CCNA Exam Prep 52, AAA — RADIUS vs TACACS+
Jul 27, 2026
This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.
In this episode you will learn:
- The difference between connection-oriented TCP for TACACS+ (port 49) versus connectionless UDP for RADIUS (ports 1812/1813).
- Why TACACS+ is more secure, as it encrypts the entire packet payload, while RADIUS only encrypts the user password.
- How TACACS+ provides more granular control by separating authentication, authorization, and accounting, unlike RADIUS which combines authentication and authorization.
- How to identify the correct protocol in an exam scenario based on keywords like 'multi-vendor' (RADIUS) or 'command-level authorization' (TACACS+).
- The significance of TACACS+ being a Cisco-proprietary protocol versus RADIUS being an open IETF standard.
For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep
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