Characterizing traffic flow involves identifying sources and destinations of network traffic and analyzing the direction and symmetry of data traveling between sources and destinations. In some applications, the flow is bidirectional and symmetric. (Both ends of theflow send traffic at about the same rate.) In other applications, the flow is bidirectionaland asymmetric. (Clients send small queries and servers send large streams of data.) In abroadcast application, the flow is unidirectional and asymmetric. This section talks aboutcharacterizing the direction and symmetry of traffic flow on an existing network andanalyzing flow for new network applications.
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