串口是常用的计算机与外部串行设备之间的数据传输通道。
CommPort is the data transmission channel between PC and the outside serial equipment.
广泛使用的局域以太网，使数据传输通道带宽得到了充分保障。
Local Ethernet is used widely so that the data transmission channel bandwidth is ensured.
结果导致有些层没有实现架构价值，而仅仅起到数据传输通道的作用。
The result of this is that some layers add no architectural value and merely act as a pass-through for data.
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