张伟抓包实验.docx
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张伟抓包实验.docx
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张伟抓包实验
计算机网络抓包分析
专业:
10网络1班姓名:
张伟学号:
10205050109
本软件连接CMCC-EDU的网,出现的不是本校的IP地址
Thepictureaboveisthebeginningofthissoftware-KeLai.wecanclick“begin”buttontostart,thenwhenwehavefinishedvisitsomewebpages,thenclick“finish”button.
Afterwefinishcatchdatagram,thepictureaboveisthecomprehensiveanalysisaboutdatagram.Fromthispicture,wecaninferthatthetimewhenIcatchit,thepicturebehindistheIPaddresstotalflow(left)andapplicationlayerprotocol(right)(unit:
Byte),forexample:
HTTP.Totalbyte:
6.771KB
ThispictureisaboutalltheprotocolwhatIhavecatchedandhowlongIhavecatched.itincludesIP(includeTCP:
1.698MB,HTTP:
1.689MB,HTTPS:
5312KB,HTTPproxy:
3107KB,Other:
391B),UDP(DNS62324KB(Response:
35010KB,Query:
27077KB,Error:
243B,Other:
760B))ICMP:
220B(TimeExceed:
220B)
ThispicturemainlytellussomeinformationaboutEthernettype,frompicturewecanconcludedestinationAddressis01005E0000FC,sourceAddressis0026C6A644D2.
IP-Internetprotocolversion:
4;Headerlength:
5;Totallength:
40;identification:
0x6650
Theshallowofdataisthespecificdataofupdata.sourceAddress10.245.88.63destinationAddressis111.1.57.44.
Thispictureincludesthefollowinginformation
1)thisisaboutUserDatagramProtocol
2)sourceport:
56265
3)destinationport:
5355
4)length:
32
5)checksum:
0xC955
6)others
ThispictureisaboutUDPprotocol.fromthisprotocolwecaninferprotocolversionis4,headerlengthis5,differentiatedservicefield:
00000000itconcludecodepointandcongestion
ThedataofIPinternetprotocolis450000342689000001114F000AF5583FE00000FC.
ThispictureissomeinformationaboutNBNS.itincludesidentification:
0xF610,codeandflag:
0000000100010000(containsquery/response;operatorcode;authortativeanswer;truncationandrecursiondesiredandsoon),wecanseethecodeofthisdataisF610011000100000000000020454A464445424645454246414341434143414341434141410000200001.
ThisisaboutARPProtocol(addressresolutionprotocol).inthisprotocolweknowthathardwaretype:
1,protocoltype:
0x0800,hardwareaddresslength:
6,protocoladdresslength:
4,sourcephysics:
38:
22:
D6:
D7:
48:
74,sourceIP:
10.245.80.3,destinationphysics:
00:
00:
00:
00:
00:
00,destinationIP:
10.245.80.3.behindtheanalysisisthecodeaboutallprotocol.
ThisisDHCPprotocol(dynamichostconfigurationprotocol).itincludemagiccookie:
1669485411,DHCPmessagetype(operationcode:
53,operationlength:
1,messagetype:
6).serveridentifier(operationcode:
54,operationlength:
4,selectserverIP:
10.245.80.3)andoptionend(operationcode:
255)andothermessages.
Thispictureisaboutmatrix.Idonotknowmuchaboutthis.Matrixanalysisistopackagesoftwareprovidesagraphicalstatisticstools.Itcandetailgiveninthisdataaccessbetweennodestopology,basedonlocalrootnodespreadingaround,itcanbedividedintophysicalnodesandIPV4nodesconversationanalysis,candetailedgiveeachnode'sIPaddress,MACaddress,domainnameandthesizeofthesendingandreceivingdatapackets,thediagramwiththeconnectionbetweenthelinestodescribethenodebetweenthesessionandmakethecommunicationprocessismorespecific.
THEEND
THANKYOU!
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