What technology does Kerberos primarily use?

Kerberos primarily uses a single sign-on mechanism, allowing users to authenticate themselves once and gain access to multiple services without needing to re-enter credentials for each one. This is accomplished through the issuance of tickets by the Key Distribution Center (KDC), which then verifies the user's identity for access without the need to transmit passwords across the network. The single sign-on capability enhances user convenience and security by reducing the risk of credential interception during logins.

Other technologies mentioned, like two-factor authentication, token-based security, and biometric identification, serve different authentication purposes but are not the primary focus of Kerberos. While Kerberos does enhance security, it does so primarily through its unique ticketing system and centralized authentication process, making single sign-on its defining feature.