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Monitoring network traffic and classifying applications are essential functions for network administrators. In this paper, the authors consider the use of Traffic Dispersion Graphs (TDGs) to classify network traffic. Given a set of flows, a TDG is a graph with an edge between any two IP addresses that communicate; thus TDGs capture network-wide interactions. Using TDGs, they develop an application classification framework dubbed Graption (Graph-based classification). The framework provides a systematic way to harness the power of network-wide behavior, flow-level characteristics, and data mining techniques.
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