当eternet交换机采用改进的直接交换方式时,他接受到帧的钱多少字节改变?
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解决时间 2021-04-08 17:13
- 提问者网友：却不属于对方
- 2021-04-07 16:43
当eternet交换机采用改进的直接交换方式时,他接受到帧的钱多少字节改变?
最佳答案
- 五星知识达人网友：摆渡翁
- 2021-04-07 18:03
直通式转发不会修改帧的内容，理论上只收到DA的6个字节，就进行转发了，但实际会多读几个字段，因为需要QOS，VLAN这些信息。
这是cisco的一段话：
In theory, a cut-through switch receives and examines only the first 6 bytes of a frame, which carries the DMAC address. However, for a number of reasons, as will be shown in this document; cut-through switches wait until a few more bytes of the frame have been evaluated before they decide whether to forward or drop the packet.
这是cisco的一段话：
In theory, a cut-through switch receives and examines only the first 6 bytes of a frame, which carries the DMAC address. However, for a number of reasons, as will be shown in this document; cut-through switches wait until a few more bytes of the frame have been evaluated before they decide whether to forward or drop the packet.
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