International Journal of Engineering and Innovative Technology (IJEIT)
In this paper, the authors review the basic of quality of service. The key idea is to decouple congestion measure from performance measures such as loss, queue length or delay. The resources that network needs to manage are buffer and bandwidth. Specifically, paper starts by introducing the services in QoS, buffer management scheme and scheduling. Scheduling mainly used to distinguish between the packets that selected by the scheduler for further processing. Its main goal is to improve the QoS. Buffer management used to control traffic fairly and efficiently. Also, includes two QoS framework. Integrated services (intserv) and differentiated services (diffserv).