Definition
Incident and Event Response (IR) is the systematic process organizations use to detect, analyze, and react to cybersecurity threats and breaches. It involves establishing clear procedures for identifying potential security events, containing ongoing incidents, eradicating threats, and recovering affected systems. This structured approach is crucial for minimizing damage, reducing downtime, and restoring normal operations quickly after a security compromise. For instance, an IR plan might dictate immediate network isolation upon detecting ransomware activity. While often confused with simple monitoring, IR is a proactive and reactive framework encompassing the entire lifecycle of a security incident. This critical domain is thoroughly covered in certifications like CompTIA Security+, CySA+, and CISSP.