Implementing Cisco Network Security (IINS, legacy) — Question 119

In which three ways does the TACACS protocol differ from RADIUS? (Choose three.)

Answer options

• A. TACACS uses TCP to communicate with the NAS.
• B. TACACS can encrypt the entire packet that is sent to the NAS.
• C. TACACS supports per-command authorization.
• D. TACACS authenticates and authorizes simultaneously, causing fewer packets to be transmitted.
• E. TACACS uses UDP to communicate with the NAS.
• F. TACACS encrypts only the password field in an authentication packet.

Correct answer: A, B, C

Explanation

The correct answers are A, B, and C because TACACS uses TCP which provides reliable communication, encrypts the entire packet for enhanced security, and allows per-command authorization. Options D, E, and F are incorrect since TACACS does not use UDP, does not authenticate and authorize simultaneously, and does not just encrypt the password field.