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VPN – Brief definition

A VPN (Virtual Private Network) encrypts the internet connection, providing greater privacy and an increased level of security.

The term VPN was previously familiar mainly to IT experts in large companies who have long used this technology to provide employees working from home with secure access to company servers. However, Virtual Private Networks are gaining increasing popularity and allow users to utilize public networks with a protected connection.

How does a VPN work?

A VPN creates a so-called tunnel that encrypts users' data. Simply put, this means that data is encrypted on the device being used, transmitted over the internet connection to a specific VPN server, and only decrypted there. These servers then appear as the source of requests to the websites or services being used. In this way, VPN connections can theoretically bypass geographical restrictions on streaming services. Most importantly, the operators of the internet connection being used – for example, the Internet Service Provider – have no insight into the contents of the encrypted data traffic.


Setting up a VPN can be done on various devices:

  • Router: Many modern routers support VPN clients. The setup is usually done through the respective user interface. 
  • Mobile phone: VPN apps can be downloaded, and on modern smartphones, the connection can often be configured directly through the system settings. 
  • PC: Software can be installed on computers to establish the VPN connection. Most popular VPN services offer user-friendly software for Windows and macOS.


However, users must first find a suitable VPN provider that meets their personal requirements. There are both free and paid options available. It is important to note that free VPNs are often slower and may be funded by advertising or the sale of data. Users should thoroughly research before choosing a provider.

What types of VPN connections are there?

There are several types of VPN connections, including:

  • SSL-VPN: Uses SSL technology to provide secure access via a web browser.
  • Site-to-Site VPN: Connects two or more networks together. This solution is primarily used by large companies that want to link the local networks of different locations.
  • End-to-Site VPN (also Remote Access VPN): Allows users to securely connect to a private network from a remote location.
  • End-to-End VPN: Establishes a tunnel between two fixed endpoints – typically a device and a server.
  • Personal VPN: The common type of VPN for private users. Devices used are connected to a VPN server.

VPN: Advantages and Disadvantages

VPNs offer more security. They are particularly recommended for users who value security or are frequently on the go. Public networks in airports and hotels are especially vulnerable to hacker attacks and are significantly safer to use with VPN protection.


VPNs are legal in many countries. However, this is not the case everywhere. For example, China prohibits the use of VPN services. Users should therefore inform themselves about the local legislation at their travel destination before a trip. The use of VPNs to bypass geographical restrictions on streaming services is not inherently illegal, but it may violate the terms of service depending on the provider. Again, prior verification is necessary.


Are VPNs worth the money? This question cannot be answered universally, as individual usage behavior is crucial. Those who regularly take advantage of the anonymization of their data benefit from the added security. In general, it is advisable to rely on reputable VPN providers.