另一个经常讨论的主题是，服务是同步的还是异步的，与编程模型相比，使用的通信协议充当什么角色。
Another subject of frequent debate is whether a service is synchronous or asynchronous, and what role the used communication protocol plays compared to the programming model.
完成了基于RS- 232c标准异步串行通信协议的设计，实现了系统回波数据与PC机之间的数据交换。
An asynchronous serial communication protocol based on RS-232C is designed to realize the data communication between the PC and the system.
数字通信中，常用的通信协议有同步协议和异步协议。
Synchronous protocol and asynchronous protocol are in common use in digital communication.
数字通信中，常用的通信协议有同步协议和异步协议。
Synchronous protocol and asynchronous protocol are in common use in digital communication.
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