Which metric describes the maximum tolerable data loss in a disaster recovery scenario where data at the DR site must not be more than 24 hours old?

Which metric describes the maximum tolerable data loss in a disaster recovery scenario where data at the DR site must not be more than 24 hours old?

• A. RTO
• B. MTBF
• C. MTTR
• D. RPO

Answer: (D)

RPO is the maximum amount of data an organization can afford to lose in a disaster, expressed as a time window between the last good copy and the point of disruption. If the data at the DR site must not be more than 24 hours old, the RPO is 24 hours. This drives how often backups or replications occur—you’d implement backups or replication at least every 24 hours to keep data within that tolerance. RPO focuses on data loss, while RTO deals with how long it takes to restore service after a disruption, and MTBF/MTTR relate to failure frequency and repair time, not data loss.

RPO is the maximum amount of data an organization can afford to lose in a disaster, expressed as a time window between the last good copy and the point of disruption. If the data at the DR site must not be more than 24 hours old, the RPO is 24 hours. This drives how often backups or replications occur—you’d implement backups or replication at least every 24 hours to keep data within that tolerance. RPO focuses on data loss, while RTO deals with how long it takes to restore service after a disruption, and MTBF/MTTR relate to failure frequency and repair time, not data loss.