ISC2 Certified Cloud Security Professional (CCSP) Practice Question
Your company hosts a mission-critical Linux application on an IaaS VM. Management requires an RPO of 15 minutes, application-consistent backups without shutting the VM down, minimal cloud egress costs, and the ability to restore individual files. Which backup design satisfies all requirements?
Deploy an in-guest backup agent that performs continuous changed-block incremental backups to object storage in the same region, creating application-consistent restore points every 15 minutes.
Schedule nightly full image snapshots of the VM's virtual disk using the provider's snapshot service.
Enable hypervisor-level crash-consistent snapshots every 15 minutes and replicate them to a secondary region for redundancy.
Run a cron-based rsync script that copies the /var directory to an on-premises NAS over a site-to-site VPN.
An in-guest backup agent that leverages changed-block tracking can quiesce the file system and application, producing application-consistent backups while the VM continues running. By storing frequent incremental copies (every 15 minutes) in object storage located in the same cloud region, the solution meets the tight RPO and avoids outbound data-transfer fees. Because the agent backs up at the file level, individual files such as log entries can be restored without recovering the whole image. Nightly image snapshots exceed the 15-minute RPO. Hypervisor crash-consistent snapshots may not protect in-memory transactions and cross-region replication adds egress cost and latency. A basic rsync job neither guarantees application consistency nor avoids egress charges to the on-premises NAS.
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ISC2 Certified Cloud Security Professional (CCSP)
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