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1、实验四一、实验名称:二、实验目的:三、实验环境：:http时延估计:了解HTTP传输过程中的时延。运行 Windows 2002/2003 Server/XP ，java虚拟机，分组交换java小程序。四：实验记录:实验 开始日期：201111-1710:00实验结束时间：2011-11-1712： 00实验地点：3603实验人：liu_chu n实验条件java 小程序。运行 Windows 2002/2003 Server/XP 。实验步骤Sliu 唆! imrMlhuM*蚁刊01帕如TlaoserirtEf M 妙目 conacrs1T2hDO9P 阳也ed (ramson My (in
2、 RTTsJiijo mrTcts TTslt &C.加；呱】；匸：加：1川澈林弋d=duett HTMLpiequeElOel- :uelohed3iiiet勺 TTiEtmfa 帥1、基本概念：HTTP超文本传输协议(HTTP, HyperText TransferProtocol)是互联网上应用最为广泛的一种网络协议。所有的WWW文件都必须遵守这个标准。设计HTTP!初的目的是为了提供一种发布和接收HTM页面的方法。2 :熟悉实验环境，实验之前，要设定个项参数，如上图所示:实验现象注释:Non-PC (Non-Persistent Connections)Non-PCwPCo n-Per
3、siste nt Conn w Parallel Co nn)PCw/oP (Persiste nt Connections w/o Pipeli ning) PCwPPersiste nt Connections w Pipeli ning)见下表：per-objectconnectiontypenumber of parallel connectionnumber of objecttransmissi on delay(in Rtts)TOTALDELAY RttsNon-PC1104Non-PC1206Non-PC1308Non-PC14010Non-PC110.254.5Non-PC
4、110.55Non-PC1116Non-PC1128Non-PC120.256.75Non-PC120.57.5Non-PC1219Non-PC12212Non-PC130.259Non-PC130.510Non-PC13112Non-PC13216Non-PC140.2511.25Non-PC140.512.5Non-PC14115Non-PC14220Non-PCwPC1104Non-PCwPC110.254.5Non-PCwPC110.55Non-PCwPC1116Non-PCwPC1128Non-PCwPC1206Non-PCwPC120.256.75Non-PCwPC120.57.5
5、Non-PCwPC1219Non-PCwPC12212Non-PCwPC1308Non-PCwPC130.259Non-PCwPC130.510Non-PCwPC13112Non-PCwPC13216Non-PCwPC14010Non-PCwPC140.2511.5Non-PCwPC140.512.5Non-PCwPC14115Non-PCwPC14220Non-PCwPC2104Non-PCwPC210.254.5Non-PCwPC210.55Non-PCwPC2116Non-PCwPC2128Non-PCwPC2204Non-PCwPC220.254.5Non-PCwPC220.55Non
6、-PCwPC2216Non-PCwPC2228Non-PCwPC2306Non-PCwPC230.256.75Non-PCwPC230.57.5Non-PCwPC2319Non-PCwPC23212Non-PCwPC2406Non-PCwPC240.256.75Non-PCwPC240.57.5Non-PCwPC2419Non-PCwPC24212Non-PCwPC3104Non-PCwPC310.254.5Non-PCwPC310.55Non-PCwPC3116Non-PCwPC3128Non-PCwPC3204Non-PCwPC320.254.5Non-PCwPC320.55Non-PCw
7、PC3216Non-PCwPC3228Non-PCwPC3304Non-PCwPC330.254.5Non-PCwPC330.55Non-PCwPC3316Non-PCwPC3328Non-PCwPC3406Non-PCwPC340.256.75Non-PCwPC340.57.5Non-PCwPC3419Non-PCwPC34212Non-PCwPC4104Non-PCwPC410.254.5Non-PCwPC410.55Non-PCwPC4116Non-PCwPC4128Non-PCwPC4204Non-PCwPC420.254.5Non-PCwPC420.55Non-PCwPC4216No
8、n-PCwPC4228Non-PCwPC4304Non-PCwPC430.254.5Non-PCwPC430.55Non-PCwPC4316Non-PCwPC4328Non-PCwPC4404Non-PCwPC440.254.5Non-PCwPC440.55Non-PCwPC4416Non-PCwPC4428PCw/oP1103PCw/oP110.253.5PCw/oP110.54PCw/oP1117PCw/oP11210PCw/oP1204PCw/oP120.254.75PCw/oP120.55.5PCw/oP1217PCw/oP12210PCw/oP1305PCw/oP130.256PCw
9、/oP130.57PCw/oP1319PCw/oP13213PCw/oP1406PCw/oP140.257.25PCw/oP140.58.5PCw/oP14111PCw/oP14216PCwP1103PCwP110.253.5PCwP110.54PCwP1115PCwP1127PCwP1203PCwP120.253.520.5421522730330.253.530.5431532740340.253.540.54415427connection =numberofPCwP1PCwP1PCwP1PCwP1PCwP1PCwP1PCwP1PCwP1PCwP1PCwP1PCwP1PCwP1PCwP1
10、五、实验结果分析1,由 Non-PCwP数据分析可得，当 number of parallel objects,the results are same.the result are follows:the object transmission delay(in Rtts)Total delay(in Rtts)2,由 PCw/oP可知，number of objectsRtts) 越大，其 Total delay(in Rtts)0 0.250.51 24 4.556 8越多的同时 the object transmission delay (in就越大，反之越小。3、HTTP专输有不同的选择。当http 连接建立之后，页面包含的对象可以选择独立或并行专输.
