tracerttracert读音

ExercisesARPICMPDNSHTTP/TCPTraceanalysisARPlaunchWiresharkipconfig/all;seelocalIPandgatewayroute-print;findgatewayarp-a;listallMACaddresseslearnedarp-d*;deleteallMACaddresslearnedpingwww.
polyu.
edu.
hkWhatistheMACaddressoftherouter*HintsIfthedefaultgateway/router'sMACaddressisnotinthecache,thehostwillsendARPtoaskforit.
Thedefaultgateway'sIPaddressispre-configuredorlearntthroughtheDHCPprotocol.
*ICMPpingwww.
polyu.
edu.
hkhttp://www.
networksorcery.
com/enp/protocol/icmp.
htmWhatisthevalueof'Type'intheoutgoingICMPpacketWhatisthevalueof'Type'intheincomingICMPpacketTakealookatthedatasectionintheincomingICMPpacket.
tracertwww.
polyu.
edu.
hkWhataretheanswerstotheabovetwoquestions*HintsPingSend:ICMPEchoRequestReceive:ICMPEchoReplyTracerouteSend:AndkindofIPpacketwithspecialTTLItwouldbeanICMPpacketifweneedthereplyfromthedestinationReceive:ICMPTimeExceeded*DNSnslookupwww.
polyu.
edu.
hkTakealookatDNSqueryandresponsepacketsnslookupsettype=PTR158.
132.
19.
132TakealookatDNSqueryandresponsepackets*Hintssettype=A(defaultsetting)NormalDNSlookup:gettheIPaddressfromahostnamesettype=PTRReverseDNSlookup:getthehostnamefromitsIPaddress*HTTP/TCPUsebrowsertovisitwww.
polyu.
edu.
hkTakealookatTCP'sthree-wayhandshakesequencenumbersinpacketsfromtheserverandtheacknowledgementnumberinpacketsfromtheclientHTTPheaderinthepacketfromtheclientHTTPheaderinthepacketsfromtheserver*TraceanalysisRealtracefromaVoIPhackingdemoAnalyzethetraceusingWiresharkandanswerthefollowingquestionsWhich4protocolsareinvolvedinthepcapWhichcodecdoestheRTPstreamuseHowdidtheattackergainaccesstotheserverWhereisthehackedserverTips:lookintothepayload*Hints4Protocols:HTTP,RTP,RTCP,SIPRTPusesG.
7111PCMUcodingDefaultusername/passwordAuthorization:BasicbWFpbnQ6cGFzc3dvcmQ=ThecityisDISTRITOFEDERALMEXICOHearitTelephony->RTP->StreamanalysisPublicIP:132.
248.
255.
82inanHTTPresponseFollowHTTPconnectionsLookintotheHTTPresponsesUseGeolocationwebsitestolocatethecity*UsefullinksProtocolshttp://www.
networksorcery.
com/enp/default1101.
htmWiresharkhttp://www.
wireshark.
org/download/docs/user-guide-a4.
pdfTCPDumphttp://www.
tcpdump.
org/tcpdump_man.
html