Large amount of traffic data are transmitted during day-to-day operation of wide area networks. Due to the increment of diversity in network applications, its traffic features have substantially changed. Data complexity and its diversity have been rapidly expanding with the changing nature of network applications. In addition, bandwidth and speed of network have increased rapidly as compared to the past. Therefore, it is a necessity to characterize the changing network traffic data to understand network behavior. This paper is to understand the data nature and to find useful and interesting knowledge from the network traffic traces which contains IP protocol packets.