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CLF-C02 Practice Question 117: Disaster Recovery Service

AWS Certified Cloud Practitioner (CLF-C02) · Test 12 · question 7 of 10

Cloud Technology & Servicesmedium

A company runs critical applications on servers in its own data center and wants a disaster recovery site on AWS with minimal downtime and data loss. It wants ongoing replication into a low-cost staging area, the ability to launch recovery instances within minutes using the latest state or an earlier point in time, and the option to fail back to its data center later. Which service should it use?

Show answer and explanation

Answer:

C. AWS Elastic Disaster Recovery

AWS Elastic Disaster Recovery minimizes downtime and data loss with fast, reliable recovery of on-premises and cloud-based applications. It continuously replicates source servers into a staging area subnet in your AWS account that uses affordable storage and minimal compute. When needed, you launch recovery instances within minutes, using the most up-to-date server state or a previous point in time, and you can fail back to the primary site once the issue is resolved. It also supports non-disruptive recovery drills.

Option A takes backups on a schedule. Restoring whole servers from periodic backups is slower and loses the data written since the last backup, so it doesn't meet the minimal downtime and data loss goal. Option B also replicates servers continuously, but it is built for a *one-time migration* with a final cutover, not ongoing DR with drills and failback. Option D is low-cost archival storage with retrieval times of hours. It can't launch running recovery instances in minutes.

Reference: What is Elastic Disaster Recovery?

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