The MARS Global Controller is a security threat mitigation (STM) appliance. Once you deploy multiple Local Controllers, you can deploy a Global Controller that summarizes the findings of two or more Local Controllers. In this way, the Global Controller enables you to scale your network monitoring without increasing the management burden. The Global Controller provides a single user interface for defining new device types, inspection rules, and queries, and it enables you to manage Local Controllers under its control. This management includes defining administrative accounts and performing remote, distributed upgrades of the Local Controllers.