computer network 计算机网络（英语论文）

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1、计算机网络（双语）论文作者：学号：院系：自动化工程学院专业：测控技术与仪器082题目：COMPUTERNETWORK指导者：评阅者：CataloguePreface………………………………………………………332Basics…………………………………………………………5lUltra-High-frequencycommunication(≥100MHz)…………………5lHomenetworking(LAN)…………………………………………………6lInternetaccess(broadbandoverpowerlines)……………………8lMediumfreque

2、ncy(kHz)………………………………………………10lLow-speednarrow-bandcommunication…………………11lHigh-speednarrow-bandpowerlinecommunication —distributionlinecarrier……………………………………………………………13lTransmittingradioprograms…………………………………………14lUtilityapplications…………………………………………………15lLowfrequency(

3、16lBroadbandoverpowerline(BPL)……………………………………17l'notchingout'anddynamicadaptationtocontention………………………………………………………………18lInterferenceissueremainsachallengetoPLCsystems………19lAutomotiveuses…………………………………………………………21lFailureScenarios………………………………………………………21lIEEEP1901,ITUG.hnhomegrids………………………………

4、……22lStandardsorganizations………………………………………………24Smallandmedium-sizedenterpriseofficeLANconstructionscheme……………………………………………25Personalfeeling…………………………………………30Referencedirectory……………………………………………32Preface32Thisarticleisnowinitsfourthedition.Eacheditionhascorrespondedtoadifferentphaseintheway

5、computernetworkswereused.Whenthefirsteditionappearedin1980,networkswereanacademiccuriosity.Whenthesecondeditionappearedin1988,networkswereusedbyuniversitiesandlargebusinesses.Whenthethirdeditionappearedin1996,computernetworks,especiallytheInternet,hadbecomeadailyrealityformillionsofpeopl

6、e.Thenewiteminthefourtheditionistherapidgrowthofwirelessnetworkinginmanyforms.Thenetworkingpicturehaschangedradicallysincethethirdedition.Inthemid-1990s,numerouskindsofLANsandWANsexisted,alongwithmultipleprotocolstacks.By2003,theonlywiredLANinwidespreadusewasEthernet,andvirtuallyallWANsw

7、ereontheInternet.Accordingly,alargeamountofmaterialabouttheseoldernetworkshasbeenremoved.However,newdevelopmentsarealsoplentiful.Themostimportantisthehugeincreaseinwirelessnetworks,including802.11,wirelesslocalloops,2Gand3Gcellularnetworks,Bluetooth,WAP,i-mode,andothers.A