When you run a Network Discovery, why are many of my computers showing up as "Unknown" instead of as computers?
Computers usually show up as "unknown" unless SNMP is enabled as a service. In general, this is not enabled, but can be added. For instance, use the following for SOME versions of windows:
To install SNMP on Windows XP, 2000, and 2003:
You must be logged on as an administrator or a member of the Administrators group to complete this procedure. If your computer is connected to a network, network policy settings may also prevent you from completing this procedure.
Click Start, point to Settings, click Control Panel, double-click Add or Remove Programs, and then click Add/Remove Windows Components.
In Components, click Management and Monitoring Tools (but do not select or clear its check box), and then click Details.
Select the Simple Network Management Protocol check box, and click OK.
Insert the respective CD or specify the complete path of the location at which the files stored.
SNMP starts automatically after installation.
Note: Simply installing SNMP from Windows Components doesn't configure it. Until SNMP has been configured, Network Discovery will not be able to discover the device. Please refer to the following Microsoft article as it explains how to configure SNMP: http://support.microsoft.com/kb/324263