Module 27: Disaster Recovery Plan (DRP)

What the Exam Is Really Testing

The exam is not looking for textbook recall. It wants to know if you understand:

The Disaster Recovery Plan restores IT systems in alignment with business-defined recovery objectives.

DRP focuses on:

• Technical recovery
• Infrastructure restoration
• Data recovery
• System prioritization
• Meeting RTO and RPO

DRP must align directly with BIA outcomes.

The Executive Mindset Shift

Standard operating procedure:

Restore systems as quickly as possible.

Leadership standard:

Restore systems in order of business-defined criticality.

Security leaders must ensure:

• RTO and RPO guide recovery sequencing
• Recovery procedures are documented
• Backup strategies support RPO
• Alternate infrastructure is defined
• Testing validates technical recovery capability

DRP execution must be structured — not reactive.

Core DRP Components

1. Recovery Objectives

Defined by BIA:

• RTO – Maximum acceptable downtime
• RPO – Maximum acceptable data loss

These drive:

• Backup frequency
• Redundancy architecture
• Replication strategies

2. Recovery Strategies

May include:

• Hot site
• Warm site
• Cold site
• Cloud failover
• Data replication
• Alternate processing locations

Strategy must reflect risk appetite and cost-benefit.

3. Roles and Responsibilities

Define:

• DR coordinator
• Technical recovery teams
• Infrastructure leads
• Vendor contacts
• Executive oversight

Clear ownership reduces recovery confusion.

4. Data Backup and Restoration

Backup strategy must align with RPO.

Consider:

• Backup frequency
• Offsite storage
• Encryption of backups
• Testing restoration capability
• Immutable backups (ransomware resilience)

Backups without restoration testing create false assurance.

5. Testing and Maintenance

DRP must be:

• Tested periodically
• Validated against RTO/RPO
• Updated after infrastructure changes
• Reviewed after incidents
• Integrated with change management

Testing validates technical readiness.

DRP vs BCP (Exam Reminder)

• BCP → Keep business operating.
• DRP → Restore IT systems.
• IRP → Manage and contain incidents.

CISM often tests confusion between these.

Governance Integration

DRP must align with:

• BIA results
• BCP continuity strategies
• Incident response plan
• Enterprise risk management
• Regulatory requirements

DRP is part of enterprise resilience strategy.

Pattern Recognition

When DRP appears in a scenario, ask:

1. Are RTO/RPO defined?
2. Does recovery strategy align with business impact?
3. Is backup frequency aligned with RPO?
4. Has the plan been tested?
5. Are roles clearly defined?

Correct answers often involve:

• Aligning recovery sequencing with BIA
• Testing restoration capability
• Updating plan after system changes
• Ensuring backup integrity
• Conducting simulation exercises

Not:

• Restoring systems arbitrarily
• Focusing only on containment
• Assuming backups work without testing
• Ignoring cost-benefit analysis

Trap Pattern

Common wrong instincts:

• “BCP and DRP are interchangeable.”
• “Backup equals recovery.”
• “Testing is optional.”
• “Recover everything immediately.”

CISM emphasizes structured, prioritized recovery.

Scenario Practice

Question 1

A critical system fails, and technical teams restore a low-priority system first.

What is the MOST likely root cause?

1. Misalignment with BIA-defined recovery priorities
2. Encryption weakness
3. Vendor inefficiency
4. Monitoring delay

Question 2

An organization performs daily backups but has never tested restoration.

What is the PRIMARY risk?

1. Reduced automation
2. Vendor inefficiency
3. Encryption gap
4. Inability to validate recovery capability

Question 3

RPO is defined as 1 hour, but backups occur once daily.

What is the PRIMARY issue?

1. Reduced automation
2. Encryption deficiency
3. Backup strategy misaligned with recovery objective
4. Vendor oversight

Question 4

The DRP has not been updated after major cloud migration.

What is the MOST significant risk?

1. Reduced automation
2. Recovery procedures no longer reflect infrastructure reality
3. Encryption gap
4. Vendor inefficiency

Question 5

Executive leadership questions the need for redundant infrastructure.

What is the MOST appropriate justification?

1. Alignment with RTO/RPO defined in BIA
2. Vendor recommendation
3. Increased monitoring
4. Firewall upgrades

Key Takeaway

In CISM:

BIA defines priorities. BCP preserves operations. DRP restores systems.

An effective DRP:

• Aligns with RTO and RPO.
• Prioritizes systems based on business impact.
• Defines recovery strategies clearly.
• Tests restoration regularly.
• Updates with infrastructure changes.
• Integrates into enterprise governance.

Maturity here is measured by validated recovery capability, not backup schedules.