Which of the following authentication protocols issues time-stamped tickets through a Key Distribution Center (KDC), allowing a user to access multiple network resources after a single sign-on?
Kerberos
Remote Authentication Dial-In User Service (RADIUS)
Terminal Access Controller Access-Control System Plus (TACACS+)
Kerberos is the only option that relies on a KDC to issue a ticket-granting ticket (TGT) and subsequent service tickets, enabling secure, ticket-based single sign-on across the network. RADIUS and TACACS+ are AAA protocols that use challenge/response or attribute pairs rather than tickets, and LDAP is a directory access protocol, not an authentication system that issues tickets.
References:
Kerberos protocol overview: Wikipedia - Kerberos (protocol)
Kerberos ticket-granting service explanation: TechTarget - What is Kerberos and how does it work?
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