英语翻译伴随着各种各样的应用需求和网络规模越来越大,网络管理工作也变得越来越繁重和维护越来越困难.出现了网络拥塞、网络安

Acompany with requirement of variety of application and expanding of network, the management of network has become more and more hard and difficult. A series of problems have been apeared such as network congestions, network safety, and network malfunctions.