network protocols handbook.pdf

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288Protocols GuideIBM ProtocolsSNATransaction servicesPresentation servicesData flow controlTransmission controlPath controlData link controlPhysicalOSIApplicationPresentationSessionTransportNetworkData linkPhysicalFigure 2-23: IBM SNA vs. OSI ModelProtocol StructureThe IBM main protocols are listed as follows:SNA LayerTransaction ServicesPresentationServicesData Flow ControlTransmissionControlPath ControlData Link ControlIBM ProtocolsSMB: Server Message Block protocolIPDS: Intelligent Printer Data StreamAPPC: Advanced Program to Program Communication(LU 6.2)LU: Logic Units - LU 0, LU 1, LU2, LU 3 LU6.2NetBIOS: Network Basic Input Output SystemNetBEUI: NetBIOS Extended User InterfaceNAU: Network Addressable UnitsAPPN: Advanced Peer to Peer NetworkingDLSw: Data Link Switching protocolQLLC: Qualified Logic Link Control for SNAover X.25SDLC: Synchronous Data Link ControlprotocolReferencehttp://www-306.ibm.com/software/networkSystems Network Architecturehttp://publib-b.boulder.ibm.com/Redbooks.nsf/RedbookAbstracts/Inside APPN and HPR - The Essential Guide to the Next-GenerationSNAhttp://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/SNA APPN Architecture Reference
289Protocols GuideIBM ProtocolsProtocol NameIBM SMB: Server MessageBlock protocolProtocol DescriptionServer Message Block (SMB) protocol is an IBM protocol forsharing files, printers, serial ports, etc. between computers. TheSMB protocol can be used over the Internet on top of the TCP/IPprotocol or other network protocols such as Internetwork PacketExchange (Novell IPX) and NetBEUI.SMB is a client server, request-response protocol, which providesa method for client applications in a computer to read andwrite to files and to request services from server programs invarious types of network environment. Using the SMB protocol,an application can access files as well as other resources includingprinters, mailslots and named pipes, at a remote server.In the TCP/IP environment, clients connect to servers using Net-BIOS over TCP/IP (or NetBEUI/TCP or SPX/IPX). Once theyhave established a connection, clients can then send SMB commandsto the server that allow them to access shares, openfiles, read and write files, and generally do all the things that youwant to do with a file system.Microsoft Windows operating systems since Windows 95 includeclient and server SMB protocol support. Microsoft has offeredan open source version of SMB for the Internet, called theCommon Internet File System (CIFS), which provides more flexibilitythan existing Internet applications such as the File TransferProtocol (FTP). For UNIX systems, a shareware program,Samba, is available.The Server Message Block (SMB) protocol defines two levelsof security:• Share Level - Protection is applied at the share level ona server. Each share can have a password, and a clientonly needs that password to access all files under thatshare.• User Level - Protection is applied to individual files ineach share and is based on user access rights. Eachuser (client) must log in to the server and be authenticatedby the server. When it is authenticated, the clientis given a UID which it must present on all subsequentaccesses to the server.SMB ProtocolVariantPC NETWORKPROGRAM 1.0MICROSOFTNETWORKS1.03MICROSOFTNETWORKS3.0LANMAN1.0DOSLM1.2X002LM1.2X002DOS LAN-MAN2.1LANMAN2.1Windows forWorkgroups3.1aNT LM 0.12SambaCIFS 1.0Protocol NameCore ProtocolCore PlusProtocolDOS LANManager 1.0LAN Manager1.0LAN Manager2.0LAN Manager2.0LAN Manager2.1LAN Manager2.1LAN Manager2.1NT LAN Manager1.0NT LAN Manager1.0NT LAN Manager1.0Related protocolsTCP, SPX, IPX, NetBIOS, NetBEUICommentsThe original version of SMB asdefined in IBM’s PC NetworkProgram. Some versions werecalled PCLAN1.0Included Lock&Read andWrite&Unlock SMBs with differentversions of raw read and rawwrite SMBsThe same as LANMAN1.0, butOS/2 errors must be translated toDOS errors.The full LANMAN1.0 protocol.The same as LM1.2X002, buterrors must be translated to DOSerrors.The full LANMAN2.0 protocol.The same as LANMAN2.1, buterrors must be translated to DOSerrors.The full LANMAN2.1 protocol.Windows for Workgroups 1.0?Contains special SMBs for NTSamba’s version of NT LM 0.12?Really NT LM 0.12 plus a bitSponsor SourceServer Message Block (SMB) is an IBM protocol.Referencehttp://samba.anu.edu.au/cifs/docs/what-is-smb.htmlWhat is SMB?Protocol StructureSMB has many variants to handle the complexity of the underneathnetwork environments in which it is employed. The followingtable displays part of the SBM variants:
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ITable of ContentsTable of Contents
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IVTable of ContentsCR-LDP: Constrai
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2Network Communication Architecture
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10Network Communication Architectur
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12Protocols GuideTCP/IP Protocolspo
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14Protocols GuideTCP/IP - Applicati
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52Protocols GuideTCP/IP - Session L
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54Protocols GuideTCP/IP - Transport
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64Protocols GuideTCP/IP - Network L
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98Protocols GuideTCP/IP - Data Link
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100Protocols GuideTCP/IP - Data Lin
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102Protocols GuideSecurity and VPNP
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104Protocols GuideSecurity and VPN
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120Protocols GuideVoice Over IP(VOI
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150Protocols GuideWANOtherxDSL: Dig
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152Protocols GuideWAN - ATM Protoco
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170Protocols GuideWAN - Broadband A
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178Protocols GuideWAN - PPP Protoco
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188Protocols GuideWAN - Other WAN P
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196Protocols GuideLAN - Ethernet Pr
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204Protocols GuideLAN - Virtual LAN
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210Protocols GuideLAN - Wilress LAN
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216Protocols GuideLAN - Other Proto
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222Protocols GuideMAN ProtocolsProt
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224Protocols GuideMAN Protocols(0).
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226Protocols GuideStorage Area Netw
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228Protocols GuideSAN ProtocolsProt
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230Protocols GuideSAN ProtocolsThe
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232Protocols GuideSAN Protocols•
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338Network Protocols Dictionary: Fr
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340Network Protocols Dictionary: Fr
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342Network Communication Protocols
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