When you have multiple content servers, you can use the Closest Server rules to determine from which content server a managed device receives its content. By associating content servers with locations, you can ensure that a device accesses the closest content server even when the device changes location. The Closest Server rules for a location let you map devices to content servers based on many network parameters (DNS names, IP addresses, Gateways, and so forth).
For more information, see Adding Closest Servers to Locations
in the ZENworks 11 SP4 Location Awareness Reference.