Which stage of an incident response plan focuses on obtaining and preserving evidence?

The stage of an incident response plan that focuses on obtaining and preserving evidence is the containment phase. During this stage, the primary goal is to stop the spread of the incident and to contain it while also ensuring that any evidence related to the incident is preserved for future investigation and analysis. This involves taking steps to secure affected systems and data to prevent further damage or loss while maintaining the integrity of the evidence.

In this phase, actions such as isolating compromised systems, collecting logs, and securing artifacts relevant to the incident are performed. This is crucial because preserving evidence is essential for understanding the incident's cause, its impact, and for any potential legal or regulatory actions that may follow.

The other options refer to different stages that have distinct objectives. Investigation focuses on analyzing the incident after containment is achieved, while detection and analysis emphasize identifying and understanding breaches as they occur. Lastly, post-incident analysis reviews the entire incident response process after resolution to improve future responses but does not specifically prioritize the preservation of evidence.