Which of the following is an authentication method used for Identity Awareness?

Captive Portal is an authentication method used for Identity Awareness4. Captive Portal is a web-based authentication method that redirects users to a browser-based login page when they try to access the network. Users must provide their credentials to access the network resources. Captive Portal can be used for guest users or users who are not identified by other methods4. SSL, PKI, and RSA are not authentication methods used for Identity Awareness, but rather encryption or certificate technologies. References: Identity Awareness Reference Architecture and Best Practices