Implementing and Configuring Cisco Identity Services Engine (SISE) — Question 94

What are two differences between the RADIUS and TACACS+ protocols? (Choose two.)

Answer options

• A. RADIUS offers multiprotocol support, whereas TACACS+ does not.
• B. RADIUS is a Cisco proprietary protocol, whereas TACACS+ is an open standard protocol.
• C. RADIUS enables encryption of all the packets, whereas with TACACS+, only the password is encrypted.
• D. RADIUS combines authentication and authorization, whereas TACACS+ does not.
• E. TACACS+ uses TCP port 49, whereas RADIUS uses UDP ports 1812 and 1813.

Correct answer: D, E

Explanation

The correct answers are D and E. RADIUS combines authentication and authorization in one step, while TACACS+ separates them, allowing for more granular control. Additionally, TACACS+ uses TCP port 49 for its communication, whereas RADIUS operates on UDP ports 1812 and 1813, which are essential distinctions between the two protocols.