Disaster Recovery
The plans and procedures for restoring services and data after a major outage or disaster.
Disaster recovery (DR) is the documented set of plans, procedures, and infrastructure for restoring network services and data after a catastrophic failure, natural disaster, or major cyberattack. DR planning identifies backup sites — hot (fully operational and ready), warm (partially equipped), and cold (space only) — and assigns clear responsibilities so restoration proceeds without guesswork. The key exam distinction is RTO (Recovery Time Objective), the maximum acceptable downtime, versus RPO (Recovery Point Objective), the maximum acceptable data loss measured backward from the failure. DR governs both, while high availability focuses on preventing the outage in the first place — a common N10-009 trap.
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