CompTIA Security+ Question G-73

Which of the following is mainly used for remote access into the network?

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

Answer: D

Explanation:
Most gateways that control access to the network have a RADIUS client component that communicates with the RADIUS server. Therefore, it can be inferred that RADIUS is primarily used for remote access.