The asynchronous Transfer Mode (ATM) is the widely used packet switching and connection oriented technology that meets diverse services and performance requirements of real time applications using the broadcast . An ATM network is suitable for multimedia services with different traffic flow characteristics and quality of services (QoS ) requirements. In order to meet the required QoS of each traffic type, some types of priority disciplines are needed in packet switching to increase the utilization of switches in ATM networks. This paper describes a buffer management scheme using two different prioritized service disciplines in order to improve the QoS in terms of cell delay time for each traffic class and to reduce the cell loss rate of loss sensitive class in an ATM network. The performance analysis and comparative study of these priority schemes have been presented.

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This paper presents an information technology infrastructure enabled by grid computing as a solution to todays changing business needs. The paper introduces the concepts of grid computing by highlighting its evolution, business and technological benefits. Since the Information Technology has taken the center stage in the operation of business appropriate investment is essentially required. The paper provides a survey of various organizations that have successfully employed grid computing as a tool. The study has revealed that participating organization haves been able to reduce costs by moving to an enterprise grid computing environment.