数据交换规则和要交换的数据结构。这些是必需的，以便能够在与不同计算机的网络中进行通信。传输协议定义了数据格式，传输，速度等的详细信息。
Rules for data exchange and the structure of data to be exchanged. These are required in order to enable communication in networks with different computers. The transmission protocol defines the details of the data format, transmission, speed, etc.
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