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。
Port assignments on test servers vary, so if you get a connection error, select PackageTrackingServiceSoapBinding in the Web Services Explorer and you can add another endpoint.
测试服务器上的端口分配可以改变，所以，如果出现连接错误，请在Web ServiceS Explorer中选择Package TrackingServiceSoapBinding，您可以添加另一个端点。
If at least one element in the source port type is not duplicated, the drop happens and the error message Duplicates are not allowed is displayed.
如果源端口类型中至少有一个元素没有被复制，那么将抛出异常，并显示错误消息Duplicates are not allowed。
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