CISSP – Information Systems Security Architecture Professional (ISSAP) — Question 48

Which of the following devices is a least expensive power protection device for filtering the electrical stream to control power surges, noise, power sags, and power spikes?

Answer options

• A. Line Conditioner
• B. Surge Suppressor
• C. Uninterrupted Power Supply (UPS)
• D. Expansion Bus

Correct answer: C

Explanation

The correct answer is C, as an Uninterrupted Power Supply (UPS) not only provides power backup but also filters electrical disturbances. Options A (Line Conditioner) and B (Surge Suppressor) offer some level of protection but do not provide the same comprehensive power management as a UPS, and D (Expansion Bus) is unrelated to power protection.