CAS-002 Question #20: Real Exam Question with Answer & Explanation

The correct answer is D: Kerberos. Kerberos is a network authentication protocol designed around a ticket-based system. A client first authenticates to a Key Distribution Center (KDC) and receives a Ticket Granting Ticket (TGT). The client then uses the TGT to request service tickets for specific resources without

Question

Which of the following authentication types is used primarily to authenticate users through the use of tickets?

Options

ALDAP
BRADIUS
CTACACS+
DKerberos

Explanation

Kerberos is a network authentication protocol designed around a ticket-based system. A client first authenticates to a Key Distribution Center (KDC) and receives a Ticket Granting Ticket (TGT). The client then uses the TGT to request service tickets for specific resources without transmitting the user's password across the network. LDAP (A) is a directory access protocol used to look up and manage directory entries, not authenticate via tickets. RADIUS (B) is an AAA protocol that uses a shared-secret challenge-response mechanism. TACACS+ (C) is also an AAA protocol that separates authentication, authorization, and accounting but does not use tickets.

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