广域网络( wan )
DESCRIPTION
广域网络( WAN ). 第五章. 广域网的特点. 支持用户使用计算机进行远距离的信息交换。 覆盖范围广 , 通信的距离远,线路成本增加。 由政府部门组织,电信部门或公司负责组建、管理和维护,并向全社会提供面向通信的 有偿服务 ,流量统计和计费问题. 本章内容. SONET/SDH X.25 F-RELAY ISDN ATM. SONET/SDH -概述. SONET/SDH (同步光纤网/同步数字体系) ( Synchronous Optical Network/ Synchronous Digital Hierarchy ) - PowerPoint PPT PresentationTRANSCRIPT
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WAN
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,
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SONET/SDHX.25F-RELAYISDNATM
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SONET/SDHSONET/SDHSynchronous Optical Network/ Synchronous Digital HierarchySONETANSISDHITU-TSONET/SDH
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SONET/SDH(Mbps)SONETSDH51.840OC-1155.520OC-3STM-1466.560OC-9STM-3622.080OC-12STM-4933.120OC-18STM-61244.160OC-24STM-81866.240OC-36STM-122488.320OC-48STM-16
4976.6400C-96STM-329953.280OC-192STM-64
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SONET/SDHSONET OSI
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SONET/SDH
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SONET/SDHOSISectionLinePath)
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SONET/SDHSMT-1STM-1155.520M2430892703OC-1125us8000/s
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X.25X.25ITU-T1976X.25:8090
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X.25X.25DTEDCEDTEDCE
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X.25
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X.25HDLC
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X.25
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PTNPT3XX3X28X29PSENMCPCPADFEPX.25
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F-RELAY1984CCITTITU-T Q.92264kbps
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FRX.25X25
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FRX.25
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FR-
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ISDNISDNITU-T 1976
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ISDN
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ISDN
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ISDN
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BRI-BRI264kbpsB116kbpsDISDNBRI PRI
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ISDNBRI
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ISDNPRIPRI-PRI2364kbps164kbps
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ISDN
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ATMQoS100us
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ATM-TDMTDM
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ATM-ATDMTDM
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ATM-architectureATMUser-network interfacenetwork-network interface
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ATM-TP VP VCTPTransmission PathVPVirtual PathVCVirtual Circuit
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ATM-virtual connectionVirtual ConnectionVPI,VCIVPIVirtual Path Identifier VCIVirtual Circuit Identifier ,may be repeated under different VP
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ATM-UN CELL NN CELLcell
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ATM-Cell HeadCell Head
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ATM-Connection SetupCall Setup
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ATM-Cell Switch
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ATM-Cell Switch
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ATM-Virtual Circuitcellhead
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ATM ArchitectureATM
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ATMATM Layer
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ATMATMQoSSCRPCRMCRCLRCTDCDV
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ATMATMWAN