Final answer:
FortiOS workspace mode is a feature of the FortiGate firewall that organizes the administrative UI in a session-based way, allowing more granular control over configurations and reducing errors.
Step-by-step explanation:
The question 'What is FortiOS workspace mode?' refers to the FortiGate operating mode. In particular, FortiOS workspace mode is a feature that changes the way the FortiGate firewall's administrative user interface is organized. Instead of having a static device view, workspace mode provides administrators with a session-based approach, where changes can be made and then committed or discarded. This allows for more granular control and the ability to review changes before they are implemented system-wide. Workspace mode aims to enhance the management efficiency and reduce the likelihood of configuration errors.