NetBEUI (NetBIOS Extended User Interface) was originally developed as a protocol for small departmental LANs of 20 to 200 computers. NetBEUI is not routable since it doesn't have a network layer. NetBEUI is included with Windows 2000 Server and Windows 2000 Professional. It is primarily a legacy protocol to support existing workstations that have not been upgraded to Windows 2000.
For more information about NetBEUI, see "NetBEUI" in the Windows 2000 Internetworking Guide .