29、使用send和receive命令的通信属于（）。A．管道通信系统B．直接消息传递系统C．间接消息传递系统D．客户-服务器系统
29、使用send和receive命令的通信属于（）。
A．管道通信系统
B．直接消息传递系统
C．间接消息传递系统
D．客户-服务器系统
参考答案和解析
直接消息传递系统
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填空题消息缓冲通信时，当发送者要发信息时，执行send系统调用命令，产生（）进入操作系统核心。