What is the primary function of a VPN?

The primary function of a VPN (Virtual Private Network) is to encrypt the connection between two devices, which ensures that data transmitted over the internet is secure and private. This encryption creates a secure "tunnel" through which data can travel, protecting it from potential eavesdroppers and cyber threats. By encrypting the data, a VPN helps maintain user privacy, especially when accessing sensitive information on public or unsecured networks.

The additional functions listed in the other options do not accurately describe the primary role of a VPN. For instance, while using a VPN can indirectly help with privacy and security that may improve internet use, it does not specifically enhance overall internet speed as its main purpose. Similarly, blocking malware and viruses typically falls under the purview of specialized software like antivirus programs and firewalls, rather than a VPN. Monitoring internet activity, on the other hand, often refers to tracking user data or behavior, which contradicts the privacy principles that a VPN aims to uphold. Therefore, the correct focus on encryption highlights the essential security feature of a VPN.