以下关于网桥和交换机的区别叙述中，正确的是（ ）。
- A.交换机主要是基于软件实现，而网桥是基于硬件实现的
- B.交换机定义了广播域，而网桥定义了冲突域
- C.换机根据IP地址转发，而网桥根据MAC地址转发
- D.交换机比网桥的端口多，转发速度更快
正确答案及解析
正确答案
解析
交换机和网桥都是二层设备，网络是基于软件的方式实现，交换机是基于硬件实现。交换机和网桥都分割冲突域，每一个接口就是一个冲突域。交换机和网桥都是基于MAC地址进行转发，交换机比网桥的端口多，而且转发速度更快。
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