What is 'public Wi-Fi'?

Public Wi-Fi refers to unsecured wireless networks that are made available for anyone to use, typically in public spaces like cafes, airports, libraries, and parks. These networks do not require users to enter a password, making them easily accessible to the general public. However, the lack of security measures on these networks can pose risks, as sensitive data transmitted while connected to public Wi-Fi can potentially be intercepted by malicious actors.

The other options highlight different types of networks or services. Secure networks requiring a password are inherently distinct from public Wi-Fi because they involve some level of security and access control. Networks that provide free antivirus software are not a defining feature of Wi-Fi connectivity, and private networks for local businesses typically do not cater to the public at large, thus contrasting with the concept of public Wi-Fi.