CompTIA Network+ (N10-007) — Question 651

Which of the following is used to protect the servers when a datacenter fails over from a primary power source to a secondary power source?

Answer options

• A. A redundant power circuit
• B. A dual power supply
• C. A battery backup
• D. A generator

Correct answer: C

Explanation

A battery backup is essential for providing immediate power to servers during a transition to a secondary power source, ensuring no downtime. While a redundant power circuit and dual power supplies enhance overall power reliability, they do not specifically address the issue of power failure. A generator provides backup power but typically takes time to start, unlike a battery backup that offers instant support.