問題文
A payment processor states that after a disruption its ledger must be back in service within four hours, and that it can afford to lose at most fifteen minutes of transactions. Which pairing of these two figures with their names is correct?
選択肢
- Both figures are recovery time objectives, one for the ledger service itself and one for the database that sits behind it so the shorter figure applies to the component that the processor considers to be the more critical of the two.
- Four hours is the maximum tolerable downtime and fifteen minutes is the recovery time objective, which means the processor has allowed itself three hours and forty-five minutes of slack in its plan.
- Four hours is the recovery point objective and fifteen minutes is the recovery time objective, because the larger of the two figures always describes the span of data that an organization is prepared to lose in a disruption.
- Four hours is the recovery time objective because it states when the service has to be usable again and fifteen minutes is the recovery point objective, because it states how much data may be lost.