Physical Interface Device的意思|示意

The various network device drivers run at the interface layer, which receives and transmits data from and to the physical link.

各种网络设备驱动程序在接口层运行，该层从物理链路接收数据，并向物理链路传输数据。

Below the buffer cache are the device drivers, which implement the interface for the particular physical device.

缓冲区缓存之下是设备驱动程序，它实现了特定物理设备的接口。

If an IP was accidentally configured on this physical interface and it was part of a SEA configuration, the SEA may fail to configure as the physical device is already in use.

如果在这个物理接口上配置了IP，而且它属于SEA配置，SEA的配置就可能失败，因为这个物理设备已经在使用了。

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)。

Then, at least one logical interface will be linked to this physical device, such as en0 or et0, on which the IP address will be configured.

至少有一个逻辑接口与这个物理设备链接，比如en0或et0，在逻辑接口上配置IP地址。

The PHY (physical layer) provides the electrical and mechanical interface between the device and the cable and ensures that all devices have fair access to the bus.

物理层为设备提供了一个物理和电气接口，保证总线上的所有设备都能公平地访问总线。