This article describes new terms and design considerations, and provides a simple example, for configuring sites in your organization. Similarly, the domain, or logical structure, is defined separately from the site structure. Although the domain, site, and physical structures are defined and configured independently from each other, they have interdependencies that affect replication. Description of a Site A site is a collection of one or more subnets that are defined by the administrator.
Sites can contain multiple domains, and a domain can span more than one site.
When you install a domain controller as the first domain controller in a forest, a new site is created by default. You can also create other sites. To achieve bidirectional replication, first define two unidirectional connection objects. The KCC periodically creates connections to maintain directory connectivity without manual intervention. However, you can manually create connections.