CompTIA Cloud+ (CV0-004)Cloud ArchitectureHard
A cloud administrator is tasked with ensuring an application remains operational even if an entire cloud region experiences an outage. The Recovery Time Objective (RTO) for this application is 4 hours, and the Recovery Point Objective (RPO) is 1 hour. Which high availability strategy is most appropriate?
- ASingle Availability Zone deployment with automated backups
- BMulti-Region active/active deployment with synchronous replication
- CMulti-Availability Zone deployment with synchronous replication
- DMulti-Region active/passive deployment with asynchronous replication
Show answer & explanationAnswer & explanation
Correct answer: D. Multi-Region active/passive deployment with asynchronous replication
A multi-region active/passive deployment with asynchronous replication allows for recovery from a regional outage. Asynchronous replication provides an RPO greater than zero (e.g., 1 hour), and an active/passive setup can meet an RTO of 4 hours as it involves bringing up resources in the passive region.
Why the other options are wrong
- A. A single AZ deployment does not protect against a regional outage.
- B. Synchronous replication across regions is generally not feasible due to latency, and active/active might be overkill/too complex for the given RTO/RPO.
- C. Multi-AZ protects against AZ failures, not regional outages. Synchronous replication across regions is usually impractical.
Multi-Region Active/Passive DR
A disaster recovery strategy where an application runs in one region (active) and a replica is maintained in another region (passive), ready for failover in case of a regional outage.
- Protects against entire regional failures.
- Typically uses asynchronous replication for data consistency.
- Associated with RPO > 0 and RTO in minutes to hours.
Memory trick: To survive a 'Regional' 'Outage' with some 'RPO' and 'RTO', go 'Multi-Region Active/Passive'.