The link layer provides the physical interface to the communication medium (such as an Ethernet device).

链路层(link layer)提供了通信介质的物理接口(例如以太网设备)。

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In short, this driver provides user-space access to the Ethernet device so that packets can be transmitted and received.

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。

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Examples of devices at this layer include the SLIP driver over a serial interface or an Ethernet driver over an Ethernet device.

例如，包串口使用的SLIP驱动程序以及以太网设备使用的以太网驱动程序都是这一层的设备。

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The BC2 also provides one ethernet port, so if you have an ethernet-only device, just plug it into the router.

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Finally, the security gurus took a device popular in the US, and used non-encrypted ethernet communication between the terminal and other peripherals to hack into the payment device and take root control.

ENGADGET: Security experts hack payment terminals to steal credit card info, play games

Moreover, since it is a stateless device, you can unplug it from one Ethernet port, plug it back in somewhere else, and continue working.

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