Kerberos is the most widely deployed authentication technology used by both Active Directory (AD) and single sign-on (SSO) systems in enterprise environments. It provides secure, ticket-based authentication, allowing users to access multiple services with a single set of credentials. AD relies on Kerberos as its default protocol, and Apple’s SSO integration with AD leverages Kerberos for seamless authentication on macOS and iOS. MSCHAPv2 (option B) is used in VPNs, not broadly in AD or SSO. OAuth (option C) and SAML (option D) are modern web-based standards, less common in traditional AD-SSO integration. TheApple Platform Security Guideconfirms Kerberos’ prevalence.
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