You know that Active Directory supports multi-master updates of the directory between all the domain controllers in a domain.
However, because of replication traffic and the potential for conflicts in essential operations, it is not always practical to perform updates using multi-master replication.
For this reason, special server roles, such as global catalog and operations master, are assigned only to specific domain controllers.
For example, only one domain controller, called the operations master accepts requests for multi-master replication changes.
If a domain controller that is assigned a special role is not available, the specific functions of that role in Active Directory will not be accessible either.
There are three roles domain controllers can fill, and for this reason, we refer to three different types of domain controllers:
- domain controller
- global catalog server
- operations master
Each of these types of domain controller is listed in the Slide Show below.
We will describe each of these roles in more detail in upcoming lessons.
One of the first steps you are going to take when you deploy Active Directory is building domain controllers. Depending on the type of domain controller you are deploying and
how you implement the domain controller, the process may vary quite a bit.
You might want to deploy an RODC, or perhaps you want to use (IFM) Install from Media to lessen the replication load on the network and rapidly promote domain controllers. The process of converting
a member server to a domain controller is known as promotion.
In the next lesson, we will review each of the special roles for domain controllers in more detail.