Chapter 21. Adding More Locations: Sites in Active Directory
If all your domain controllers are located in a single physical location, you can skip this chapter. However, if you have some domain controllers that aren't in the same location, you'll need to teach Active Directory about the wide area network (WAN) links connecting the different locations.
Active Directory uses sites to identify different locations. However, Active Directory knows about only one site by default. This default first site is named Default-First-Site-Name. If your organization is in a single location, everything will work as expected without problems.
However, if you have more than one site, you will need to create additional sites, subnets, and site links. The sites represent ...