Which of the following remote access authentication systems is the most robust?

Which of the following remote access authentication systems is the most robust?
A .  TACACS+
B .  RADIUS
C .  PAP
D .  TACACS

View Answer

Answer: A

Explanation: TACACS+ is a proprietary Cisco enhancement to TACACS and is more robust than RADIUS. PAP is not a remote access authentication system but a remote node security protocol. Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 3: Telecommunications and Network Security (page 122).