A20B-1003-0045

快速以太网： 快速以太网（Fast Ethernet）也就是我们常说的百兆以太网，它在保 持帧格式、MAC（介质存取控制）机制和MTU（最大传送单元）质量的前 提下，其速率比10Base－T的以太网增加了10倍。二者之间的相似性使 得10Base－T以太网现有的应用程序和网络管理工具能够在快速以太网 上使用。快速以太网是基于扩充的IEEE802.3标准。 千兆以太网：

A20B-1003-0045

联系人：郭先生
联系电话：18971415643《优先》
座机：027-83238871
传真：207-61537051
QQ：810334512《优先》

A20B-1003-0045

以太网的工作原理 以太网采用带冲突检测的载波帧听多路访问（CSMA/CD）机制。以太网 中节点都可以看到在网络中发送的所有信息，因此，我们说以太网是一 种广播网络。 以太网的工作过程如下： 当以太网中的一台主机要传输数据时，它将按如下步骤进行： 1、监听信道上是否有信号在传输。如果有的话，表明信道处于忙状态 ，就继续监听，直到信道空闲为止。 2、若没有监听到任何信号，就传输数据 3、传输的时候继续监听，如发现冲突则执行退避算法，随机等待一段 时间后，重新执行步骤1（当冲突发生时，涉及冲突的计算机会发送会 返回到监听信道状态。 注意：每台计算机一次只允许发送一个包，一个拥塞序列，以警告所有 的节点）

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