CompTIA Exam Questions

Which of the following protocols uses TCP instead of UD…

Which of the following protocols uses TCP instead of UDP and is incompatible with all previous versions?

A.
TACACS

B.
XTACACS

C.
RADIUS

D.
TACACS+

Explanation:
TACACS+ is not compatible with TACACS and XTACACS, and makes use of TCP.