CompTIA Cloud Essentials+ (CLO-002)Cloud ConceptsMedium
A cloud customer is implementing a disaster recovery strategy for their mission-critical application. The strategy involves deploying the application across multiple cloud regions, with data replicated synchronously between them, to ensure continuous operation even if an entire region becomes unavailable. Which availability strategy is being employed?
- ASingle-Region Multi-AZ
- BMulti-Region Active-Passive
- CRegional Disaster Recovery Site
- DMulti-Region Active-Active
Show answer & explanationAnswer & explanation
Correct answer: D. Multi-Region Active-Active
Multi-Region Active-Active deployment involves running the application concurrently in multiple cloud regions, with all regions actively serving traffic. Synchronous data replication ensures data consistency, and this setup provides the highest level of availability and resilience against regional outages.
Why the other options are wrong
- A. Single-Region Multi-AZ protects against failures within a single region, but not an entire region outage.
- B. Active-passive means one region is primary and the other is a standby, not serving traffic until a failover.
- C. A Regional Disaster Recovery Site could be active-passive, but 'active-active' specifically denotes concurrent operation and traffic serving across regions.
Multi-Region Active-Active
A high availability and disaster recovery strategy where an application is deployed and actively serves traffic from multiple cloud regions simultaneously, with data replicated between them.
- Highest level of availability and resilience.
- All regions handle live traffic.
- Requires complex data synchronization (often synchronous).
Memory trick: Availability: Active-Active means always on, everywhere.