网络是为应用程序服务的,其最终目的是提高企业工作效率和效益,但在多种因素的共同作用下,如服务器的集中管理、多媒体应用及需要高带宽的应用程序等等,经常会出现应用程序需要的带宽大于可用带宽的情况。在这种情况下,网络就如同一个漏斗,应用程序或者争抢带宽,或者在网络中全部受阻,而系统管理人员无法确保重要应用程序的顺利运行,他们必须尽全力来应付来自企业内各个不同部门对应用程序带宽的竞争性需求。 The ultimate goal of the network is to serve the application, but it is often the case that many factors, such as centralized management of the server, multimedia applications, and applications that require high bandwidth, are often present The bandwidth required by the application is greater than the available bandwidth. In this case, the network acts like a funnel, application, or contention for bandwidth, or it is all blocked in the network, and system administrators can not ensure the smooth running of critical applications. They must do everything in their power to cope with the differences The competing needs of the department for application bandwidth.