专业英语.docx

专业英语.docx

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专业英语

Communicationtechnologyandinformationtechnologymakesitgraduallyincreaseddependenceoncomputers,butthecomputertoomuchuseofthelifeandworkalsobringsnetworksecurityissuescannotbeignored.Alongwiththecomputerusingthedegreeofdepth,causedduetonetworkattacksincreasinglossofproperty,orevendifficulttoassess.layoutisverycomplexcomputernetworks,hosts,andthehierarchicalrelationshipbetweentheterminalisdifficulttoaccuratelypositioning,combinedwithopeningupthesystem,thesefeaturesmakecomputernetworksvulnerabletohackerattacksandmalicioussoftwareofthetarget,sothesecurityandconfidentialityofonlineinformationisacriticalissue. 

AnOverviewOfComputerNetwork

Currentlytheindustryismoreuniformdefinitionofacomputernetwork,usuallyreferstothecommunicationlinewillbeindifferentpartsofthehostcomputerorterminaldevicesconnectedtogethertoformafull-featured,signalflow,collaborativemanagementinformationsystem,withinthesystemofthekindofoperatinginstructions,networkcommunicationprotocolscantransmitthrough,andtoachieveresourcesharingandinformationtransfer[1]intheevolutionofcomputernetworktechnologylonghistory,hasgonethrougharemoteterminalnetworking,computernetworks,networkinterconnectionandinformationsuperhighwayHighway4stages,fromsimpletocomplexandpresentsthemaintrends. 

RemoteterminalNetworking:

thebeginningofthebirthofthecomputer,computernetworkconsistsofanumberofendhostsandcomposition,betweenthehostandterminalconnectedviaatelephonelineanddirectlycallingtheshotsontheterminal,sothenetworkiscalledterminal-orientedcomputercommunicationnetworksinthisnetwork,thehostisthecenter,therestinavarietyofstand-aloneterminalstar,treeorcross-shapedpatternlayout,becauseallterminalserviceslimitedtheabilityofthehost,sothesystemefficiencyisnothigh. 

ComputerNetworks:

Thestageismainlyoriginatedinthelate1960s,whenthefirsttwogenerationsofcomputernetworkbuiltintheUnitedStates,markingthecomputernetworktechnologyintotheInternetage.Typicalfeatureofthistechnologyisthatthewholesystemisbuiltaroundasetofsubnetsexpansionconstruction,inadditiontothissubnethostandterminaldevicesoutsidethenetworkcomposedoftheformationofa"user-resourcenetwork."SubversionofthefirstgenerationofcommunicationsubnetComputertechnologiestocircuitswitchingmeansforsignaltransmissioninfavorofthepacket-switched,becausethetechnologyisbettersuitedtodatacommunicationsthatreducethecostofcomputernetworkcommunications. 

Networking:

ComputerNetworkTechnologythirdstageofdevelopmenttothe"OSIreferencemodeloperator-type"undertheauspicesofthe3rdgenerationofcomputernetworksasasymbolofthetechnologybytheISOwasfirstproposedin1977,afteryearsofeffortandeventuallydevelopedintotheInternetstandardframework.sinceenteringthe1980s,Internettechnologies,theemergenceofcomputernetworktechnologythemostprofoundchange,andthusledtherapiddevelopmentofcomputernetworktechnology.Internet,alsoknownastheInternationalInternet,itsbuildtoOSI-basedarchitecture,butbasedentirelyonanewframework. 

InformationHighway:

Thestageiscomputernetworktechnologyiscurrentlyexperiencedbystage,mainlybeganinthelate1990s,whichisacomputernetworkintheworld'sboomingperiod,andmainlytoBISDNBroadbandIntegratedServicesDigitalNetworkthedirectionoftheevolutionofcomputernetworktechnologyisalsointhiscontextcanbedeveloped,andin1989builtthefirstoneforapublicpacketswitcheddatacommunicationsnetwork,afterwhichbeganthegradualimplementationofcomputertechnologypopularizationandapplicationinthecountry,ImportantinitiativesincludenationalcoverageofChinesepublicpacketdataswitchingnetworkbuilt,andthe"GoldenBridgeProject","GoldenCardProject","GoldenCustomsProject,""KimJiProject"andaseriesof"gold"wordprojectimplementation. 

TwoComputerNetworkSecurityImpactOfTheMainFactors

Fromthecurrentcomputernetworksecurityrisksofview,thenetworkarisesprincipallyfromtheopennessofthenetwork,thenetworkoperatingsystemvulnerabilities,networkresourcesharing,networksystemdesignflaws,malicioushackerattacksandotherfactors[2]Thefollowingfacedwiththesetypesofriskwereelaborate:

Opennessofthenetwork:

Internetisanopensystem,whichleddirectlytoanykindofexternalcomputernetworkaccesscancausesysteminstabilityorevenBencollapseduetotheopencomputernetwork,userscaneasilyfindanonlineenterprises,unitsandindividualssensitiveinformation,whichdirectlyledtoitisinanunsafeenvironment.Topreventsuchsecurityproblemsarise,avarietyoftargetedsecuritymechanisms,strategiesandtoolsareresearchandapplication,butstillneedtodomanyimprovements. 

Networkoperatingsystemvulnerabilities:

Inthetraditionalsecurityanddefensetechnology,thesystem'sbackdoorbecauseofitshiddennatureandignoredbypeople,asthenetworkprotocolsandnetworkservicestoachievecarrier,networkoperatingsystemcannotshirkitsresponsibility,theoperatingsystemrequiresnotonlyprovidesnetworkcommunicationsneedsofthevariousagreementsalsoneedtoimplementnetworkservicesprogram.Duetotheoperatingsystemtoachievenetworkprotocolproceduresareverycomplexandrequirealotofprogramminglanguages​​canbeachieved,andintherealizationoftheprocessofrunningtheprogramdefectsanddeficienciesintheinevitable.Sincetheinvasionofsuchafirewallblockinginsufficient,leadingtosuchintrusionscanlegitimatelythroughthefirewallanddifficulttodetect. 

Networkresourcesharing:

thecomputercanrealizeinformationresourcessharedonthenetwork,whichisthemainpurposeoftheapplicationofcomputernetwork,butthenetworkresourcesharingrisksarisingfromtheissuecannotbeignored.Resourcesharingaspeople'sdependenceoncomputersdeepengraduallyexpanded,butthecurrenttechnologyisdifficulttoachievecompleteisolationexternalservicerequest,anattackerexploittheopportunitytoservicerequestseasilyobtainsensitiveinformationnetworks. 

ThreeMajorDefenseComputerNetworkSecurityCountermeasures

3.1StrengthenTheDailyManagementOfProtection

3.1.1DoNotDownloadUnknownSoftwareAndProcedures

Inthecourseofdailyuseofthecomputer,updatesystempatches,istopreventthevirusfromenteringthebasicrequirements,ifonceinfected,itshouldimmediatelydownloadspecialsoftwaretokilling.Moreover,itshouldnotdownloadsoftwarefromunofficialsites,unidentifiedSoftwaremaybethecarrierofthevirusprogram,oncerunningtheprogrammaycausethecomputertochangedataloss,sochoosereputablewebsitetodownloadsoftwareanddownloadablesoftwareforspecializedandregularantiviruspartitionsaved. 

3.1.2PreventE-MailAttacks

Indailylife,weoftenreceivemessagesfromunknownsources,theclassofmailshouldbehandledcarefully,trynottoopendirectlyinordertoavoidinfringementofthemessagebeingviruspresent,thevirusattachmenttospreadthemessagehasmoreandmore,ifwetheslightestmistakewillinitstrap,maliciouse-mailattacks.e-mailattacks,therearetwomainmethods,andtheperformanceofdifferentforms:

First,e-mailbombing,alsoknownasE-mail"snowball",mainlythroughillegalIPtoattackoccurredshortlymassivespammail,directmailvolumeoverloadcausesparalysis,twoe-mailspoofing,anattackermasqueradingasasystemadministratorbymailrequestingthatpromptstheusertochangetheirpasswordsandotherinformation,andthentheattachedvirusorTrojanhorseprogramisloadedintotheuser'scomputerintrusion.defensesthattypeofattackisrelativelysimple,andsomespecializedmailvirusfilteringsoftwareblockingeffectisobvious. 

3.1.3BrowserSecuritySettings

Webbrowserisalsopartofthevirusofteninvaded,Cookieisduringbrowsingsomewebsitesaresomeofthedataiswrittentotheharddisk,whichrecorduser-specificinformation,sothatwhentheuserbacktothispage,theinformationcanbere-use,souseasecurebrowsersecuritylevelshouldbeset,andturnofftheCook?

ies.howeverbenotedthat,concernedaboutCookieisnotintendedforre-useofsuchinformation,butthedataontheharddiskconcern. 

3.1.4ProtectItsOwnIPAddress

Inthenetworksecurityprotocols,linkintheInternetserverandeveryserviceontheLANterminalhasauniqueIPaddress. Typically,bothfortheuser'sownterms,orintermsofeachother,IPaddressesarehiddenButonthewebchat,chatmessagesbecausetransmissionrequiresbundledIPaddress,thusleadingtotheIPaddresseasilyexposed,whichprovidesanopportunityforthenetworkhackers.hackersgettheuserIPaddressmanyways,buttheuser'stracesortrackinginformationfromtheInternetaccessaccountgetwaymorecommon,butthehackeronceitobtainedanIPaddress,youcancarryoutcyberattacks.Accordingly,indailyusemachineprocessmustdevelopgoodhabits,topreventpersonalinformationleakscriticalinordertoavoidunnecessarylosses.IfyouregularlyuseICQ,preferably"IPPublishing"willbesetup"DonotPublishIPad-dress"electedandonceattacked,norblindlydownloadsoftwareforcleaning,shouldreputablesitetodownloadIPtools,installationandoperationinordertoprotecttheIPaddress. 

3.2InstallationAndConfigurationFirewall

IntheInternet,thenetworkconnection,allusershavedirectaccesstotheout