What is a VPN? How VPNs work?

Often we hear about VPNs and the benefits they may contain for web browsing and today we’ll go deeper into the subject to explain all the details of the virtual private network which helps to establish a connection to other computers in a safe way.

What is a VPN and what does it do?

The first thing we need to understand is the real concept of virtual private network, which is basically a secure network of private browsing that allows computers and devices to connect through an extension of the Internet, without being actually linked to the network, allowing secure transmission of data.

To get a clearer picture, let’s imagine two remote offices that require transmitting data or information and for this it is necessary to connect the computers to a VPN network through an extension of the Internet, that is, through the internet but without involving third parties since it is not a public network.


This connection can be given by remote access, wired connection, through something called Tunneling (Tunnel by SSH) or by internal network (LAN). Because of that, below we explain a little of what each connection means:

  • Connection by remote access, is perhaps the most commonly used method, because it allows to shorten the distances that may have the involved devices, which likewise use the Internet as an extension of coded service where users will be able to access and communicate.
  • The wired connection is the most commonly used for transmitting information within an office or headquarters of any company, its operation is more expensive than remote access, since it is necessary to establish a highway of cables that are distributed through all the nodes and that also reach the servers or central source of the internet.
  • Tunneling refers to the creation of a navigation tunnel within a VPN connection, it is also referred to as network encapsulator protocol, this allows you to create new connections to the private network within the existing for example, to redirect an IP without modifying its content, you can also send information simultaneously to different devices.
  • LAN connection, works as a network connections filter, for example: information of great importance for a company that only the owner of the area has the possibility to get, but that can equally can be transmitted to other computers via VPN, this also allows further secure wireless connections.

In short, the virtual private network works as a “connector” of more than two devices that are equidistant, which can only be accessed through a user name and password that will be determined when creating the system; the way in which the VPNs work will determine which of them you should use, but in the end, they have the same pattern.

This tool facilitates remote connection between two computers, that is why the technical service department or systems can access other computers without the need to be present.

This connection method is the most widely used today and not only can connect PCs or laptops but devices of any operating system can access these VPN, where can connect to a wireless network without taking the risk of being intercepted or jeopardizing the security of the information transmitted, there are even applications that provide VPN service for mobile devices.

As you see, the benefits of VPN are full advantage for companies with one or more locations, so if you need to connect a branch of computers with particular access systems this is the best and most used option.

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