Juniper JNCIS Certification Exam jn0-531

The electrical power to the certifyme.com office has become unstable and brownouts
have become a regular occurrence. Which of the following should the certifyme.com
technician implement to protect the computer from these brownouts?

A. A power conditioner.
B. A surge protector.
C. A generator.70-290
D. An Uninterruptible Power Supply (UPS).
Answer: D
Explanation: An Uninterruptible Power Supply (UPS) system is a backup power
system that utilizes batteries to provide short-term power when a power losses such
as a black out or a brownout is detected.

Incorrect Answers:
A: Power conditioner devices assist in keeping the electrical service constant by
monitoring and regulating the power in the building.jn0-531 These devices can activate backup
power supplies.
B: Surge protectors are passive devices that are used to protect electrical components
from spikes in the power line.1Y0-258 Surge protectors usually utilize Metal Oxide Varistors
(MOVs) to shunt the voltage spike to ground.
C: A generator is used when a continuous power supply is needed in power loss
situations and is activated when a loss in power is detected. It does not protect electrical
components from spikes in the power line.

References:
Mike Pastore and Emmett Dulaney, Security+ Study Guide, 2nd Edition, Sybex,
Alameda, 2004, p 249.
Andy Ruth and Kurt Hudson, Security+ Certification Training Kit, Microsoft Press,
Redmond, 2003, Chapter 9, Lesson 1
Leading the way in IT testing and certification tools, www.certifyme.com
- 33 -


Todd King, The Security+ Training Guide, QUE Publishing, Indianapolis, 2003, Chapter
7