Network Performance Evaluation with Real Time Application Ensuring Quality of Service with NS2

The quality of service is a need in recent computer network developments. The present paper evaluatessome characteristics in a proposed network topology such as dropped packets and bandwidth use, usingtwo traffic sources, firstly a VoIP source over an UDP agent, then a CBR traffic source over an UDP agentas well as the previous one. Two possible configurations are proposed, implementing both of them in theNetwork Simulator, and implementing in one of them differentiated services to compare the results.Statistics results are shown, in both cases showing the accumulative dropped packet number and thethroughput in the link, obtaining a reducer number of dropped packets in the stage with differentiatedservices, and an improvement in the bandwidth use.