AWS Certified SysOps Administrator – AssociateReliability and Business ContinuityMedium
A company operates a critical application on Amazon EC2 instances in a single AWS Region. To improve the application's resilience and minimize downtime during a regional outage, they decide to implement a multi-region active-passive disaster recovery strategy. They need a cost-effective solution that allows for quick failover to a secondary region. Which AWS service should they use to manage the global routing of traffic to either the primary or secondary region based on the health of the application endpoints?
- AAWS Global Accelerator
- BAWS Transit Gateway
- CAmazon Route 53 Resolver
- DAmazon CloudFront
Show answer & explanationAnswer & explanation
Correct answer: A. AWS Global Accelerator
AWS Global Accelerator is designed to improve application availability and performance by directing user traffic to the nearest healthy endpoint across multiple AWS regions. It uses static IP addresses as a fixed entry point and continuously monitors the health of application endpoints, automatically routing traffic away from unhealthy ones.
Why the other options are wrong
- B. AWS Transit Gateway simplifies network connectivity between VPCs and on-premises networks, but it doesn't manage global traffic routing for disaster recovery scenarios.
- C. Amazon Route 53 Resolver is used for DNS resolution within and between VPCs and on-premises networks, not for global traffic management based on health checks.
- D. Amazon CloudFront is a content delivery network (CDN) primarily used for caching static and dynamic content closer to users, not for global traffic management for application availability.
AWS Global Accelerator for DR
AWS Global Accelerator uses static IP addresses and intelligent routing to direct user traffic to the nearest healthy application endpoint across multiple AWS regions, enhancing availability and performance.
- Provides static IP addresses as fixed entry points.
- Continuously monitors health of application endpoints.
- Automatically reroutes traffic away from unhealthy endpoints.
- Ideal for active-passive multi-region disaster recovery.
Memory trick: Global Accelerator: The traffic cop for your global apps, always finding a healthy route.