Abstract
Data reliability, network performance and quality of service are the core issues discussed and work out in the recent few decades. Both reliability and network performance have been affected by different network resources and mechanisms used to forward data from senders to receivers. For instance, when data from a sender Si is aimed to pass through Network N to receiver R1 the network devices in between them queue this data by some specific mechanism known as queuing mechanism. Now depending on the queuing mechanism the data wait for further processing and transmission to reach its destination. In this paper, we have examined and analyzed different network queuing mechanisms in Voice application out of our obtained results. Different queuing mechanisms in different nature of data (text and voice) have been simulated using OPNET IT Guru Academic edition. Empirical results show the impact of a particular queuing mechanism on the network performance, data reliability and many other QoS parameters such as delay, jitter and packet loss.