CompTIA Security Plus Mock Test Q875

Which of the following authentication services should be replaced with a more secure alternative?

A. RADIUS
B. TACACS
C. TACACS+
D. XTACACS

Correct Answer: B
Section: Access Control and Identity Management

Explanation:
Terminal Access Controller Access-Control System (TACACS) is less secure than XTACACS, which is a proprietary extension of TACACS, and less secure than TACACS+, which
replaced TACACS and XTACACS.

Incorrect Answers:
A, C: TACACS+ and RADIUS have mostly replaced TACACS and XTACACS in modern networks.
D: XTACACS is a proprietary extension of TACACS.

References:
http://en.wikipedia.org/wiki/TACACS