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1、ASelectiveSurveyofDDoSRelatedResearchLorandJakab´JordiDomingo-PascualUniversitatPolitecnicadeCatalunya`UniversitatPolitecnicadeCatalunya`ljakab@ac.upc.edujordid@ac.upc.eduAbstractattackedresourcesnotrequired).AnotherfactorthatmakesmisbehaviorattheIPlayer(
2、andabove)difficulttocounterTheopennatureoftheInternetmakesdistributeddenial-istheabilitytospoofthesourceaddressofpackets.Theof-service(DDoS)attacksrelativelyeasytomountanddif-Internetarchitectureisbasedontheprinciplethatthecoreficulttocounter.Inthetenyearss
3、incethefirstattackswerenetworkshouldbekeptassimpleaspossible,pushingcom-observedseveralmethodsofdefensewereproposed,yettheplexitytotheedge.Whilethisdesignprincipleallowedthisproblemstilllacksacompletesolution.Wepresentase-packetswitchedinter-networktoscale
4、toitscurrentsize,itlectivesurveyofproposeddefensemechanismsandshowalsointroducesanumberofproblems,oneofthembeingpossibleresearchdirections.theabovementionedabilitytospoofpackets.Transport/applicationlayermisbehaviorisspecifictotheapplication/protocolinvolv
5、ed.However,theimportant1Introductionapplicationsandprotocolsthatareatthebaseofthecor-rectfunctioningoftheInternet,likeTCPorDNSarethemosttargetedbyattackers,becausetheymustbedeployedAstheInternetgrewthroughtheyearstoit’scurrentsizeonallconnectedhosts.Thepr
6、otectionagainstthesetypesofandbecameacommodity,itsuserbasechangedfromthatmisbehaviorisalsoapplicationspecific,withsomeofthemofscientists,financialinstitutionsandmilitarytovirtuallyeasiertosecure,otherquitedifficult.anyonewithadesiretobeconnected.Theuserbasen
7、owre-Oneofthemostcommontypesofmisbehavioristhesemblessocietyingeneral,andsocialrulesshowedusthatdenial-of-serviceattack.whereverthere’sagroupofpeopletherewillbedisagree-mentandconflict.OntheInternetthismanifesteditself1.1Definitionwithflamewarsonnewsgroupsan
8、de-maillists,websitedefacement,viruses,worms,andsoon.Someoftheearlyattackswereonlyameansforhackerstogetfameandatten-Ingeneraltermsdenial-of-serviceoccurswhenanentitytion,playpranksoneachother,butitgraduallyreachedth
