ISC2 Systems Security Certified Practitioner (SSCP) Practice Question
Your healthcare company runs a patient portal on AWS in one Region across two Availability Zones. A business impact analysis sets an RTO of 4 hours and an RPO of 15 minutes for a Regional outage. Leadership wants the lowest possible steady-state cost, accepting higher spend only during an actual disaster. Which AWS disaster-recovery approach best meets these requirements?
Maintain a warm-standby environment by running a downsized but fully functional copy of the application in another Region at all times
Deploy a multi-Region active-active architecture using Route 53 latency-based routing for immediate failover
Use cross-Region Amazon S3 backups and rebuild the entire environment after an incident with infrastructure-as-code
Implement a pilot-light strategy with continuous database replication and automate scaling of application servers in a secondary Region during a disaster
A pilot-light strategy continuously replicates only the critical data stores-typically the application databases-to a secondary Region, keeping ongoing costs low while maintaining recent data within the 15-minute RPO. If the primary Region fails, infrastructure-as-code templates and automated scaling policies can launch and scale application servers, networking, and supporting services in the standby Region, bringing the workload online well within the 4-hour RTO.
A multi-Region active-active design also meets the objectives but incurs high steady-state costs by running fully sized resources in two Regions at all times. Warm standby runs a constant, downsized version of the full workload, costing more than pilot light. Backup-and-restore provisions everything only after a failure, making it unlikely to achieve either the 15-minute RPO or the 4-hour RTO.
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ISC2 Systems Security Certified Practitioner (SSCP)
Incident Response and Recovery
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