Exam CS0-004 Topic 1 Question 56 Discussion

Triage occurs during the analysis phase because responders must determine what an alert represents, how serious it is, which assets are affected, and what response priority should be assigned before taking broader containment or recovery actions.
Triage typically involves validating the alert, gathering supporting telemetry, establishing whether the event is a true positive, determining scope and impact, identifying affected identities or systems, correlating indicators, and assigning severity. The outcome provides the evidence required to decide whether an event should be escalated into formal incident handling and what subsequent actions are justified. NIST incident- handling guidance has historically emphasized analyzing incident-related information in order to determine the appropriate response, while the current NIST framework continues to emphasize efficient incident detection, response, and recovery.
Isolation belongs to containment because it restricts the compromised asset's ability to communicate or spread malicious activity. Reimaging normally occurs during recovery after the environment has been contained and malicious persistence addressed. Alert writing is part of detection engineering or security- monitoring operations rather than a defining incident-analysis activity.
The sequence is therefore important: detect # analyze/triage # contain # eradicate # recover # conduct post-incident activities .
Study Guide Reference: Incident Response and Management # Incident Response Process # Detection # Analysis/Triage # Containment # Eradication # Recovery.