# User Guide

## Domain

A domain is a logically related group of WebLogic Server resources that you manage 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 registry of active domains. A domain is considered active when it is capable of being evaluated. You select which domains to activate and evaluate.

#### Related Concepts

- Guardian Registry
- Evaluation
- Domain Inventory

#### Related Tasks

- Activate Domain
- Evaluate Domain
- Modify Domain
- Deactivate Domain

#### Related Reference

- Domain Explorer
- Active Domain Table
- Domain Inventory
- Domain Activation Wizard
- Domain Deactivation Wizard