Which three authentication protocols allow clients to use certificates for authentication? (Choose three.)

The correct choice includes EAP-TLS, which stands out as a robust authentication protocol specifically designed for environments that utilize digital certificates. EAP-TLS employs both server and client certificates to establish a secure connection, ensuring strong mutual authentication. This method is favored in scenarios that demand a high level of security, as the use of certificates mitigates risks associated with password-based authentication.

PEAP and EAP-FAST are also valid protocols that can utilize certificates, making them part of the correct answers as well. PEAP creates a secure tunnel in which the inner authentication can occur. While it uses a server-side certificate to establish the secure tunnel, the client authentication can involve additional methods which, depending on the configuration, may or may not require client certificates.

EAP-FAST, developed by Cisco, also provides a method for secure authentication. Similar to PEAP, it can use certificates to establish a secure communication channel, but it does not necessarily require them for client authentication, allowing flexibility in deployment.

EAP-MD5, on the other hand, is based solely on username and password without any support for certificate-based authentication, making it unsuitable for this question's criteria regarding the use of client certificates.

Thus, the ability of EAP-TLS