用Wireshark进行IP协议分析

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1、TCP/1P实验报告头验4用Wireshark进行IP协议分析院业级名号学专班姓学计算机学院网络工程1班刘小芳410090401272012.54.1实验性质木实验为操作分析性实验。4.2实验目的1.掌握Wireshark软件的基本使用方法。2.掌握基木的网络协议分析方法。3.使用Wireshark抓包工具，分析IP数据报的格式。4.加深理解IP协议的原理及其工作过程。4.3实验环境1.硬件环境：pc机1台。2.网络环境：PC机接入LAN或Interneto物理地址：00-E0-4C-00-16-78Ip地址：192.168.0.

2、1313.软i牛坏境：Windows操作系统和Wireshark软件。4.4实验学时1・Capturingpacketsfromanexecutionoftraceroute2.AlookatthecapturedtraceWhatistheIPaddressofyourcomputer?2.WithintheIPpacketheader,whatisthevalueintheupperlayerprotocolfield?3.HowmanybytesareintheIPheader?Howmanybytesareinthepay

3、loadoftheIPdatagram?Explainhowyoudeterminedthenumberofpayloadbytes.4.HasthisIPdatagrambeenfragmented?Explainhowyoudeterminedwhetherornotthedatagramhasbeenfragmented.UsethedownarrowonyourkeyboardtomovethroughtheICMPmessagessentbyyourcomputer.5-WhichfieldsintheIPdatagra

4、malwayschangefromonedatagramtothenextwithinthisseriesofICMPmessagessentbyyourcomputer?6.Whichfieldsstayconstant?Whichofthefieldsmuststayconstant?Whichfieldsmustchange?Why?7.DescribethepatternyouseeinthevaluesintheIdentificationfieldoftheIPDatagramNext(withthepacketsst

5、illsortedbysourceaddress)findtheseriesofICMPTTLexceededrepliessenttoyourcomputerbythenearest(firsthop)router.8.WhatisthevalueintheIdentificationfieldandtheTTLfield?9.DothesevaluesremainunchangedforalloftheICMPTTL-exceededrepliessenttoyourcomputerbythenearest(firsthop)

6、router?Why?FragmentationSortthepacketlistingaccordingtotimeagainbyclickingontheTimecolumn.10・FindthefirstICMPEchoRequestmessagethatwassentbyyourcomputerafteryouchangedthePacketSizeinpin^plottertobe2000・HasthatmessagebeenfragmentedacrossmorethanoneIPdatagram?11.Printou

7、tthefirstfragmentofthefragmentedIPdatagram.WhatinformationintheIPheaderindicatesthatthedatagrambeenfragmented?WhatinformationinHowlongisthisIPdatagram?12.PrintoutthesecondfragmentofthefragmentedIPdatagram・WhatinformationintheIPheaderindicatesthatthisisnotthefirstdatag

8、ramfragment?Arethemorefragments?Howcanyoutell?13.WhatfieldschangeintheIPheaderbetweenthefirstandsecondfragment?Nowfindthefir