ISC2 Systems Security Certified Practitioner (SSCP) Practice Question
During a business impact analysis for a regional retailer, you determine that if the inventory-management system is unavailable longer than eight hours, stores cannot accept deliveries and the resulting financial loss becomes unrecoverable. The recovery design includes a warm standby that can be activated within six hours and transaction logs are backed up every 15 minutes. Which restoration-planning metric is represented by the eight-hour threshold?
The eight-hour threshold defines the maximum tolerable downtime (MTD)-the longest period the business can withstand a service interruption before unacceptable harm occurs. MTD sets the upper boundary that guides recovery strategies. The recovery time objective (RTO) is the targeted time to return the system to operation (six hours in the scenario). The recovery point objective (RPO) concerns data loss tolerance (15-minute backups here). Work recovery time (WRT) is the additional time needed to validate data and restore normal operations after systems are online. Because the question asks for the point at which business loss becomes unrecoverable, only MTD applies.
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What is Maximum Tolerable Downtime (MTD)?
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How is Recovery Time Objective (RTO) different from MTD?
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What is the role of Recovery Point Objective (RPO) in restoration planning?
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ISC2 Systems Security Certified Practitioner (SSCP)
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