Cut-through switches do not perform any error checking of the frame because the switch looks only for the frame's destination MAC address and forwards the frame out the appropriate switch port.
直通式交换机不执行任何帧错误检查，它只查找帧的目的MAC地址，并从相应的交换机端口将帧转发。
The left-right rotating institutions: replacement stowage direction convenient adjustment, only adjustment screws can, do not need to change the trachea and magnetic reed switch.
左右旋转机构：更换置物方向时方便调整，仅调整螺丝即可，不需要换气管及磁簧开关。
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