Which statement is correct regarding users that have not authenticated when accessing the Internet through FortiGate?

The statement regarding unauthenticated users accessing the Internet through FortiGate is accurate because FortiGate firewalls typically allow DNS queries to ensure that devices can resolve domain names to IP addresses even when users have not been authenticated. This is essential for functionality and usability, as DNS resolution is a fundamental step for many Internet services and applications, regardless of user authentication status. Allowing DNS access ensures that users can reach external resources effectively, which is crucial for both connectivity and efficient operation of networked applications.

In this context, while other options might present various conditions regarding access for unauthenticated users, only the allowance of DNS access stands out as a standardized policy enforced by FortiGate to facilitate basic internet navigation and resource discovery without necessitating prior user authentication.