longer on their network. What you have at your home is a normal internet connection which is a public network. Everyone can access internet resource hence it falls under public domain.

VPN make’s the above scenario of accessing the company’s private network possible using your public network(internet) .VPN is a technology which make’s you feel that you are directly connected to the private network.

his way, the server becomes your secure launching pad for accessing various websites. Typically, when you try to access a website on the internet, you start by connecting to your internet service provider (ISP).

They redirect you to any websites or other online resources that you wish to visit. All your internet traffic passes through your ISP’s servers, which means they can see and log everything you do online.

They may even hand your browsing history over to advertisers, government agencies, and other third parties. Here’s where a VPN comes into play. It redirects your internet traffic through a specially configured remote server.

A VPN can change the situation drastically. If you connect to a VPN, it does two things before connecting to your ISP:

It redirects your internet traffic through one of its servers. A VPN provider usually has thousands of servers in all corners of the world, so you can choose one that’s closest to your home for the fastest connection. When you connect to the server, you also get it’s IP address — your real one stays hidden as long as you are using a VPN.
Once your device connects to the server, the VPN encrypts your data. It becomes impossible to read — your ISP, government agencies, and hackers are unable to see what information your device is sending or downloading. A VPN also hides your online identity by changing your IP (and, therefore, your virtual location) and shielding your activities from prying eyes.

This way, the VPN hides your IP address and encrypts all the data you send or receive. The encrypted data looks like gibberish to anyone who intercepts it is impossible to read.

Even if you have nothing to hide, you probably don’t like the idea of being watched and tracked. So the main reason why internet users choose VPN services is online allerta privacy and general security.

When you browse the internet using a VPN, your communications are encrypted, so your ISP, government, hackers and other third parties are not able to see which websites you visit and cannot interfere with your online activities.

Another great thing about using a VPN is that you can access the global internet wherever you are. A VPN allows you to connect to hundreds of remote servers in different locations, this way bypassing censorship.

When you’re using a public Wi-Fi network, even a password-protected one, a VPN is your best friend. That’s because using public hotspots can be rife with hazards. Hackers have many methods to intercept your internet traffic and steal your passwords, files, and photos.

There are various types of VPN you can check on https://vpntesting.com/ , eg IPSec which works at layer 3 of network stack, SSL/TLS which works at layer 4 of network stack.

To setup a VPN there should be a handshake procedure between your public network and company’s private network where they agree on authentication and encryption algorithm to be used to send the traffic. This point is for the security perspective because once your private data is there on public network , it is under a risk of being stolen or modified or attacked.


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