How does a VPN enhance security?

A VPN, or Virtual Private Network, enhances security primarily by encrypting data sent over the internet. This encryption creates a secure tunnel between the user's device and the VPN server, making it difficult for hackers, ISPs, or any unauthorized parties to intercept and read the data being transmitted. This is particularly important when using public Wi-Fi networks, which are often less secure and more susceptible to eavesdropping.

The encryption process ensures that sensitive information, such as passwords, personal identification details, and private communications, remains confidential. By doing so, a VPN provides users with greater privacy and protection against data theft, thereby enhancing overall online security.

In contrast to the correct answer, other choices do not contribute to heightened security. For instance, slowing down internet speed can be a side effect of using a VPN but does not enhance security; an open connection would make data vulnerability more likely rather than less; and limiting user access to websites does not protect data but may restrict the user's browsing freedom.