CompTIA A+ Core 2 (220-1102) — Question 55

Which of the following is a proprietary Cisco AAA protocol?

Answer options

• A. TKIP
• B. AES
• C. RADIUS.
• D. TACACS+

Correct answer: D

Explanation

TACACS+ is a proprietary protocol created by Cisco for Authentication, Authorization, and Accounting (AAA) services, making it the correct answer. TKIP and AES are encryption protocols, while RADIUS is an open standard protocol, not exclusive to Cisco.