(Q) What's the difference between NetBEUI and NetBIOS
(A) NetBEUI: a network transport protocol
NETBIOS: Microsoft's software interface for accessing network resources based on NetBEUI
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IPX/SPX
Short for Internet Packet eXchange \ Sequential Packet eXchange, IPX/SPX is a local-area network communications protocol developed by Novell that exchanges information between network clients, applications, and network peripherals. This Protocol cannot be used over the Internet.
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The NWLink IPX/SPX/NetBIOS Compatible Transport Protocol (NWLink)
http://www.microsoft.com/technet/prodtechnol/windowsserver2003/library/ServerHelp/a4d09cc5-c6dc-4252-89be-2380845a24e4.mspx