network protocols handbook.pdf

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256Protocols GuideISO Protocols - Application LayerReferencehttp://www.doc.ua.pt/arch/itu/rec/product/X.htmX.226: Information technology - Open Systems Interconnection- Connection-orientedPresentation protocol: Protocol specificationX.216: Information technology - Open Systems Interconnection- Presentation service definitionX.236: Information technology - Open Systems Interconnection- Connectionless Presentation protocol: Protocol specification
257Protocols GuideISO Protocols - Application LayerProtocol NameISO-SP: OSI Session LayerProtocolProtocol DescriptionThe OSI Session Layer Protocol (ISO-SP) provides sessionmanagement, e.g. opening and closing of sessions. In case ofa connection loss it tries to recover the connection. If a connectionis not used for a longer period, the session layer may closeit down and re-open it for next use. This happens transparentlyto the higher layers. The Session layer provides synchronizationpoints in the stream of exchanged packets.The Session Protocol Machine (SPM), an abstract machine thatcarries out the procedures specified in the session layer protocol,communicates with the session service user (SS-user)through an session-service-access-point (SSAP) by means ofthe service primitives. Service primitives will cause or be theresult of session protocol data unit exchanges between the peerSPMs using a transport connection. These protocol exchangesare effected using the services of the transport layer.Session connection endpoints are identified in end systems byan internal, implementation dependent, mechanism so that theSS-user and the SPM can refer to each session connection.The functions in the Session Layer are those necessary to bridgethe gap between the services available from the Transport Layerand those offered to the SS-users.The functions in the Session Layer are concerned with dialoguemanagement, data flow synchronization, and data flow resynchronization.These functions are described below; the descriptions aregrouped into those concerned with the connection establishmentphase, the data transfer phase, and the release phase.Protocol StructureISO Session Layer Protocol Messages:KernelFunctional unit SPDU code SPDU nameCNOACDOACRFFNDNABAADTPRCONNECTOVERFLOW ACCEPTCONNECT DATA OVERFLOWACCEPTREFUSEFINISHDISCONNECTABORTABORT ACCEPTDATA TRANSFERPREPARENegotiated releaseHalf-duplexDuplexNFGTPTGTPTNOT FINISHEDGIVE TOKENSPLEASE TOKENSGIVE TOKENSPLEASE TOKENSNo additional associatedSPDUsExpedited data EX EXPEDITED DATATyped data TD TYPED DATACapability dataexchangeMinor synchronizeSymmetric synchronizeData separationMajor synchronizeResynchronizeExceptionsActivity managementCDCDAMIPMIAGTPTMIPMIAMAPMAAPRGTPTRSRAPREREDASARAIAIAADADAAEAEAPRGTPTGTCGTARelated <strong>protocols</strong>ISO-TP, ISO-PP, CONP, CLNPCAPABILITY DATACAPABILITY DATA ACKMINOR SYNC POINTMINOR SYNC ACKGIVE TOKENSPLEASE TOKENSMINOR SYNC POINTMINOR SYNC ACKNo additional associatedSPDUsMAJOR SYNC POINTMAJOR SYNC ACKPREPAREGIVE TOKENSPLEASE TOKENSRESYNCHRONIZERESYNCHRONIZE ACKPREPAREEXCEPTION REPORTEXCEPTION DATAACTIVITY STARTACTIVITY RESUMEACTIVITY INTERRUPTACTIVITY INTERRUPT ACKACTIVITY DISCARDACTIVITY DISCARD ACKACTIVITY ENDACTIVITY END ACKPREPAREGIVE TOKENSPLEASE TOKENSGIVE TOKENS CONFIRMGIVE TOKENS ACKSponsor SourceThe ISO-SP (OSI Session Layer protocol) is defined in ISO(www.iso.org) documents 8326 and 8327 and ITU (www.itu.org)documents X.215, X.225, X.235.
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ITable of ContentsTable of Contents
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IVTable of ContentsCR-LDP: Constrai
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XTable of ContentsIGRP: Interior Ga
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XIVPerfacePrefaceWe are living in t
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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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306Protocols GuideSS7 / C7 Protocol
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318Protocols GuideOther Protocols
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320Protocols GuideOther ProtocolsPr
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322Protocols GuideOther ProtocolsPr
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324Network Protocols Dictionary: Fr
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342Network Communication Protocols
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