What is the main purpose of implementing a Virtual Private Network (VPN)?

The main purpose of implementing a Virtual Private Network (VPN) is to secure data transmission over the internet. A VPN creates a secure and encrypted tunnel between a user's device and the VPN server, which helps protect sensitive information from being intercepted during transmission. This is particularly crucial when using public Wi-Fi networks, where data is more vulnerable to eavesdropping and potential attacks.

By encrypting the data, VPNs ensure that it remains confidential and protected from unauthorized access while in transit. This significantly enhances security, as it prevents attackers from viewing or manipulating data that is being sent or received over the internet.

While blocking unauthorized access, ensuring data integrity, and managing user authentication are all important aspects of network security, the primary function of a VPN revolves around securing the data exchange itself, making the option of securing data transmission the most directly aligned with the fundamental purpose of a VPN.