Analysis of Non-Gaussian Nature of Network Traffic
  To study mechanisms that cause the non-Gaussian nature of network traffic, we analyzed IP flow statistics. For greedy flows in particular, we investigated the hop counts between source and destination nodes, and classified applications by the port number. We found that the main flows contributing to the non-Gaussian nature of network traffic were HTTP flows with relatively small hop counts compared with the average hop counts of all flows. 
Tatsuya Mori, Ryoichi Kawahara, Shozo Naito