correlating topology and path characteristics of overlay networks and the internet

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1、SUBMITTED,DEC20051CorrelatingTopologyandPathCharacteristicsofOverlayNetworksandtheInternetAlexandruIosup,PawełGarbacki,JohanPouwelse,andDickEpemaDelftUniversityofTechnology,FacultyofElectricalEngineering,Mathematics,andComputerScienceP.O.Box5031,2600GADelft,TheNetherlandsEmail:p2p@ewi.tudelft.nlA

2、bstract—Real-worldIPapplicationssuchasPeer-to-Peerfile-thatcanactivelymeasureatP2PandInternetchar-sharingarenowabletobenefitfromnetworkandlocationacteristicsthesametime?Howtoselectarepresen-awareness.ItisthereforecrucialtounderstandtherelationtativepartoftheP2Pnetworkformeasuring?betweenunderlayand

3、overlaynetworksandtocharacterizeCharacterizingoverlaynetworksandtheirusersthebehaviorofrealuserswithregardtotheInternet.Forthispurpose,wehavedesignedandimplementedMULTIPROBE,Wherearetheoverlaynetworkuserslocated?Whataframeworkforlarge-scaleP2Pfile-sharingmeasurements.isthegeographicaldistributiono

4、ftraffic?WhatisUsingthisframework,wehaveperformedmeasurementsoftheconnectivityamongtheusers?Whatistheappli-BitTorrent,whichiscurrentlytheP2Pfilesharingnetworkwithcationthroughput?thelargestamountofInternettraffic.WeanalyzeandcorrelateCorrelatingunderlay/overlaymeasurementsthesemeasurementstoproviden

5、ewinsightsintothetopology,theconnectivity,andthepathcharacteristicsoftheInternetWhatisthetopology,andwhatarethecharacteristicspartsunderlyingP2Pnetworks,aswellastopresentuniqueofthosepartsoftheInternetthatactastheBitTorrentinformationontheBitTorrentthroughputandconnectivity.underlay?Whatarethepor

6、tsonwhichBitTorrenttrafficispresent?ThemaincontributionofourworkisthatwepresentaI.INTRODUCTIONcorrelatedviewofthedominantoverlaynetworkandtheInter-net,basedonmeasurementstakeninMay2005.Furthermore,ThetopologyandthecharacteristicsoftheInternethavewereleasetothecommunitytheacquireddatasets,enablinga

7、largeimpactontheoperationofInternetapplicationssuchresearcherstovalidatetheirmodelsagainstrealdataand/ortoasmulticastoverlays[1],webhosting[2],andPeer-to-Peerimprovetheirmodelswithrealisticparameters.(P2P)file-sharingsy