When does a playbook task begin execution?

The correct answer indicates that a playbook task begins execution when the playbook is triggered and continues until all tasks have been completed. This aligns with the operational design of automation within FortiAnalyzer and similar systems, where playbooks serve to streamline incident response and management processes.

When a playbook is initiated, it runs through a series of predefined tasks in sequence or simultaneously, depending on the playbook configuration. The idea is to automate responses to security events, ensuring that all elements of the response are executed as intended without manual intervention after the initial trigger. Thus, the playbook's execution is tied to its trigger event and only concludes when all associated tasks have been fulfilled, ensuring complete and thorough automation of incident response. This approach helps minimize human error and enhances response efficiency.

In contrast, options like manual triggers, predetermined schedules, or incident detection alone imply a limited or different context of task initiation, which does not encompass the full range of execution defined by the playbook design.