A down state would indicate a possible bad cable or network switch port.

如果Link state为down，那么就显示网线或网络交换机端口可能有问题。

youdao

MAC Address binding with the switch port is one function of switch port security management.

MAC地址与交换机端口绑定是交换机端口安全管理功能之一。

youdao

The first thing you should do is make sure all servers are locked down to the highest speed possible using full duplex and the switch port is set to match.

应该做的第一件事是，确保所有服务器使用全双工和最高的网络速度，并相应地匹配交换机端口。

youdao

This includes broadband Internet connectivity, two VoIP ports, home networking via a four-port, 11n wireless switch, a USB port (to share devices, such as printers and storage).

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Still, not all sets offer this capability, and this even doubles as a three port HDMI switch.

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This protrusion (which is removeable) provides access to a multi-function button, volume controls, power switch and micro-USB port for charging.

ENGADGET