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4LANWANE-mailWANLANWANLANWAN•LAN(NICMAU)•LAN•WAN()•WAN4.1LANLANLAN•NIC••MAU•••••4.1.1NIC3NICNICNIC(4-1)NICNICNIC(ROM)NICNIC4-1NICNICNICNICNICNICNICMANCRC(2)NIC9.6NICMAC•••G•••FDDI•ATM481NICNICNIC(NIC)FDDINICATMNICFDDINIC()FDDIFDDIATMNICATMATMATMATMNICNICNICCPU•(IndustryStandardArchitectureISA)8168MB/s•(ExtendedIndustryStandardArchitectureEISA)ISA32EISA/CPU•(MicrochannelArchitectureMCA)IBM32•(PeripheralComputerInterfacePCI)3264PCI•SPARC(SBUS)SunMicrosystemsSPARC•NuBusAppleMacintoshIIMacintoshPerforma96•VESA(VL-bus)80486NICCPU32VESAPentiumPCINICNIC•NICNIC100MbpsPCINIC•NICNICGNIC•NICNICNICPCI•NIC82/•NIC(Windows95Windows98WindowsNT)•NIC•FDDIFDDINICNICNICNICNICWeb(4-4WebNIC)4.1.210Base550010Base2185IEEE10Base218530()OSIIEEE4-210Base210Base5•10Base218510Base5500•30••2~810Base218529IEEE425000100044(4-3)AUI(4-1)••4834-2•••••••NIC4-384/(10Base5)10Base210Base2CEO4-34404101228()4.1.3(MultistationAccessUnitMAU)MAU•••••MAU3(mediaaccessunit)()MSAUMAUType1Type2()Type3()MAUMAUOSIMAU8(4-4)MAU16MAU(passivehub)MAUType3(UTP)72(activehub)485Type3150Type1Type2260(Type3Type1Type2Type1Type2)MAU(RI)(RO)MAURIROMAU1MAURO2MAURIMAUMAU12MAU(ControlledAccessUnitCAU)CAUMAUCAU4.1.4••LAN••Ethernet-to-FDDI•••()•12()()812248(4-5)86/(RI)(RI)4-4MAU4-5FDDIATM4-2MAC(2)LAN•••GB•FDDI••4874.1.5LANLAN•(30)LAN•LAN185•LAN•LANEthernetII/IEEE802.3(promiscuousmode)OSIMACMAC3000015000MACTCP/IPIPXAppleTalkX.25(4-6)88/NetBEUI(WindowNT)IPX(NetWare)TCP/IP(UNIX)4-6ALAN1LAN2(4-7)BLAN2LAN3LAN1ABLAN34-752A3LAN1LAN2LAN3LANLAN489LAN3LAN1BA(localbridge)LANLAN/PC(remotebridge)1.IBM802.5LANOSILAN31(4Mbps400016Mbps17800)802.5RIF()802.5(RoutingInformationIndicatorRII)1(0)7332.IEEE802.1d290/ID(6)(BridgeProtocolDataUnitsBPDU)BPDUBPDU4-8BPDU•ProtoIDBPDU0•Vers0•MessTypeBPDU0•FlagsTCTCATC6•RootID6•RootPathCost()•BrdgIDID•PortIDID•MessAgemessageage•MaxAge•HelloTime•ForwDelay(TopologyChangeMessages4ID00128)4-8BPDUMACMACMACBPDU()1.544MbpsT-110Mbps491HelloBPDUHelloBPDU(20)BPDU88CSMA/CD4.1.6OSILAN4-94-992/TCP/IPInternet•••••TCP/IPIPTCP/IPIPX(TCP/IPAppleTalk)•••••••ATM•ISDN•X.25(metric)NetBEUILAT1.4932.(TCP/IP)(TCP/IPIPX/SPX)TCP/IPTCP/IPIPX/SPXLANRIPOSPF(RoutingInformationProtocolRIP)RIPRIPRIPRIPRIPIPIP(OpenShortestPathFirstOSPF)RIPRIPOSPF8OSPFLAN94/(localrouter)15TCP/IPIPX/SPXAppleTalk4.1.7(brouter)••••NetBEUIIPX/SPXTCP/IP()MACNetBEUI(NetBEUI)TCP/IP4.1.8LAN(2)MACLANLAN()(cut-throughswitching)MAC(store-and-forwardswitching)CRC()495()(3)2803CPUCPUCPUCPUCPU100%CPUCPUCPUCPU••••••FDDI•ATMMAC10Mbps(100Mbps1Gbps)IEEE810Mbps10Mbps780Mbps(810Mbps=80Mbps)(VirtualLANVLAN)IEEE802.1qVLANVLANVLAN96/VLANVLAN2MACVLAN2LAN24.1.9•(TCP/IP)(SNA)•••LAN•••OSIOSIIBM(SystemsNetworkArchitectureSNA)TCP/IPIBM(DataLinkControlDLC)MicrosoftWindows95Windows98WindowsNTIBM(UNIX)IBMTCP/IPTCP/IPE-mailOSIE-mailMicrosoftMailServicesMercuryMailccMail4.2WANWANPOTSTISDNISDNWANWAN•497••PBXPABXPAX•••4.2.13••(T)•LANWAN•X.25ISDNX.25ISDN4-104-10OSI(2)(TDMA)(FDMA)(WavelengthDivisionMultiplexingWDM)10.00000014000~7000WDM98/4.2.2T-1T-2T-3ISDND-1(3)T-1D-4DACST-3ISDN(8ISDN)POPT-1POP4.2.3RBOC(RegionalBellOperatingCompany)1005010010050RBOC(PrivateBranchExchangePBX)PBX(PrivateAutomaticExchangePAX)(PrivateAutomaticBranchExchangePABX)PABXPAXPAXPABX()RBOCCPU()PAXPABXCPU()PBXPBXPAXPABX499ISDNT-1T-3TISDNWAN4.2.4WANmodemmodulator/demodulatorDB-2525DB-99IBMPC(UniversalSerialBusesUSB)USBRJ-11/300~12009600/56Kbps100KbpsMicrocomMicrocom(MNP)MNP(Class2~6Class10)ITUV.42MNP4-1ITU-TPCPC(DataTerminalEquipmentDTE)(DataCommunicationsEquipmentDCE)PC(DTE)DCEPCV.34V.4214400bps28800bps100/19984-1ITU-TITU-TV.1714400bpsV.21300bpsV.221200bpsV.22bis2400bpsV.23600/1200bpsV.25V.262400bpsV.26bis1200/2400bpsV.26ter2400bpsV.274800bpsV.27bis2400/4800bpsV.27ter2400/4800bpsV.299600bpsV.329600bpsV.32bis14400bpsV.3314400bpsV.3428800bpsV.3548000bpsV.42V.42bis41V.9056600bpsISDN(TerminalAdapterTA)PCISDNTA(128Kbps~512Kbps)TA()30Mbps15Mbps10Mbps4.2.5WANX.25T-1T-3ISDNNICISDNX.25816(1020)(4-410111)814704-114.2.6WANATMISDNX.25ISDNWANT-1CSU/DSU(3)X.25X.254.3LANWANNICNICIEEE102/T-1NT4LANWANWANT-1ISDN4.3.11)LANOSIa.2b.3c.4d.52)LANa.b.FDDIc.d.e.ac3)10Base2185a.b.c.d.e.ac4)NICa.b.NICc.NICd.NIC5)OSIa.b.c.d.6)56Kbps4103a.V.bisb.V.35c.V.90d.V.427)a.0b.1c.2d.3e.8)NICa.b.c.MACd.e.ab9)a.(CollisionDomainHubCDH)b.(MAU)c.(CAU)d.e.bc10)a.T-1b.c.d.e.abf.ac11)NICa.b.c.FDDId.ISDN12)a.b.c.d.104/13)a.MACb.c.d.14)a.PBXb.PXXc.PABXd.PAX15)a.b.c.d.e.ab16)a.b.c.d.e.ab17)T-1a.b.c.d.e.abf.bc18)MAUa.b.c.d.19)a.b.c.MAUd.410520)a.1b.2c.3d.4e.21)NICa.b.c.d.22)OSIa.1b.2c.3d.4e.2323)a.ODBCb.PPPc.IPd.RIP24)a.b.c.d.CRC25)a.b.c.d.e.abf.bc4.3.24-110Base2106/10Base25Microsoft4-124-121)Microsoft2)3)repeater.bmp4)5)line()Microsoftline6)7)()5PC8)PCpc.bmp9)PC(PC)PC10)PC8PCPC11)103PC12)2(7)5PC(8~10)410710Base210Base213)Microsoft10Base214)15)4-21)2)LED3)LED4)5)6)LED7)LED8)9)10)11)()12)13)LED14)()15)4-310Base-TPCUTPUTPUTP3(9.9ft)()1)PC2)PC3)PCNIC4)PC()reset()108/5)PC6)UTPPC7)PC()PCWindows95Windows98WindowsNTPC(PC)4-4WebNICMicrosoftInternetExplorerNetscapeCommunicator1)CommunicatorInternetExplorer2))Software