CompTIA Network+

Answer: B - Kerberos is an authentication protocol that relies on a Ticket Granting Ticket System for identity verification to network resources.

Key takeaway: Kerberos utilizes a central server for authentication purposes. The way Kerberos works is a client will authenticate with an AS, or Authentication Server. The AS will then give the client a time stamped “Ticket” which the client will then present to the network resource and is then authenticated for the service being requested. The client and resource then negotiates session keys and establishes a secure connection with each other. This is a very simplified description, but essentially covers how it works. In essence, it is an authentication method utilized for mutual authentication typically in “client-server” networks.