CompTIA Security+ (SY0-501) — Question 117

The Chief Technology Officer (CTO) of a company, Ann, is putting together a hardware budget for the next 10 years. She is asking for the average lifespan of each hardware device so that she is able to calculate when she will have to replace each device.
Which of the following categories BEST describes what she is looking for?

Answer options

• A. ALE
• B. MTTR
• C. MTBF
• D. MTTF

Correct answer: D

Explanation

The correct answer is MTTF (Mean Time To Failure), which indicates the average time until a device fails and needs replacement. ALE (Annual Loss Expectancy), MTTR (Mean Time To Repair), and MTBF (Mean Time Between Failures) are related to different aspects of hardware reliability and maintenance, but they do not directly address the average lifespan of hardware devices.