What Is a VPN?

A VPN, defined as a Virtual Private Network, is the most common and most secure way to remotely connect to a network. A VPN creates a private network connection over the internet to connect remote systems or users to each other. Rather than using a dedicated connection, a VPN uses virtual connections routed over the internet from the remote system or user to our secure internal network. Security is ensured by encrypting all transmissions.

A VPN allows a remote user to have network access just as if they were local on the private network. In other words, while working outside the company or when mobile, it allows you to securely use internal resources by being integrated into the company. This not only connects the user to the network as if they were local, but also encrypts the connection using secure communication protocols.

The VPN we became familiar with during the pandemic allows most organisations to securely connect many employees working from home, travelling, or mobile to the system.

To achieve these purposes, a VPN needs to mimic a direct network connection. In this case, it creates a virtual network connection between two points. The data sent is encrypted and the virtual network becomes a private corporate network over the internet. To mimic the point-to-point connection, data is encapsulated or wrapped with a header that provides routing information as it travels to its destination.

What Is a VPN and How Is Its Security Ensured?

A VPN does not require additional technology or direct cabling. It is used as a virtual private network. In other words, it can use existing connections to provide a secure connection. In most cases, employees working over normal internet connections provide a secure connection to the corporate network.

Various methods are used in VPN technologies to connect one computer to another. In today’s world, cable modems, cellular devices, and other mechanisms come pre-adapted to VPN technologies.

We use many technologies when connecting to the internet, and a large portion of these technologies are insecure. All data sent or received is not encrypted, and a person who intercepts it can use a packet sniffer to capture and view the data. Additionally, the identity of both parties is not always verified. This means you can never be completely sure who you are actually sending data to or receiving data from. VPN technologies, however, always provide a dedicated solution to these problems.

Although individual remote users use VPN technology to access blocked sites, that is not the actual purpose of VPN. Many large organisations have offices in various locations. Such organisations need to provide reliable and secure connectivity for their branches and offices.

When ensuring VPN security, it creates a dedicated tunnel to transmit user data and sends the data in encrypted form through this tunnel. This protects the transmitted data against the internet service provider and attackers. The encryption process is performed using an encryption key known only to the device and the VPN server.