CompTIA Network+ (N10-009) — Question 76

Which of the following is used to estimate the average life span of a device?

Answer options

• A. RPO
• B. RTO
• C. MTTR
• D. MTBF

Correct answer: D

Explanation

MTBF, or Mean Time Between Failures, is specifically designed to measure the average time a device operates before experiencing a failure, making it the correct choice. RPO (Recovery Point Objective) and RTO (Recovery Time Objective) relate to data recovery strategies, while MTTR (Mean Time To Repair) focuses on the repair duration after a failure occurs.