Determining Site Cost
An AD replication mechanism allows designers and administrators to establish preferred routes for replication to follow. This mechanism is known as site cost, and every site link in AD DS has a cost associated with it. The concept of site cost, which might be familiar to many administrators, follows a fairly simple formula. The lowest-cost site link becomes the preferred site link for communications to a site. Higher-cost site links are established mainly for redundancy or to reduce traffic on a specific segment. In this way, administrators can “shape” the flow of traffic between and among sites. Figure 7.5 illustrates a sample AD site structure that utilizes different costs on specific site links.
Figure 7.5. Understanding ...
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