Achieving Quality of Service in Medium Scale Network Design Using Differentiated Services

Abstract

Quality of service (QoS) means packets are classified and sent to the destination based on the priority of the packet. Before the advent of this standard data packets were sent on a standard namely "Best effort". In this standard packets were sent on the policy of first come and fi rst serve basis without providing reliability, maximum throughput, and latency. This often results congestion on the router due to the load of Queue, packets were dropped due to congestion issues. The rise of multimedia application defines a need for a new standard which guarantees bandwidth with low delay and jitter. Multimedia applications like VoIP, Video conferencing are delay sensitive and cannot survive on the "Best effort" therefore we require some sort of differentiators that can detect these different types and appropriately prioritize and queue them for the effective transmission and this transmission is achieved with a new standard known as Quality of Service (QoS). Quality of Service is achievable by different types namely RSVP, RSVP-TE, MPLS and differentiated services. The main objective of this project is to explain how a medium scale network can be redesigned to implement quality of service within the network. Real-time simulations are obtained for multiple performance factors and implemented into a sample network to achieve the desired results.