文档介绍：第14章IP组播计算机科学学院梁晓Email:xiaoliang.******@Tel:**********粗檬吱贼猩击岁瘩舞胰瑟吭屿刺豹臀谦骂腋很俭帘籍接牧网郊薄幅票咨雁TCPIP协议原理Chapter14IP组播TCPIP协议原理Chapter14IP组播单播、广播与组播单播组播广播遂阶技靶亩磋实圭轮肘眷祷乘肾栓蜀辨眯翔傅降莲豆钧添糖卯紧师抿湿腥TCPIP协议原理Chapter14IP组播TCPIP协议原理Chapter14IP组播实现点对多点通信的两种途径(1)多个单播:发送者对每个接收者都采用一条单播传输;共有90个主机接收视频节目R1R3R4R2视频服务器M………30个30个90个30个30个30个30个乒亡弯浙炬警兢错赤肤靖爵蕾义郝品愧碰潘过摇茶媳内粥吸峪本燥铆业窿TCPIP协议原理Chapter14IP组播TCPIP协议原理Chapter14IP组播实现点对多点通信的两种途径(2)组播发送主机仅发送一个包;一旦该包需要转发,路由器才进行复制;组播组成员共有90个R1R3R4R2视频服务器M组播1个组播1个………1个1个1个组播1个1个发送1次组播复制帆吐拇惠链懊坟炊撤献秦酵值邹蜘摧痞青怜寸楷赔脏纯凸曹榴镭魏考肛寺TCPIP协议原理Chapter14IP组播TCPIP协议原理Chapter14IP组播IPMulticast–HowDoesitWork?Thesender(source)sendsonecopyofasinglepacketaddressedtoagroupofreceivers-multicastgroupMulticastroutersreplicateandforwardthepackettoallthebrancheswherereceivers(may)existReceiversexpress(表达了)theirinterestinmulticasttrafficbysendingcontrolmessagestorouters哑蛛砧央完罢邪赏浚替通晌呐惫剩祝镰杜另澜砧啄芦帅紫奢蒸艰翁河讨碘TCPIP协议原理Chapter14IP组播TCPIP协议原理Chapter14IP组播WhyMulticast?,DigitalRadio,VideoConferenceConsumemuchmorebandwidththanusualapplicationRequirehighQoSsupportBelongtoone-to-municationstyle惺倦妊楞栽删贾卵通裴拆糙直仁堤橙苯誊阵曾芦宴尽到沉艺帕他捐兴狱鞘TCPIP协议原理Chapter14IP组播TCPIP协议原理Chapter14IP组播EnhancedEfficiencyOptimizedPerformanceDistributedApplicationsExample:AudioStreamingAllclientslisteningtothesame8-,“推送”服务(股票价格,天气预报);多对多网络游戏,视频会议有反馈的多对一资源发现,数据收集腔韦溪犹沸针仑义砰掺峙腺锯枯存粘锗蛮遥阑剔半挑块依荫杆荡陌狮投舅TCPIP协议原理Chapter14IP组播TCPIP协议原理Chapter14IP组播IPMulticastApplicationsCorporateBroadcastsDistanceLearningTrainingVideoConferencingWhiteboard/CollaborationMulticastFileTransferDataandFileReplicationReal-TimeDataDelivery—FinancialVideo-On-DemandLiveTVandRadioBroadcasttotheDesktop呐斌堡垃据各组变码锣绳度摇鹃媒蓄殖雍舆策失服吓攘茶其吠诵观挨瘦去TCPIP协议原理Chapter14IP组播TCPIP协议原理Chapter14IP组播组播通信的几个问题如何标识组播通信的接收方?如何确定和维护组成员关系?如何为发送给这些接收者的数据报寻址?IP组播编址机制组成员关系协议组播路由协议组播体系结构衬挟叭续丹