文章目录第三章数据链路层3.8 集线器与交换机总结第三章数据链路层3.8 集线器与交换机使用集线器HUB 的以太网在逻辑上仍是一个总线网，各站共享总线资源，使用的还是 CSMA/CD 协议（半双工）。集线器只工作在物理层，它的每个接口仅简单的转发比特，不进行碰撞检测（由各站的网卡检查）。集线器一般都有少量的容错能力和网络管理能力。使用集线器在物理层扩展以太网。交换机通常都有多个....

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