3White Paper NetFlow Services and Applications: http://www.cisco.com/warp/public/cc/pd/iosw/ioft/neflct/tech/napps_wp.htm.
4R. C aeeres, N.G. Duffield, A. Feldmann, J. Friedmann,A. Greenberg,R. Greer, T, Johnson, C. Kalmanek, B. Krishnamurthy, D. Lavelle,P.P. Mishra, K.K. Ramakrishnan,J. Rexford, F. True, J.E. van der Merwe,' Measurement and Analysis of IP Network Usage and Behavior.
5Ka Hung HUI and OnChing YUE , Mobile Technologies Centre (MobiTeC), The Chinese University of Hong Kong , ‘Analysis of a Distributed Denial-of-Service Attack’.