Containment measures are the immediate actions taken by cybersecurity professionals to limit the spread and impact of a security incident, such as a malware infection or data breach. These measures aim to isolate affected systems, prevent further unauthorized access, and stop the attack from propagating to other parts of the network. Common containment strategies include disconnecting compromised devices, blocking malicious network traffic, disabling user accounts, and applying temporary security patches. Effective containment is crucial for minimizing damage, preserving evidence for forensic analysis, and buying time to develop a comprehensive recovery plan. It is a critical phase in the incident response process.