由于竞争的加剧和灵活提供服务需求的增长 ,传统网络体系已不能适应未来网络的发展。于是,可编程网络和主动式网络概念出现了。其宗旨是为网络增添可编程功能 ,使之快速提供新业务 ,并进一步提高网络性能。最后本文还介绍了国外在这方面的研究工作 Due to the increased competition and the increasing demand for flexible service provision, the traditional network system has been unable to adapt to the future development of the network. The concept of programmable networks and active networks then emerged. Its mission is to add programmable functionality to the network to quickly deliver new services and further improve network performance. Finally, this article also introduces the foreign research work in this area