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Windows NT Server Domain Models

A domain model is a group of one or more domains arranged for user and resource management.

There are three Windows NT Server domain models:

It is important to choose a domain model carefully or to study the existing one. If a domain already exists, find out how it is structured, how trust relationships are set up, why that model was chosen, and where the domain controllers are located. You need to incorporate this information into your organization plan.

The model you choose depends on your administrative resources and the network size. A single domain can handle up to 40,000 user accounts, and multiple master domains can handle more than 100,000 users.