协议
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管理数据如何在电缆连接上格式化、传输和接收的规则集合。
协议定义了设备通过电缆交流的语言。USB、HDMI、DisplayPort和以太网都是具有特定信号传输、错误处理和设备协商规则的协议。像USB-C这样的单一电缆类型可以根据连接的设备承载多种不同协议。