Explain the lifecycle of an Incident Response process?

Incident response follows a defined lifecycle so that a security event is handled consistently and nothing critical gets missed under pressure.

1. Preparation: building playbooks, tooling, and training before an incident ever happens
2. Identification: detecting and confirming that an actual security incident is underway
3. Containment: isolating affected systems to stop the incident from spreading further, often split into short-term and long-term containment
4. Eradication: removing the root cause, such as malware or a compromised account
5. Recovery: restoring systems to normal operation and monitoring closely for signs of reinfection
6. Lessons Learned: a post-incident review to document what happened and improve future response

Skipping straight to eradication without proper containment is a common mistake, since it can tip off the attacker and destroy forensic evidence needed to understand the full scope of the breach.

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