现代交换技术-第4章分组交换技术.pptx

PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;4.1概述;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;4.2分组交换原理;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;4.2.1统计复用;SynchronousTDM;AsynchronousTD;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;4.2.2逻辑信道;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;4.2.3虚电路与数据报;1．虚电路方式;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;2．数据报方式;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;4.2.4路由选择;2．路由选择算法;2．路由选择算法;洪泛法(flooding);随机路由选择;固定路由表算法;PowerPoint演示文稿;PowerPoint演示文稿;（2）自适应路由选择。;PowerPoint演示文稿;PowerPoint演示文稿;4.2.5流量控制与拥塞控;PowerPoint演示文稿;PowerPoint演示文稿;2．流量控制的层次;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;3．流量控制方法;Slidewindows;SlidingWindow;缓冲区预约;许可证法;4．拥塞控制方法;4．拥塞控制方法;PowerPoint演示文稿;PowerPoint演示文稿;CongestionMana;4.3X.25建议;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;4.3.1分层协议结构;1．站类型;（1）主站：负责控制链路的操作;（2）从站：在主站的控制下操作;（3）复合站：兼具主站和从站的;2．链路配置;3．数据传送模式;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;4.3.2LAPB的帧结构;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;4.3.3链路层操作过程;PowerPoint演示文稿;PowerPoint演示文稿;4.3.4分组层;PowerPoint演示文稿;PowerPoint演示文稿;1．分组单元格式;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;2．分组层操作过程;PowerPoint演示文稿;PowerPoint演示文稿;（2）SVC数据传输阶段。;（3）SVC的呼叫清除过程。;4.4帧中继技术;PowerPoint演示文稿;PowerPoint演示文稿;1．数据传送协议大为简化;2．用户平面和控制平面的分离;4.4.2协议结构与帧格式;PowerPoint演示文稿;1．帧结构;PowerPoint演示文稿;PowerPoint演示文稿;2．帧中继相关协议;PowerPoint演示文稿;4.4.3帧中继交换原理;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;1．永久虚电路PVC;PowerPoint演示文稿;2．连接标识DLCI;3．帧中继交换操作;4.4.4带宽管理和拥塞控;1．带宽管理;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;2．拥塞控制;PowerPoint演示文稿;4.5ATM交换技术;PowerPoint演示文稿;PowerPoint演示文稿;PowerPoint演示文稿;（3）ATM是支持多业务的传输;（4）AT