Definition
Disaster recovery, often abbreviated as DR, is a comprehensive plan and set of procedures designed to help an organization quickly resume operations after a disruptive event. It outlines the steps necessary to restore critical IT infrastructure, applications, and data, ensuring business continuity. DR typically involves establishing redundant systems, regular data backups, and a defined recovery time objective (RTO) and recovery point objective (RPO). This process is crucial for minimizing financial losses, maintaining customer trust, and protecting an organization's reputation. For instance, a company might use cloud-based backups to restore its e-commerce website within hours following a hardware failure. Disaster recovery differs from business continuity, which is a broader strategy encompassing all aspects of maintaining operations, whereas DR focuses specifically on IT systems. Knowledge of disaster recovery principles is essential for cybersecurity certifications like CompTIA Security+ and CySA+.