### Domain

A domain is a logically related group of WebLogic Server resources that are managed as a unit. A domain always includes at least one WebLogic Server instance called the Administration Server. The Administration Server acts as a central point of contact for server instances and system administration tools. A domain may also include additional WebLogic Server instances called Managed Servers.

Each BEA Guardian installation maintains a Guardian Registry of active domains. A domain is considered active when it is capable of being evaluated. You can activate and deactivate domains at will, and select which to evaluate at any given time.