300-715 Question #385: Real Exam Question with Answer & Explanation

Question

What is a difference between TACACS+ and RADIUS protocol traffic?

Options

• ATACACS+ uses UDP at the transport layer, and RADIUS uses TCP at the transport layer.
• BTACACS+ separates each AAA function, and RADIUS combines authentication and
• CTACACS+ encrypts passwords only, and RADIUS encrypts the entire packet payload.
• DTACACS+ supports IP traffic only at the network layer, and RADIUS supports multiple protocols.

Explanation

{"question_number": 8, "question": "What is a difference between TACACS+ and RADIUS protocol traffic?", "correct_answer": "B", "explanation": "TACACS+ separates the three AAA functions - Authentication, Authorization, and Accounting - into independent, modular processes, allowing granular control over each function independently. RADIUS combines authentication and authorization into a single exchange (the Access-Accept response carries both authentication results and authorization attributes simultaneously). Additionally, TACACS+ uses TCP for reliable transport while RADIUS uses UDP; TACACS+ encrypts the entire packet payload while RADIUS only encrypts the password field; and RADIUS supports multiple network layer protocols while TACACS+ was originally IP-centric. Answer B correctly identifies the key architectural difference.", "generated_by": "claude-sonnet", "llm_judge_score": 4}

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