用户总喜欢将未被使用的带宽迅速填满,这似乎已是一项不成文的联网规律。而随之产生的网络拥挤却在企业中制造混乱,阻碍高优先权信息流的通过,使用户倍感沮丧,并使网络设备瘫痪。似平上述后果还不够严重,当今的多服务网络能处理报文传送、交易、视频、电话以及其它更多服务,从而使带宽分配和网络控制更加困难。充足的带宽并不足以解决网络拥挤问题,因为应用程序各有不同的网络需求。数 Users always like to fill unused bandwidth rapidly, which seems to be an unwritten networking rule. The resulting network congestion creates confusion in the enterprise and blocks the passage of high-priority traffic, frustrating users and paralyzing networked devices. While the above consequences are not serious enough, today’s multi-service networks can handle packet delivery, transactions, video, telephony, and more, making bandwidth allocation and network control more difficult. Adequate bandwidth is not enough to solve the problem of network congestion, because applications have different network needs. number