Episode 110. Authentication — RADIUS, TACACS+, Kerberos

from Certified - The CompTIA A+ Audio Course Hosted by Dr. Jason Edwards

Authentication protocols ensure that users are who they say they are, and this episode covers three of the most important ones for the A Plus exam. We begin with RADIUS—Remote Authentication Dial-In User Service—and explain how it centralizes authentication for wireless and VPN access. Next, we look at TACACS Plus, a Cisco-designed protocol that separates authentication, authorization, and accounting into distinct processes. Finally, we introduce Kerberos, a ticket-based authentication system used in Windows domains, and explain how it improves security over password-only systems. These protocols may seem abstract, but CompTIA expects you to recognize them by function, use case, and system type. This episode equips you with a solid understanding of when and why each protocol is used. Brought to you by BareMetalCyber.com.

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Episode 110. Authentication — RADIUS, TACACS+, Kerberos

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This episode is 12 minutes long.

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This episode was published on August 17, 2025.

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