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Difficulty: HardBusiness Continuity and Disaster Recovery

An enterprise financial organization is designing a disaster recovery strategy for its core transaction processing systems. The business impact analysis defines a Recovery Point Objective (RPO) of near-zero data loss (less than 5 seconds) and a Recovery Time Objective (RTO) of under 15 minutes. Additionally, production application servers must resume operational capacity automatically in the event of a primary data center facility outage. Which of the following technical controls and site recovery strategies should the network operations team combine to meet these stringent BCDR metrics? (Select TWO)

  1. Continuous Data Protection (CDP) for real-time transaction log journalingAnswer
  2. B
    Daily incremental backups transferred off-site via batch processing over an IPsec tunnel
  3. An Active-Active Hot Site architecture with synchronous storage replication and automated failoverAnswer
  4. D
    A Warm Site facility equipped with pre-staged server hardware and scheduled daily differential backups
  5. E
    A Cold Site lease paired with cloud-based bare-metal backup image archiving

Answer

To meet an RPO of near-zero data loss and an RTO of under 15 minutes, the organization must implement Continuous Data Protection (CDP) for real-time log journaling alongside an Active-Active Hot Site architecture with synchronous storage replication.
Continuous Data Protection (CDP) satisfies the near-zero RPO by journaling block-level storage modifications immediately as they occur. An Active-Active Hot Site fulfills the sub-15-minute RTO by maintaining live, fully mirrored computing systems capable of automatically handling application traffic if the primary facility fails.

Step-by-Step Solution

1
Analyze the RPO requirement
Near-zero RPO (under 5 seconds) mandates synchronous storage replication or Continuous Data Protection (CDP) that logs changes in real time rather than using periodic snapshot or scheduled incremental/differential backup jobs.
Scheduled backup methods (daily incremental or differential) leave gaps of hours during which lost data cannot be recovered.
2
Analyze the RTO and operational requirement
An RTO of under 15 minutes with automated recovery requires an Active-Active Hot Site.
Warm sites and cold sites require manual equipment provisioning, image restores, and service reconfigurations that take hours to weeks to complete.
3
Synthesize the complete BCDR architecture
Combining CDP for continuous data mirroring with an Active-Active Hot Site satisfies both the zero-data-loss RPO and rapid failover RTO constraints.
Only real-time replication coupled with live mirrored infrastructure can satisfy strict sub-minute recovery metrics.

Key Concept

Disaster Recovery Site Types and Replication Strategy Metrics (RPO/RTO)
Estimated Time:2m 0s
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Topics

Business Continuity and Disaster Recovery

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