What is the function of a VPN?

The primary function of a VPN, or Virtual Private Network, is to create a secure connection over a less secure network, such as the internet. This is achieved by encrypting data transmitted between the user's device and the VPN server, ensuring that sensitive information remains confidential and protected from potential interception by third parties. By establishing a secure tunnel, a VPN also helps to mask the user's IP address, enhancing privacy and anonymity while browsing online.

While other options touch on various network functionalities, they do not accurately capture the core purpose of a VPN. For example, increasing network speed and improving data transfer rates are not inherent features of a VPN; in fact, a VPN may sometimes introduce additional latency due to the encryption process. Managing multiple devices over a single network pertains more to network configuration rather than the specific role of a VPN. Thus, the essence of a VPN lies in its ability to provide secure, private connections in environments where security cannot be guaranteed inherently.