How does RPO differ from RTO?

How does RPO differ from RTO?

• A. RPO is the time to recover operations; RTO is data loss window.
• B. RPO is the maximum acceptable data loss measured in time; RTO is the allowed downtime duration.
• C. RPO is the time to detect a failure; RTO is uptime percentage.
• D. RPO is maintenance window length; RTO is backup frequency.

Answer: (B)

RPO tells you how much data you’re willing to lose in a disruption, expressed as a time window. If the RPO is 15 minutes, you must have backups or replication so that only the last 15 minutes of activity could be lost. RTO tells you how quickly you must be back in operation after a disruption—the maximum downtime you can tolerate. If the RTO is 2 hours, you need recovery processes that restore services within two hours. Together, these metrics shape both how often you back up (to meet the RPO) and how fast you can fail over and restore (to meet the RTO). The other options mix up these ideas or assign unrelated meanings: RPO isn’t the time to recover operations, nor is RTO a data loss window; it isn’t about failure-detection time or uptime percentage; and it isn’t about maintenance windows or backup frequency in those terms.

RPO tells you how much data you’re willing to lose in a disruption, expressed as a time window. If the RPO is 15 minutes, you must have backups or replication so that only the last 15 minutes of activity could be lost. RTO tells you how quickly you must be back in operation after a disruption—the maximum downtime you can tolerate. If the RTO is 2 hours, you need recovery processes that restore services within two hours. Together, these metrics shape both how often you back up (to meet the RPO) and how fast you can fail over and restore (to meet the RTO). The other options mix up these ideas or assign unrelated meanings: RPO isn’t the time to recover operations, nor is RTO a data loss window; it isn’t about failure-detection time or uptime percentage; and it isn’t about maintenance windows or backup frequency in those terms.