An IaaS application has a two-hour RTO and four-hour RPO.
The application takes one hour to back up its data or restore from a local backup file.
A systems administrator is tasked with configuring the backup policy.
Which of the following should the administrator configure to achieve the application requirements with the LEAST cost?
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A. B. C. D.D.
To meet the RTO and RPO requirements with the least cost, the systems administrator needs to choose a backup strategy that ensures that data can be restored within two hours of an incident and data loss is limited to no more than four hours.
Option A suggests backing up to long-term storage every night. This strategy does not meet the RPO requirement, as the data loss could be as much as 24 hours if a failure occurred between backups. Additionally, restoring data from long-term storage may take longer than the RTO requirement.
Option B suggests backing up to object storage every three hours. This strategy meets the RPO requirement but may not meet the RTO requirement since it could take up to three hours to restore data in the event of an incident.
Option C suggests backing up to long-term storage every four hours. This strategy may not meet the RPO requirement, as the data loss could be as much as four hours if a failure occurred between backups. Additionally, restoring data from long-term storage may take longer than the RTO requirement.
Option D suggests backing up to object storage every hour. This strategy meets both the RTO and RPO requirements. Since the backup occurs every hour, the maximum data loss in case of failure would be an hour's worth of data. Additionally, restoring data from object storage should take less than the RTO requirement of two hours.
Therefore, Option D is the best choice for the administrator to configure the backup policy to achieve the application requirements with the least cost.