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1、CloudComputingCloudcomputingisaserviceprovidedbywayofadynamicscalablevirtualizedcomputingmodelresourcesovertheInternet.Thismodeoffersavailable,convenient,on-demandnetworkaccessintoasharedpoolofcomputingresourcescanbeconfigured(resources,includingnetworks,servers,stor
2、age,applications,services),theseresourcescanbequicklyprovided,justputitlessadministration,orwithserviceprovidersrarelyinteract. Itiscalculatedbythedistributionofthelargenumberofdistributedcomputers,ratherthanthelocalcomputeroraremoteserver,runningenterprisedatacent
3、ersandtheInternetwillbemoresimilar.Thisallowscompaniestoswitchtotheapplicationoftheresourcesrequired,accordingtodemandaccesstoacomputerandstoragesystems.Likeasinglegeneratorfromtheoldmodeltoacentralizedpowerplantmodel.Itmeansthatcomputingpowercanalsobeusedasatradable
4、commodity,likegas,waterandelectricity,asaccesstoconvenient,inexpensive.ThebiggestdifferenceisthatitistransmittedthroughtheInternet. Cloudcomputingservicecharacteristicsandnatureofclouds,watercirculationontheInternethasacertainsimilarity,sothecloudisaveryaptanalogy.
5、 Cloudcomputingproposedforthedevelopmentofcomputersplayedaroleinmakingthenetworkmorewidelybased.Inmyopinioncloudcomputinghasfoursignificantadvantages:Cloudcomputingprovidesthemostreliableandsecuredatastoragecenter,usersdonothavetoworryaboutdataloss,virusattacksa
6、ndotherproblems;cloudcomputingclientdevicesrequireaminimum,isalsothemostconvenience;cloudcomputingdataandapplicationscanbeeasilysharedbetweendifferentdevices;cloudcomputingasweusethenetworkprovidesalmostinfinitenumberofpossibilities. Butontheotherhandtherearealsodi
7、sadvantagestwoaspects:first,itissafe,becausethecloudcomputingpoweranddatainthecloud,howtoensurethesecurityofcustomerdataisarelativelyimportant.Securityhastwoaspects,oneisthedataisnotlost,thegeneralserviceproviderswillhavetheabilitytosolvebackup,butalsooccursoccasiona
8、llylost;Anotheristhatyourdatawillnotleak,althoughthiswilltakesomemeasurestoserviceproviders,nottooutsiders,suchashackerattackstoget
