network protocols handbook.pdf

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262Protocols GuideISO Protocols - Network LayerRelated protocolsIS-IS, CLNP, IDRP, CONP, ES-IS, ISO-TPSponsor SourceCLNP is defined by ISO (www.iso.org) in document 8473 andITU (www.itu.org) X.213 and X.233.Referencehttp://www.javvin.com/rfc994.pdfFinal Text of DIS 8473, Protocol for Providing the Connectionless-modeNetwork Servicehttp://www.doc.ua.pt/arch/itu/rec/product/X.htmX.213: Information technology – Open Systems Interconnection– Network service definitionX.233: Information technology - Protocol for providing the connectionless-modenetwork service: Protocol specification
263Protocols GuideISO Protocols - Network LayerProtocol NameISO CONP: Connection-OrientedNetwork ProtocolProtocol DescriptionConnection-Oriented Network Protocol (CONP) is an OSI networklayer protocol that carries upper-layer data and error indicationsover connection-oriented links. Two types of OSI networklayer services are available to the OSI transport layer:• Connectionless Network Service (CLNS)—CLNS performsdatagram transport and does not require a circuitto be established before data is transmitted.• Connection-Mode Network Service (CMNS)—CMNS requiresexplicit establishment of a path or circuit betweencommunicating transport layer entities before transmittingdata.CONP, based on the X.25 Packet-Layer Protocol (PLP), providesthe interface between CMNS and upper layers. It is a networklayer service that acts as the interface between the transportlayer and CMNS. Six services are provided to transport-layerentities: one for connection establishment, one for connectionrelease, and four for data transfer. Services are invokedby some combination of four primitives: request, indication, response,and confirmation.There are two types of addresses used in the network layercommunication:• Network Service Access Point (NSAP) - NSAP addressesidentify network layer services, one for each servicerunning.• Network Entity Title (NET) - NET addresses identify networklayer entities or processes instead of services.• CDP - Country Domain Part, 2..4 octets• CFI - Country Format Identifier, one digit• CDI - Country Domain Identifier, 3 to 7 digits, fillsCDP to an octet boundary• CDSP - Country Domain Specific Part• RDAA - Routing Domain and Area Address• ID - System Identifier (1..8 octet)• SEL - NSAP SelectorWhile RDIs and RDCIs need not be related to the set of addresseswithin the domains they depict, RDIs and RDCIs areassigned based on the NSAP prefixes assigned to domains. Asubscriber RD should use the NSAP prefix assigned to it as itsRDI. A multihomed RD should use one of the NSAP prefixes assignedto it as its RDI.Related protocolsIS-IS, CLNP, IDRP, CONP, ES-ISSponsor SourceCONP is defined in ISO (www.iso.org) 8208 and 8878 and Itu(www.itu.org) X.213 and X.223.Referencehttp://www.doc.ua.pt/arch/itu/rec/product/X.htmX.213: Information technology – Open Systems Interconnection– Network service definitionX.223: Use of X.25 to provide the OSI connection-mode Networkservice for ITU-T applicationsProtocol StructureThe General Format of NSAP:1byte 2bytes 2-4bytes 0-13bytes 1-8bytes 1byteIDPDSPAFI IDI CDP CDSPAFI IDI CFI CDI RDAA ID SEL• IDP - Initial Domain Part• AFI - Authority and Format Identifier, a two-decimaldigit,38 for decimal abstract syntax of the DSP or 39for binary abstract syntax of the DSP• IDI - Initial Domain Identifier, a three-decimal-digitcountry code, as defined in ISO 3166• DSP - Domain Specific Part
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ITable of ContentsTable of Contents
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IVTable of ContentsCR-LDP: Constrai
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VITable of ContentsCOPS: Common Ope
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VIIITable of ContentsGARP: Generic
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XTable of ContentsIGRP: Interior Ga
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XIIFigureFigureFigure 1-1: Communic
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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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210Protocols GuideLAN - Wilress LAN
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312Protocols 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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