Creating a Domain Design
The forest owner is responsible for creating a domain design for the forest. Creating a domain design involves examining the replication requirements and the existing capacity of your network infrastructure and then building a domain structure that enables Active Directory Domain Services (AD DS) to function in the most efficient way. Domains are used to partition the directory so that the information in the directory can be distributed and managed efficiently throughout the enterprise. The goal for your domain design is to maximize the efficiency of the Active Directory replication topology while ensuring that replication does not use too much available network bandwidth and does not interfere with the daily operation of your network.