\"用户数据报协议\"(User Datagram Protocol,简称UDP)是基于无连接的通信协议，不保证可靠数据的传输；\"传输控制协议\"（Transmission Cotrol Protocol，简称TCP）是基于连接的通信协议，可提供个两台计算机之间可靠无差错的数据传输。但是UDP能够向若干台目标计算机发送数据；接收发自若干个源计算机的数据。而在多台计算机构成的仿真或控制系统中，经常会出现多台计算机进行数据传输，所以在仿真或控制软件中采用UDP协议的较多。-"User Datagram Protocol" (User Datagram Protocol, or UDP) is not connected to the communication protocol, it does not guarantee reliable data transmission; "Transmission Control Protocol" (Transmission Judiciary Protocol, or TCP) is based on the communication protocol connectivity, can provide 000 two terms Machine between reliable, error-free data transmission. But UDP to be able to target a number of Taiwan's computer to send data; Received from a number of sources of computer data. In several computers or control the simulation system, there are always multiple computers for data transmission, or control the simulation software used UDP more.