外文翻译--网络通讯软件的发展趋势简析.doc

DevelopmenttrendbriefanalysisofthenetworkcommunicationsoftwareAlongwiththedevelopmentoftheinformationsciencetechnologyrapidly,thehumanitywillfacethenewtechnologies,newconceptsoneafteranotherincessantlyatanytime.Thedevelopmentofthecomputertechnology,theelectronicsindustry,thenetworkcommunicationandthetransmissiontechnologyapace,madethetimelycommunicationgreatprogressatsomefields,andtheC/Sstructureastherepresentative.TheClient-Server(C/S)technologyevolvesfromthehostcomputertechnologywhichthesingleprocessorsystemgeneratesnaturally,whichmaytracetothecomputerorigin.Inthehostcomputertechnology,datainsystemprocessingandthemanagementisallcompletedinthecentral.Thehostcomputerisrevolvingbythesomeperipherycustomerterminalswhichmerelysimplysupportinformationperformance.IntheperiodoftheClient-Servertechnology,theclientcomputerbecomestheimportantprocessingresources.Theclientsystemprocessingspeedrisesunceasinglyduringthepersonalcomputerrevolution.Nowitsprocessingspeedmightcomparebeautywiththesmallmachineandthelarge-scalemachinerybefore,evenhadsurpassedthem.Atfirstinordertosupportthedepartmentandenterprisesdataaccessing,theClient-Servertechnicalhassupportedtoconnectthroughthelocalareanetwork(LAN)totherearendlarge-scalemachinery,thesmallmachineandtheworkstationserversystem.ThetechnologywhichSupportsthiskindofcommunicationinthesoftwareleveliscalledasthemiddleware.Atfirst,themiddlewareisinstalledtosupporttheClient-ServernetworkcommunicationconventionalabilitybetweenthePCandtheserverplatform.Alongwiththetechnicaldevelopment,themiddlewareisembeddedintheoperatingsystemgradually,soitbecameonekindofordinaryabilityintheclientplatformandtheserverplatform.Theclientsystemwhichthemiddlewarehasbeenembeddedinsupportstotheapplicationprocedureservicewhichareoperatedthroughthelocalandthenetworknow.TheevolvementfromtheClient-Servertechnologytotheembeddedabilityincreasesafewchallengesfortheapplicationsystemexecution.RecentlytheClient-ServertechnologyisbeingreplacedgraduallybytheN-tierObjectOrientedsolution.TheN-tiersolutionBasedontheJavaapplicationprocedureserverhascontainedtosupportthethinclientterminaluserinterface,strengthenedtheexpandabilityandthereliabilityatthesametime.NowtheinterconnectionnetworkismostlybasedonIPv4protocol.ThesuccessoftheprotocolhasfacilitatedtheInternetrapiddevelopment.But,alongwiththeInternetuserquantityisincreasingunceasinglyandtheapplicationrequestoftheInternetisenhancing,thewantoftheIPv4isappearinggradually.MostincisivequestionisthegrowinghugedemandoftheInternetresourcesandtheomenoftheinsufficientIPv4addressspace.AtpresenttheIPv4addresshasalreadyassignedabout70%.AmongitBkindofaddressalreadyisexhausted.AccordingtotheIETFforecast,theIPV4addressresourceswillbeexhaustedin20052010year.Moreover,becausetheIPv4addressplancannotsupporttheaddressgatheringcommendably,theexistingInternetisfacingthepressurewhichtheroutetableinflatesunceasingly.Atthesametime,thedemandsoftheservicequality,mobilityandsecurityandsoonareallurgenttodevelopthenewgenerationofIPprotocols.InordertosettleInternetaddresscrisisdrastically,IETFhas128bitaddressestheIPv6Internetprotocolinthemiddleof1990searly,andhascarriedonthefurtherstandardizedworkin1998.Besidesaddressspaceexpansion,IETFmadethedefinitiontotheIPv6addressstructure.IETFassigntheaddresswhichadoptstheCIDRmethodintheIPv4similarly.IPv6hasalsoprovidedthenewcharacteristictosupporttheautomaticdisposition,themobilityandthesecurityandsoonbetter.Atpresent,themainprotocolsoftheIPv6hasmaturedalreadyandhasformedtheRFCtext,italreadyobtainedtheworldconsistentapprovalastheonlysubstituteoftheIPv4.ThebigcommunicationfacilitymerchantsoverseasallinvestedthemassiveresourcesintheIPv6applicationandresearch,anddevelopedtherelevantsoftwareandhardware.Calledthenetworkfileserver,oneofthemostsuccessfulnetworktechnologies,comesfromtheSunMicrosystemsCo.TheSunMicrosystemsCo.hasbecometheactualstandardsuccessfullythroughprovidingtherealizedsourcecodefreereferencetechnologyvisitauthorityonanyplatform.Thenetworkfileservertechnology,anotherSunMicrosystemsstechnology,oneoffirstgenerationofsuccessfuldistributedcomputertechnologies,isbasedontheopenstylenetworkcomputation.Thenetworkfileserveristhetechnologybasedontheoriented-process,isheldintheCprogramminglanguage,likeotherimportantlong-distanceprocedurecalltechnologies(distributedcomputingenvironment).Thetwokindsoftechnologiesallrealizethedocumentsharingabilitywidely.Thedatabaseservertechnologyprovidesthatthedifferentclientplatformaccessthelong-distancedatabasesystembytheselowerlevelsdistributedcomputingability.HasthematteryouQI!,notlongsincethisspeechiswidelypopularbothsidesoftheriverduringonenight,becomesstandardmessagewhilepeopleleave.Theonlywordwitnessestheco-prosperityandco-indignityhistoryofthetimelycommunicationandtheChineseInternet.Thatcantdenythat,thetimelycommunicationfacilitieswhichtakethefast,interactive,easilyastherepresentative,alreadybecamethenetworkcommunicationtoolwhichthecurrentnetworkusersmostlylike.TheotherInternetincrementservicesBasedonthetimelycommunicationsplatform,likethephonetic,musicorder,informationsharingandsoonarealsochangingpeopleslifestylebytheunprecedentedspeed.AlongwithInternetapplicationismoreandmorerichintheyears,TheInternetthirdwaryearerupteddrastically.AfterTencentQQhaveoccupiedthetimelycommunicationmarket76.7%,MicrosoftMSN,NetEasyPOPO,Yahoo!Messenger,Skypeandsoonenterthemarketinabundance,strivetobethefirststrenuously.Firstly,theimmediatecommunicationapplicationwillbeevenmoremultiform.Inlaterseveralyears,peoplemighttheclearlyfeelthatthechattedentertainmentdemandwhichtheuserdemandtimelycommunicationisgrowingunceasingly,alongwiththetimelycommunicationfacilitiesitselfmoreandmorerichly.Theapplicationofthemoreprolificentertainmentwillalreadybecomesthemaindevelopmentdirectionofthetimelycommunicationinfuture.Inordertomeettheuserexuberantentertainmentapplicationneeddaybyday,manytimelycommunicationsservicesprovidersalldeveloptheprolificapplicationbasedonthetimelycommunicationplatform,forexample:Thevirtualimage,themagicexpressionandthevirtualpetsandsoon,whichthenewapplicationemergesoneafteranotherincessantly.Second,thetimelycommunicationevenwillbemoreandmoreabsorbsthepeoplesattention,willmanifestthecommunityandInteractionTheanalysisdemonstrated,thereasonthatthetimelycommunicationisdevelopinginrecentyearsswiftlyandviolently,istheimportantimpetusfactornotonlytheitsitselffunctionbutalsotheInternetrapidlygatheringuser.AccordingtotheCNNICstatisticsreport:theuseraccessedtheinternetistotalto87millionusersinourcountryuntilJune30,2004,thecomputersaccessedtheinternethaveachieved36.3millioncomputers,thenetworkapplicationofthetimelycommunicationservicesliketheemail、thesearchengine、thebrowsinginformationandsoonaregoingintotoinwebusersdailylifeinmaximum.FollowingtheInternetdevelopmentandthenetworkuserdemand,thecomm-unityandtheinteractionwhichareabsorbingamassofuserswillalsobecometheimportantdevelopmenttendencyofthetimelycommunication.AccordingtotheconcernedexpertforecastthatthenetworkhypothesizedlifewillbecomethehotspotoftheInternetapplicationinthefuturetwoorthreeyears.Thenetworkusermayhavenetworklifelikethereallifee.g.purchaseshomes,buysthevehicle,andraisesthepetandsoon.Atthesametime,thepurechattingtoolisentrustingwiththenewconnotation,becomesarichindividualspace.Therearenotonlythefriendswhomaychatwithyou,butalsogames,news,community,diaryandsoon.TheInternetenterprisesetsupthealumnusinthenetwork,foundscommunity,providestheplatformwhichcomposesthediaryforthenetworkuser,letstheusersestablishtheirownblog.Itissatisfiedthenetworkusersdemandtothenetworkhypothesizedlife.Thethirdtendencywillbetheevenmoreoutstandingfunctionprocessingindividualinformationoftheimmediatecommunication.Humanizationwillbecomethefinalfactoroftheimmediatecommunicationasthemostquickandconvenientcommunicationtool.Atpresentitalreadywasappliedwidelytointhedailyworkandthestudy.TheuserhadaffiliatedwithandsavedthemassivematerialsdocumentontheInterneteveryday.Therefore,asthetransmissioninformationterminal,theindividualinformationprocessingfunctionoftheimmediatecommunicationwilldecidetheitselfvitalityradically,whichnotonlyincludestheinformationinteractivefunctionofthewritingdialogue、thevoicecommunication、thevideointercommunion,butalsoincludestheinformationsharingfunctionofthefiletransferandthetransmissionpicture,meanwhileincludestheeffectivepreservationofthechattedrecording,thedown-transmissionanddownloadinformationmanagementfunction.ThefourthtendencyisthattheimmediatecommunicationevenmoreemphasizestheInternetapplicationconformity,thewirelessInternetresourcesconformityinparticular.NowtheapplicationoftheimmediatecommunicationandtheexchangeoftheInternetinformationalreadymergedintooneorganicbody,sotheeachkindofserviceoftheconformityInternetwillbecometheinevitabletrendwhichtheimmediatecommunicationfuturewilldevelop,whichsatisfiestheimmediatecommunicationuserssharetheInternetresources.Atpresent,SinaUC、theneteasyhubble-bubblehavethegatewaywebsitetheformidablenetworkresources,butMicrosoftalsoisstrengtheningthegatewaywiththeaidofMSNtheinfluence.Theimmediatecommunicationapplicationwillpresentwiththetraditionalgatewaywebsite,motionorthefixedterminal,thenetworkapplicationincrementservicedepthconformitytendency；inthewirelessInternetresourcesconformity,thepeoplehopetogetsridthelinefetterandgetthe“wireless”freedommoreandmore,alongwithhandsetapplicationisstudiedanddevelopedunceasinglyinthenearlytwoyearinourcountry.Thewirelessaccesseswillbecomethenetworkuserspet.Thatthehandsetlandsoracceptsfromtheinternetinformationisalsotoreceivetheusersfavor,especiallytheimmediateinformationornews.InfuturetheconformitybetweentheInternetandthewirelessnetwillbetheinevitablehome,themutualconnectionbetweentheimmediatecommunicationandthewirelesswillalsobeawaythatmustbetaken.Alongwith3Gdevotion,theimmediatecommunicationusersmotiondemandishigher；theimmediatecommunicationmotionincrementservicewillbeabletodeveloponesabilitytothefull.ThefifthtendencywillbethattheimmediatecommunicationevenmoremanifeststhesecurityandthestabilityAccordingasinvestigationdemonstration,theusernotonlyneedstorealizethevoice,audiofrequency,videofunctionandsoonthroughtheimmediatecommunication,butalsotheimmediatecommunicationsecurityalongwitheachkindofdataserviceapplicationincreasing.IDrobbed,privacyexposition,viralinvasionandsoonispuzzlingallalong.Inparticulartotheenterpriseusers,ifthesecuritymeasurei