What authentication methods are NOT supported for hotspot users?

The correct choice highlights that connecting without accepting Terms and Conditions is not supported for hotspot users. This is because, in many hotspot configurations, particularly those that provide public Internet access, it is a standard requirement for users to agree to these terms before they can gain access to the network. Accepting Terms and Conditions serves as a legal acknowledgment of the network's usage policies, which often include important details about data usage, liability, and acceptable behavior while online. This requirement helps in managing legal risks for the network provider and ensures users are aware of their responsibilities while using the service.

In contrast, authenticating with a passphrase or a user name and passphrase is commonplace and works as a straightforward method for verifying user identities. Additionally, allowing users to connect without credentials under certain conditions might be used in guest networking scenarios, although it doesn't align with established security practices.