Which of the following is a containment strategy?

The selection of shutting down a service as a containment strategy is rooted in its purpose of preventing further damage during an incident. Containment strategies are essential in incident management to limit the scope and impact of a security breach or other incident. By shutting down a service, you effectively isolate it from the network or other systems, which helps prevent the spread of malware, data exfiltration, or further exploitation of vulnerabilities. This immediate action allows the incident response team to work on the problem without the added risk of escalation or further compromise.

In incidents where immediate action is required to avoid greater damage, shutting down services ensures that threats are curtailed while a more thorough investigation and response can take place. This hasty severance also helps protect any potentially vulnerable interconnected systems, thus maintaining some level of security integrity until the situation is resolved.

Alternative responses, such as rebuilding systems from original media, monitoring network traffic, or creating backup copies, while important in the overall incident management process, do not fit the specific criteria of a containment strategy as effectively. Rebuilding systems is more aligned with the recovery phase, monitoring is important for detection and analysis, and backups are part of preventative measures rather than immediate containment actions.