Implementing Cisco Network Security (IINS, legacy) — Question 35

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 authenticates and authorizes simultaneously, causing fewer packets to be transmitted
• D. TACACS uses UDP to communicate with the NAS
• E. TACACS encrypts only the password field in an authentication packet

Correct answer: T, A, C, A, C, S

Explanation

The correct answers are A, B, and C. TACACS indeed uses TCP to communicate, which provides a reliable connection, and it also supports full packet encryption, enhancing security. Additionally, TACACS can perform authentication and authorization in one step, reducing the number of packets. In contrast, D is incorrect because TACACS does not use UDP, and E is wrong as TACACS encrypts all data, not just the password.