According to “five nines”(99.999%) Uptime Service Level Agreement ( SLA ) , please calculate the maximum time allowed for network service interruption in one month(30 days). (Tip: “ Uptime ” defines the percentage of time a particular system is operational . In IT , it is one of the most vital metrics associated with the performance of mission-critical systems . The higher theuptime, the more available and better-performing the system)