CompTIA Cloud Essentials+ (CLO-002)Business Principles of Cloud EnvironmentsHard
A cloud provider offers a Service Level Agreement (SLA) for its Infrastructure as a Service (IaaS) offering, guaranteeing 99.9% uptime for virtual machines. If the service experiences 1.5 hours of unplanned downtime in a given month (30 days), how many minutes of downtime is this equivalent to, and does it breach the SLA?
- A90 minutes; Yes, it breaches the SLA.
- B43.2 minutes; Yes, it breaches the SLA.
- C90 minutes; No, it does not breach the SLA.
- D43.2 minutes; No, it does not breach the SLA.
Show answer & explanationAnswer & explanation
Correct answer: A. 90 minutes; Yes, it breaches the SLA.
First, calculate total minutes in a 30-day month: 30 days * 24 hours/day * 60 minutes/hour = 43,200 minutes. For 99.9% uptime, the maximum allowed downtime is 0.1% of the total time: 43,200 minutes * 0.001 = 43.2 minutes. The actual downtime is 1.5 hours * 60 minutes/hour = 90 minutes. Since 90 minutes > 43.2 minutes, the SLA is breached.
Why the other options are wrong
- B. Incorrectly calculates actual downtime and incorrectly assesses the SLA breach.
- C. Correctly calculates actual downtime but incorrectly assesses the SLA breach.
- D. Incorrectly calculates actual downtime and incorrectly assesses the SLA breach.
Service Level Agreement (SLA) Calculation
An SLA defines the level of service expected from a vendor. Uptime guarantees are calculated by determining the maximum allowed downtime based on the percentage and total time period.
- Total time period (e.g., month) is crucial
- Uptime % dictates allowed downtime %
- Convert all times to a consistent unit (minutes/hours)
Memory trick: SLA: Calculate total minutes, find allowed downtime, compare to actual.