A cybersecurity analyst is assessing the reliability of a critical server over the past year. The server is expected to be available 24/7. During the 8,760-hour period, the server experienced 4 failures, resulting in a total of 60 hours of downtime. What is the Mean Time Between Failures (MTBF) for this server?
To calculate the Mean Time Between Failures (MTBF), you must first determine the total uptime by subtracting the total downtime from the total time period. The total uptime is 8,760 hours - 60 hours = 8,700 hours. Next, divide the total uptime by the number of failures: 8,700 hours / 4 failures = 2,175 hours. The distractor '2,190 hours' results from incorrectly using the total time period instead of the uptime. The distractor '15 hours' is the Mean Time to Repair (MTTR), not the MTBF.
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