计算机网络自顶向下方法试验三报告

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1、陕西师范大学　计算机网络　实验报告年级：2010级姓名：　陈翠萍　　学号：41012227实验日期：2012.9.24实验名称：WiresharkLab:HTTP1至7题总的截图：1.IsyourbrowserrunningHTTPversion1.0or1.1?WhatversionofHTTPistheserverrunning?Answer:BotharerunningHTTP1.12.Whatlanguages(ifany)doesyourbrowserindicatethatitcanaccepttotheserver?Answer:z

2、h-cn3.WhatistheIPaddressofyourcomputer?Ofthegaia.cs.umass.eduserver?Answer:MyIPaddressis10.2.136.49andtheserver’sis128.119.245.124.Whatisthestatuscodereturnedfromtheservertoyourbrowser?Answer:截图HTTP/1.1200OK(text/html)5.WhenwastheHTMLfilethatyouareretrievinglastmodifiedatthes

3、erver?Answer:截图：Last-Modified:Mon,24sep201212:44:01GMT6.Howmanybytesofcontentarebeingreturnedtoyourbrowser?Answer:截图Content-Length:1287.Byinspectingtherawdatainthepacketcontentwindow,doyouseeanyheaderswithinthedatathatarenotdisplayedinthepacket-listingwindow?Ifso,nameone.Answ

4、er:Noalloftheheaderscanbefoundintherawdata.8至11题截图：8.InspectthecontentsofthefirstHTTPGETrequestfromyourbrowsertotheserver.Doyouseean“IF-MODIFIED-SINCE”lineintheHTTPGET?Answer:No9.Inspectthecontentsoftheserverresponse.Didtheserverexplicitlyreturnthecontentsofthefile?Howcanyout

5、ell?Answer:Yes，becausewecanseethecontentsintheLine-basedtextdatafield.10.NowinspectthecontentsofthesecondHTTPGETrequestfromyourbrowsertotheserver.Doyouseean“IF-MODIFIED-SINCE:”lineintheHTTPGET?Ifso,whatinformationfollowsthe“IF-MODIFIED-SINCE:”header?Answer:截图：Yes.Theinformati

6、onfollowingis:mon,24sep201212:44:01GMTwhichisthedateofthelastmodificationofthefilefromthepreviousgetrequest11.WhatistheHTTPstatuscodeandphrasereturnedfromtheserverinresponsetothissecondHTTPGET?Didtheserverexplicitlyreturnthecontentsofthefile?Explain.Answer:截图：Thestatuscodeand

7、phrasereturnedfromtheserverisHTTP/1.1404NotModified.Theserverdidn’treturnthecontentsofthefilesincethebrowserloadeditfromitscache.