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1、上海交通大学工程硕士学位论文ABSTRACTTheDesignandRealizationofCentraVirtualClassroomPlatform’sDistributionalDeploymentABSTRACTWithinthedevelopmentofInternet,numbersofitsusershavealreadybeenreachedanunprecedentedlevel.Theappearanceofmassapplicationsandvariousconceptsspringsuplikemushroom,inw
2、hichoneofthemostsignificantusesise-learning.Afterfour-timerevolution,e-learninghasalreadychangedfromtheunidirectionalinstructiontotheinteractfeedback.Forthepurposeofrealizingthetargetthatassemblesdispersedusersjustlikethetraditionalwayinclass,theconceptofvirtualclassroomispro
3、posed.Combinedwithbasiccollaborativefunctionofonline-meetingincludingvoice,video,theelectronictabularasa,documentssharing,andvotingsystem,specialtrainingapproaches,whichcontainshands-raising,thecorrespondenceQ/Aandgroupdiscussion,maygainthesameeffectsastraditionaloff-linemean
4、s.Therefore,Virtualclassroomhasbecomeanadvancedtechnologyinthefieldofe-learning.Afternearly20years,China’sinternetpenetrationratehasrisensteadily,however,consideringsuchnegativefactorsasdifficultiesincross-networkvisitingandbackbonelinkjamwhichresultedfromthedomesticnetworkss
5、eparation,virtualclassroomdoesnottakefulleffects.Thisresearchwillprimarilydiscussonvirtualclassroomtrendofdevelopment,networkcharacteristic,large-scaleteachingsolution,highredundancyofsystemplatform,highavailabilityandsoon.CombinedwithCentraVirtualClassroomsystem,thisresearch
6、isbasedontheanalysisandtestofnationalnetworktofinishthecross-networkandcross-boundarydistributionaldeploymentofCentravirtualclassroomsystem.Thus,itrealizesthefollowingeffects:1st,makingitpossibleforuserstothenearestaccess;第IV页上海交通大学工程硕士学位论文ABSTRACT2nd,reducingthebackbonenetwo
7、rktrafficflowandtherequirementofthebackbonenetworkbyusingtheCentraSatelliteServer;3rd,byusingload-balanceandCentraSatelliteServertorealizethesystemplatform’shighredundant,thehighavailability;4th,realizingtheintegrationoftheabilityplatformandthebusinessmanagementplatformbydeve
8、lopmentAPIinterfaces.Throughdistributionaldeploymentofthevirtualclas
