Exam SK0-005 topic 1 question 187 discussion

The guarantee of the amount of time it will take to restore a downed service is typically referred to as the "RTO" or "Recovery Time Objective." RTO is the amount of time within which a system, application, or service must be restored after a disruption in order to avoid unacceptable consequences associated with a break in business continuity. Option A, RTO, is the correct answer. Option B, SLA (Service Level Agreement), is an agreement between a service provider and its customers that defines the level of service, availability, and other aspects of the service that the provider agrees to deliver. Option C, MTBF (Mean Time Between Failures), is the average time that elapses between failures of a system, component, or product. Option D, MTTR (Mean Time To Repair), is the average time it takes to repair a system, component, or product after a failure has occurred.

Going with (B), a Service Level Agreement (SLA) is a set definitive contract of expectations between provider and customer that "guarantees" recovery times in the event of a disaster. * An RTO is more of an internal target for the service provider.

D. MTTR (Mean Time To Restore) A. RTO (Recovery Time Objective) refers to the targeted duration within which a service or system must be restored after a disaster or failure, but it doesn't specifically quantify the actual time it takes to restore the service. B. SLA (Service Level Agreement) is a contract between a service provider and a customer, specifying the level of service to be provided, but it may include various metrics beyond just restoration time. C. MTBF (Mean Time Between Failures) represents the average time elapsed between failures of a system or component, which is different from the time taken to restore the service after a failure. ***D. MTTR represents the average time it takes to repair a failed system or component and restore it to normal operation. It's an important metric in understanding the reliability and maintainability of a system.