An ISP is currently drafting and compiling a Service Level Agreement that states there should only be 5.26 minutes of downtime per year, 25.9 seconds per month, and 6.05 seconds per week.
Which of the following percentages should be used to meet these metrics?
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A. B. C. D.C.
To meet the specified Service Level Agreement (SLA) requirements, the ISP needs to ensure that the server uptime meets the following durations:
To calculate the required uptime percentage to meet these metrics, we need to use the following formula:
Uptime percentage = (total downtime / total uptime + total downtime) x 100
Let's start with calculating the uptime required to meet the yearly downtime metric:
Total downtime per year = 5.26 minutes = 315.6 seconds
Total uptime per year = 365 days x 24 hours x 60 minutes x 60 seconds = 31,536,000 seconds
Uptime percentage = (315.6 / (31,536,000 + 315.6)) x 100 = 99.9990%
So, to meet the requirement of 5.26 minutes of downtime per year, the ISP needs to ensure 99.9990% uptime.
Now, let's calculate the uptime required to meet the monthly downtime metric:
Total downtime per month = 25.9 seconds
Total uptime per month = 30 days x 24 hours x 60 minutes x 60 seconds = 2,592,000 seconds
Uptime percentage = (25.9 / (2,592,000 + 25.9)) x 100 = 99.9990%
So, to meet the requirement of 25.9 seconds of downtime per month, the ISP needs to ensure 99.9990% uptime.
Finally, let's calculate the uptime required to meet the weekly downtime metric:
Total downtime per week = 6.05 seconds
Total uptime per week = 7 days x 24 hours x 60 minutes x 60 seconds = 604,800 seconds
Uptime percentage = (6.05 / (604,800 + 6.05)) x 100 = 99.9990%
So, to meet the requirement of 6.05 seconds of downtime per week, the ISP needs to ensure 99.9990% uptime.
Therefore, the uptime percentage required to meet all the specified SLA metrics is 99.999%, which is option C.