What is called the access protection system that limits connections by calling back the number of a previously authorized location?

What is called the access protection system that limits connections by calling back the number of a previously authorized location?
A .  Sendback systems
B .  Callback forward systems
C .  Callback systems
D .  Sendback forward systems

View Answer

Answer: C

Explanation: The Answer Call back Systems; Callback systems provide access protection by calling back the number of a previously authorized location, but this control can be compromised by call forwarding. Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 35