Which metric describes the percentage of time a system remains operational under normal conditions?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Study for the CompTIA SecurityX Test. Equip yourself with comprehensive flashcards and multiple choice questions that include hints and explanations. Gear up for your certification exam!

Multiple Choice

Which metric describes the percentage of time a system remains operational under normal conditions?

Explanation:
Availability describes the percentage of time a system remains operational under normal conditions. It captures uptime as a share of total time, reflecting how often the system is functioning when needed. A helpful way to see this is Availability = MTBF / (MTBF + MTTR). For example, if a system runs for 100 hours before a failure and takes 5 hours to repair, its availability is 100 / (100 + 5) = 95.2%. This shows how both longer periods of operation and shorter repair times raise the portion of time the system is active. Reliability is about the probability the system will perform without failure during a given period, MTBF is the average time between failures, and MTTR is the time to repair after a failure. These describe different aspects, but they don’t directly express the fraction of time the system is up, which is what availability captures.

Availability describes the percentage of time a system remains operational under normal conditions. It captures uptime as a share of total time, reflecting how often the system is functioning when needed. A helpful way to see this is Availability = MTBF / (MTBF + MTTR). For example, if a system runs for 100 hours before a failure and takes 5 hours to repair, its availability is 100 / (100 + 5) = 95.2%. This shows how both longer periods of operation and shorter repair times raise the portion of time the system is active.

Reliability is about the probability the system will perform without failure during a given period, MTBF is the average time between failures, and MTTR is the time to repair after a failure. These describe different aspects, but they don’t directly express the fraction of time the system is up, which is what availability captures.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy