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什么是二层转发和三层路由？ #10

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SampsonKY opened this issue Oct 4, 2020 · 0 comments

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SampsonKY commented Oct 4, 2020

什么是二层转发和三层路由？

二层转发：这里应该用的为OSI分层模型，那么这里的二层指的是数据链路层，则是获取了数据的头部信息后，根据目标的MAC地址，进行本地的转发和广播（根据MAC地址选择发哪）也可指交换机
三层路由：指的是网络层，则是设备工作在IP层，通过分析数据包头部信息，得到IP地址，根据网段范围，进行本地转发或选择下一个网关（也就是判断是否IP处于一个范围，不是就下一个再看）指路由器或者有路由功能的交换机

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