Consolidating windows domains
To gain a greater understanding of the times an organization might use this particular design model, let's look at the following AD structure.
City A is a local county governmental organization with a loose-knit network of semi-independent city offices such as the police and fire departments that are spread out around the city.
All trust relationships between the domains are transitive, and trusts flow from one domain to another.
“Windows Server 2008 mode” namespaces allow for domain-based namespaces of many thousands of DFS folders per namespace (look here for scalability test results).Each department currently uses a DNS namespace for name resolution to all hosts and user accounts local to itself, which provides different e-mail addresses for users located in the fire department, police department, and other branches.The following namespaces are used within the city's infrastructure: The decision was made to merge the existing network environments into a single Active Directory forest that will accommodate the existing departmental namespaces but maintain a common schema and forest root.Figure 5.6 Sample Active Directory forest with multiple unique trees within the same forest.Only one domain in this design is the forest root, in this case and the other domains that occupy different DNS structures, are members of the same forest.