NetBEUI and Windows 2000
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From Windows 2000 Server Professional Reference, by Karanjit S. Siyan, PhD., New Riders.
There are several differences in Windows 2000 Server from its predecessor, NT 4.0. This excerpt describes changes in the NetBEUI protocol.
The NetBEUI protocol is adequate for a single LAN solution without routers, consisting of a small number of workstations. In the first release of Windows NT version 3.1, the NetBEUI protocol was the native protocol stack. In a subsequent release (Windows NT 3.5), the IPX /SPX protocols were promoted to equal status with NetBEUI. In Windows 2000 Server and Workstation, when the setup program asks you to select the protocol, the NWLink TCP/IP choice is now checked by default. You must explicitly enable the other protocol choices.
The Windows 2000 implementation of NetBEUI contains some extensions over the previous NetBEUI designed by Microsoft, IBM and Intel Corporation, and it is referred to in the Windows 2000 documentation by NetBIOS Frame (NBF). NetBIOS had a limit of 254 communications sessions (connections) per node on the network, regardless of whether the node was a workstation or server. NBF removes the limit of 254 connections per computer and permits each process in the Windows 2000 computer to communicate with as many as 254 other nodes on the network. The actual limit is 254 computers per LAN Affinity (LANA) number per process. The protocol binding path to a network interface is identified by the LANA number.
For more information about Windows 2000 Server Professional Reference, go to New Riders.