📖 What is Disaster Recovery Plan (DRP)?
A Disaster Recovery Plan (DRP) details the technical processes and resources required to restore IT infrastructure, data, and applications following a disruptive event. It focuses on recovery time objectives (RTOs) and recovery point objectives (RPOs) to minimize data loss and system downtime.
"The DRP is a component of the overall BCP. Exam questions frequently test understanding of RTO and RPO calculations and their impact on business operations. Be prepared to analyze scenarios and select appropriate recovery strategies based on these objectives."
📚 Certification: Certified Information Systems Auditor (CISA)
🔑 What are the Key Concepts of Disaster Recovery Plan (DRP)?
- ▸ DRPs prioritize restoring critical business functions, not necessarily all systems, based on business impact analysis (BIA) results.
- ▸ RTO (Recovery Time Objective) defines the maximum acceptable downtime for a system or process after a disaster occurs.
- ▸ RPO (Recovery Point Objective) determines the maximum acceptable data loss measured in time – how far back in time data can be restored.
- ▸ A DRP should include detailed procedures for data backup, system recovery, communication plans, and testing/maintenance schedules.
- ▸ Regular testing (tabletop exercises, simulations) is crucial to validate the DRP's effectiveness and identify areas for improvement.
🎯 How does Disaster Recovery Plan (DRP) appear on the CISA Exam?
You may be asked to analyze a business impact analysis report and determine the appropriate RTO and RPO for a critical financial application.
A scenario might describe a ransomware attack; expect questions about which DRP procedures would be activated to restore systems and data.
Expect questions about the differences between a DRP, a Business Continuity Plan (BCP), and an Incident Response Plan (IRP) and their respective scopes.
❓ Frequently Asked Questions
How do RTO and RPO influence the cost of a DRP?
Shorter RTOs and RPOs generally require more expensive solutions like real-time replication and hot sites, increasing overall DRP costs. Longer objectives allow for cheaper, less frequent backups.
What's the role of documentation in a successful DRP?
Comprehensive documentation is vital. It includes system configurations, recovery procedures, contact lists, and vendor information, ensuring a smooth and efficient recovery process.
Is a DRP a one-time project, or does it require ongoing maintenance?
A DRP is not static. It requires regular updates to reflect changes in IT infrastructure, business processes, and threat landscape. Annual reviews and testing are essential.