CompTIA A+ Core 2 (220-1002) — Question 74

Which of the following devices provides protection against brownouts?

Answer options

• A. battery backup
• B. surge suppressor
• C. rack grounding
• D. line conditioner

Correct answer: D

Explanation

A line conditioner is specifically designed to regulate voltage and provide stable power, making it effective against brownouts. A battery backup provides power during outages, but does not prevent brownouts; a surge suppressor protects against voltage spikes, and rack grounding is for safety and EMI reduction, not power stability.