What is Kerberos?

A.
A three-headed dog from the Egyptian mythology.

B.
A trusted third-party authentication protocol.

C.
A security model.

D.
A remote authentication dial-in user server.

Explanation:
Kerberos is a third-party authentication service that can be used to support SSO.
Kerberos (or Cerberus) was the name of the three-headed dog that guarded the entrance to Hades in Greek
mythology.
Incorrect Answers:
A: Kerberos (or Cerberus) was the name of the three-headed dog that guarded the entrance to Hades in Greek
mythology. We are, however, dealing with information systems, not mythology.
C: Kerberos is an authentication protocol, not just a security model.
D: A remote authentication dial in user server refers to RADIUS, not Kerberos.

Conrad, Eric, Seth Misenar, Joshua Feldman, CISSP Study Guide, 2nd Edition, Syngress, Waltham, 2012, pp.
22, 43