《tcp_ip协议分析》魏刘宏11054126实验1数据链路层和ip层数据包分析

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1、学院计算机学院专业网络工程指导教师胡维华/黄杰学生姓名魏刘宏学号11054126实验日期2013.11一.以太帧格式的分析1•抓取方法描述第—步：打开wireshark抓包软件，开始抓包。第二步：在电脑（本机192.168.137.1）命令提示符下ping—下本局域网内的某台开启的主机的地址（192.168.137.2）第三步：分析抓取的icmp包的格式。2.记录抓取的过程：第一步（选取网络）:★本接T2[Wireshark1.10.2(SVNRev51934from/trunk-1.10)]Wireshark：Cap

2、tureInterfaces

3、Capture]AnalyzeStatisticsTelephonyJools{rternalsHelp画直e72l

4、S

5、S

6、i■溪I回第二步（ping目标主机）::MJsersliuhong>ping192.168.137.2在自自自自Ping192192.168.192.168.192.168.192.168..168137.137.137.137.7V.3AtfAWUAH.1■ImsTTL=64-32B"

7、B]=71nsTTL=64=32:于T-32时

8、8=5nsTTL=64772

9、msTTL=64192.168.137.2的Pins统计信息：裁堀色丄耳孩送-izem-4,丢失-0<0^丢失〉,往返锂呈的估计帘卵以量秒为葷位〉:取短=Ins,販长=172ns,平均=62ms3.抓取数据的内容ICMP报文:19883.8591050192.168.137.1192.168.137.2ICMP74Echo(ping)requestid»0x0001f19983.8640630192.16&137.220084.8903180192.16&137.120185.0626310192.16&137.219

10、2.168.137.1192.168.137.2192.168.137.1ICMPICMPICMP74Echo(ping)74Echo(ping)74Echofoina^replyrequestreolvid-OxOOOl,id-OxOOOlfid«0x0001.seseses田s曰Frame198:74bytesonwire(592bits)t74bytescaptured(592bits)oninterface0EthernetIItSrc:52:f8:da:a4:a3:22(52汁8:da:a4:a3:22)9D

11、st:AmoiElec_c4:el:49(00:12:40:c4:el:49)InternetProtocolversion4tSrc:192.168.137.1(192.168.137.1).Dst:192.168.137.2(192.16&137.2)internetcontrolMessageProtocolType:8(Echo(ping)

12、request)类型Code:0代冯Checksum:0x41b0"[correct]校验和Identifier(BE):1(0x0001)Identifier(LE):2

13、56(0x0100)Sequencenumber(BE):2987(OxObab)Sequencenumber(LE):43787(OxabOb)数据部分「R€SDor>seframe:1991$Data(32bytes)以太帧:No・TimeSourceDestination/on•丿丿vnudu丿止•■o•ua•・an•wmiwvieiv•ex•—nProtocolLengthInfoM»trfaxuo.x^/•xi>au•io•ua.cih.•cc19883.8591050192.168.137.1192.168

14、.137.2ICMP74"ho(pTng)「QquQSti“0x0001.seq・2987/43787.19983.864168.137.2192.168.137.1ICMP74EchoCoina)reolvid-OxOOOl.sea-2987743787.ttl-64SFrame198:onwire(592bits)f74bytescaptured(592bits)oninterface0interface大小Encapsulationtype:Ethernet⑴ArrivalTime:Nov9.201310:44:

15、10.754687000阿阿阿肚111?ifTTl[TimeEpoch[Time[Time[TimePrameFrameCaptureLength:74bytes(592bits)[Frameismarked:False][Frameisignored:False][Protocolsinframe:eth:ip:icmp:dat