简单地说，这个驱动程序提供对以太网设备的用户空间访问，这样就可以发送和接收数据包。
In short, this driver provides user-space access to the Ethernet device so that packets can be transmitted and received.
以RX和TX开头的行很重要，它们提供关于发送和接收的数据包的信息。
The important rows are those beginning RX and TX, which show information about the packets sent and received.
使用以太网交换机，不会将数据包发送到所有端口，但是许多最新的交换机都提供了一个管理端口，该端口会将信息发送到所有的端口。
With Ethernet switches, packets are not echoed to all ports, but many modern switches provide a management port where the information is echoed.
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