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IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/256986/EN-US/ )Description of the Microsoft Windows Registry
Systems Management Server (SMS) clients use existing connections from the Client Access Points (CAPs) and Distribution Points (DPs) designated in their site by default. If no existing connection exists, clients randomly select from the CAP/DP list for their site. Sites are defined by local or fast network connectivity, ensuring load balancing across all CAPs and DPs in the site.
In some situations, a site may manage a handful of clients across a slow link. Although this is not a recommended configuration, there are provisions in the SMS 2.0 architecture to force a client to use a specific CAP or DP. When you consider an implementation where specific clients have a designated CAP or DP, keep in mind that clients that do not explicitly have a preferred CAP or DP identified, select their servers randomly. In other words, if a CAP or DP is available over a slow link, it still may be chosen by a local client that does not have designated preferred servers. Defining a site that includes wide area subnets is not recommended as it negates the SMS 2.0 architecture.
For more information about site boundaries and hierarchy configuration, refer to Chapter 3 (Planning for SMS in Your Organization) and Chapter 9 (Discovering Resources and Installing Clients) in the Microsoft Systems Management Server 2.0 Administrator's Guide.
Clients can use the following three methods to determine which CAP or DP to use (listed in order of attempted use):
(http://support.microsoft.com/kb/226115/EN-US/ )SMS: Preferred Distribution Point Selection Requires Full Package Path
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