Data mining is important process to extract the useful information and pattern from huge amount of data. NS-2 is an efficient tool to build the environment of network. The results from simulate these environment in NS-2 is trace file that contains several columns and lines represent the network events. This trace file can be used to analyse the network according to performance metrics but it has redundant columns and rows. So, this paper is to perform the data mining in order to find only the

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... cessary information in analysis operation to reduce the execution time and the storage size of the trace file. KEYWORDS Data mining, NS-2, old trace file, new trace file.