AWS Certified Solutions Architect Professional SAP-C02 Practice Question

AWS Global Accelerator provides two static anycast IP addresses and continuously probes the health of each regional endpoint. If the ALB in us-east-1 becomes unhealthy, Global Accelerator removes it from service and starts directing new connections to the healthy ALB in us-west-2 in approximately 30 seconds, eliminating dependence on DNS TTL expiration. Aurora Global Database replicates changes across Regions with typical latency below 1 second and, with the managed cross-Region failover feature, can promote the secondary cluster to the writer role in under a minute. Together, these services meet the RPO of less than 1 second and an RTO of under 60 seconds, satisfying the business continuity targets while requiring only minimal configuration.

The weighted Route 53 design still depends on DNS caching and manual weight adjustments, so traffic might continue to flow to an unhealthy Region for longer than the RTO. AWS Elastic Disaster Recovery must boot new instances, which takes minutes and breaches the RTO. Re-architecting around DynamoDB global tables would meet cross-Region data durability but would not preserve the existing Aurora workload and would add significant development and operational effort.