Disadvantages of Knowledge-based ID systems: This system is resources-intensive; the knowledge database continually needs maintenance and updates New, unique, or original attacks often go unnoticed.Disadvantages of Behavior-based ID systems: The system is characterized by high false alarm rates. High positives are the most common failure of ID systems and can create data noise that makes the system unusable. The activity and behavior of the users while in the networked system might not be static enough to effectively implement a behavior-based ID system. -Ronald Krutz The CISSP PREP Guide (gold edition) pg 88

With DMA, a DMAcontroller essentially takes control of the memory
busses and manages the data transfer directly. Answer interrupt
processing involves an external signal interrupting the
normal CPU program flow. This interrupt causes the CPU to halt
processing and jump to another program that services the interrupt.
When the interrupt has been serviced, the CPU returns to continue
executing the original program. Program control transfer,
answer c, is accomplished by the processor executing input/output
(I/O) instructions. Answer Direct access control is a distracter.

The security of the RSA system is based on the assumption that factoring the product into two original large prime numbers is difficult Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 4: Cryptography (page 159). Shon Harris, CISSP All-in-One Examine Guide, Third Edition, McGraw-Hill Companies, August 2005, Chapter 8: Cryptography, Page 636 - 639

Detective Physical Controls would use the following: motion detectors, closed circuit TV, sensors, and alarms.

Typical system administrator or enhanced operator functions can include the following Installing system software Starting up (booting) and shutting down a system Adding and removing system users Performing back-ups and recovery Handling printers and managing print queues -Ronald Krutz The CISSP PREP Guide (gold edition) pg 305-304