Bridgehead servers
In the Active Directory infrastructure, the Knowledge Consistency Checker (KCC) is an in-built process which runs on domain controllers and it is responsible for generating replication topology. It will configure the replication connection between domain controllers. When it comes to replication between sites, KCC selects a domain controller as a bridgehead server, which will send and receive replication traffic for its site. If you have multiple domains in multiple sites, each domain should have its own bridgehead server. A site can have multiple bridgehead servers for same domain, but at a given time, only one will be active. It is decided based on the domain controller's lowest GUID value. In the Active Directory environment, ...
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