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中国公用分组交换数据网分组交换方式是60年代中期随着计算机联网应用的发展而发展起来的。由于分组交换具有传输质量优良、电路利用率高、网络安全可靠、应用范围广泛等特点,特别适合计算机之间的通信。80年代中期,绝大多数国家在兴建计算机网络时都采用了分组交换技术。中国公用分组交换数据网已成为建立多用途、低价格和高效率网络的基础,在我国国民经济各部门、政府机构、企事业单位得到广泛应用。一、怎样认识分组交换?分组交换也称包交换。分组交换机将用户要传送的数据按一定长度分割成若干个数据段,这些数据段就叫做“分
China’s public packet-switched data network packet switching is the mid-60s with the development of computer networking applications developed. Because packet switching has the characteristics of excellent transmission quality, high circuit utilization, safe and reliable network, wide range of applications, etc., especially suitable for communication between computers. In the mid-1980s, the vast majority of countries in the construction of computer networks have adopted the packet switching technology. China’s public packet-switched data network has become the basis for establishing a multi-purpose, low-cost and high-efficiency network. It has been widely used in all sectors of our national economy, government agencies, enterprises and institutions. First, how to recognize packet switching? Packet switching, also known as packet switching. The packet switch divides the data to be transmitted by the user into several data segments according to a certain length. These data segments are called ”