CISSP – Information Systems Security Architecture Professional (ISSAP) — Question 49

Which of the following electrical events shows a sudden drop of power source that can cause a wide variety of problems on a PC or a network?

Answer options

• A. Blackout
• B. Power spike
• C. Power sag
• D. Power surge

Correct answer: A

Explanation

A blackout is a total loss of electrical power, which can cause significant disruptions to PCs and networks. In contrast, a power spike involves a sudden increase in voltage, a power sag is a temporary drop in voltage, and a power surge is a brief increase in voltage, none of which represent a complete power loss like a blackout does.