主动网络是针对传统网络的不足而提出的一种新兴网络体系结构,它通过允许用户向网络节点嵌入定制的程序,从而可以快速动态地定制、配置新的服务,大大增强了网络的灵活性和可扩展性,因此具有广阔的应用前景。文中阐述了主动网络的产生背景和主动网络的基本体系结构、运行机制,并对主动网络的几种实例模型进行了分析和讨论。 An active network is a new network architecture proposed for the shortage of traditional networks. By allowing users to embed customized programs into network nodes, active networks can be quickly and dynamically customized and configured with new services, which greatly enhances the network flexibility and Scalability, so has a broad application prospects. In this paper, the background of active network and the basic architecture and operating mechanism of active network are expounded. Several example models of active network are analyzed and discussed.