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What backups every 4 hours mean

A system is backed up every 4 hours and has no other replication. If it fails just before the next backup, how much data could be lost, and which target is this?

A.Up to 4 hours; this is the recovery time objective (RTO)B.Nothing, since backups prevent all lossC.Up to 4 hours; this is the recovery point objective (RPO)D.Up to 24 hours; this is the service level agreement

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What backups every 4 hours mean

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