What is the common high-availability standard that allows about 5 minutes and 15 seconds of downtime per year?

What is the common high-availability standard that allows about 5 minutes and 15 seconds of downtime per year?

• A. Five Nines
• B. High Availability
• C. VRRP
• D. GLBP

Answer: (A)

Five nines describes an uptime target of 99.999%. At that level, downtime is about 0.001% of each year. A year has 31,536,000 seconds, and 0.001% of that is roughly 315 seconds, which is about 5 minutes 15 seconds. This is the standard used to express extremely high availability, matching the given downtime window. The other options describe concepts rather than a fixed uptime benchmark: high availability is the overall approach to keep services running with redundancy, while VRRP and GLBP are routing redundancy protocols that help maintain connectivity but don’t define a specific annual downtime.

Five nines describes an uptime target of 99.999%. At that level, downtime is about 0.001% of each year. A year has 31,536,000 seconds, and 0.001% of that is roughly 315 seconds, which is about 5 minutes 15 seconds. This is the standard used to express extremely high availability, matching the given downtime window. The other options describe concepts rather than a fixed uptime benchmark: high availability is the overall approach to keep services running with redundancy, while VRRP and GLBP are routing redundancy protocols that help maintain connectivity but don’t define a specific annual downtime.