AWS Certified Solutions Architect Professional SAP-C02 Practice Question

Aurora Global Database uses storage-based replication that typically keeps secondary clusters within 1 second of the primary and can promote a secondary Region in less than 1 minute, satisfying the 1-minute RPO and the 5-minute RTO. AWS Elastic Disaster Recovery provides continuous block-level replication of the EC2 instances with an RPO measured in seconds and an RTO measured in minutes, so the application tier can also be recovered well within the required window. By pre-deploying a scaled-down ALB and Auto Scaling group in the secondary Region and using a Route 53 failover record that evaluates the primary ALB's target health, traffic switches automatically when the primary Region is unreachable. This combination achieves the objectives with very little day-to-day administration-the services handle replication and health monitoring automatically.

The cross-Region read-replica approach relies on asynchronous replication and manual promotion, so RPO can exceed 1 minute and failover actions increase RTO. Snapshot-based backup and restore cannot meet either the 5-minute RTO or 1-minute RPO. Running an active cluster replicated by scheduled AWS DMS tasks still leaves up to 15 minutes of data exposure and requires manual traffic steering, raising both RPO and operational overhead.