Naji Mohammad received his B.Sc. from Tishreen university at 1995 and his M.Sc. from Tishreen university at 2004 Currently he is a PhD student at University of Tishreen in the networking Laboratory under the supervision of Abbass Hassan and Radwan Heitham His research interests "Congestion analysis and Resource management for multimedia traffic at IP networks". Abbass Hassan is Associate professor, Department of Communication Engineering, Faculty of Information and communication technology Engineering, Tishreen University, Tartous, Syria Radwan Heitham is Associate professor, Department of Communication Engineering, Faculty of Mechanical and Electrical Engineering, Tishreen University, Lattakia, Syria.