A comparative analysis of different real time applications over various queuing techniques

QoS (Quality of Service) is a very intricate and widespread system which belongs to the area of priority congestions management. It is implemented by using different queuing mechanisms, which take care of arranging traffic into waiting queues. Time-sensitive traffic should have maximum possible priority provided. However, if an appropriate queuing mechanism (FIFO, CQ, WFQ, etc.) is not used, the priority loses its preliminary denotation. It is also a well-known fact that all elements with memory capability involve additional delays during data transfer from one network segment to another, so a proper queuing mechanism and a proper buffer length should be used, or the VoIP quality will deteriorate. In this paper, a comparative study has been done among real time applications such as Web Server, VoIP, E-mail, FTP and Voice Server under the same topology. The network topology remained the same in all scenarios; the differences are only in the used queuing disciplines.