假设各主机已经知道网络中其他主机的MAC地址，无需进行ARP。当A首先转发消息的时候，交换机会先把A记下来，然后把对应的端口1也记下来，这就是交换机的自学习。B获得之后，知道是发送给自己的帧，就会接受。同时记录A的mac地址。需要注意的是，交换表中的每个记录都有自己的有效时间，到期了就会自动删除的。这是因为，MAC地址与交换机接口不是永久性的。如果电脑更换了网卡，就会更换mac地址。ARP高速缓....

文章 2017-07-04 来自：开发者社区

《VMware 网络技术：原理与实践》—— 3.3　扩展以太网段：中继器、集线器和交换机

本节书摘来自华章出版社《VMware 网络技术：原理与实践》一书中的第3章，第3.3节，作者：（美）Christopher Wahl　Steven Pantol，更多章节内容可以访问云栖社区“华章计算机”公众号查看。 3.3　扩展以太网段：中继器、集线器和交换机我们在表3.1中已经看到，每个物理以太网标准都有最大电缆长度，这种距离限制的原因和穿越介质时电信号的衰减（attenuation）有....

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更新时间 2024-03-26 11:31:25

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