The Active Directory Installation Wizard creates a default site and a default site link when you install Active Directory Domain Services on the first domain controller in a site. The default site is named Default-First-Site-Name and the default site link is called DEFAULTIPSITELINK. You can rename the default site and site link as necessary. You must create subsequent sites and site links manually.
Configuring a site is a multipart process that includes the following steps:
Creating the site.
Creating one or more subnets and associating them with the site.
Associating a domain controller with the site.
Linking the site to other sites using site links, and if necessary, creating site link bridges.
I discuss these tasks in the sections ...