Mastering Active Directory

Regional domain model

In the regional model, the AD DS forest will contain the forest root domain and multiple domains that are connected via wide area networks (WANs). This is mainly applicable to branch offices and sub-companies located in different geographical locations:

This model is complex to implement compared to the single domain model and will require additional hardware and resources. In this model, the domain partition data will be replicated only to the domain controllers inside the domain, and it will allow you to reduce the replication traffic flow between WAN links. This model will also help isolate the security requirements. ...