At the same time, NP needs to classify the coming packet and satisfy some new complex network applications, such as filtering the packet, differentiated qualities of service, QoS, Multicast and so on.
另外一些新的网络应用如数据包过滤、区分服务、服务质量、多播、流量计费等，都需要NP对到达的数据包进行分类。
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