and Ashish Kumar

Abstract. Paper describes a Centralized Network File Server supporting multiple clients at a time and responding their queries of multiple formats files like txt, docx, pdf, htm, jpeg, mp3, mp4 and flv etc. The server is implemented in three scenarios, first using simple TCP protocol in java socket, where client request is directly send to server and processed, while in second and third scenario server unicast and multicast list of files present at the server to each client. In unicasting the client will receive a single copy of file list, when it makes connection with the server. While in multicasting, each client whom is a member of multicasting group will receive a copy of file list each time a new client makes connection with the server or after a period of time. The client request is first verified and validated against server file list, at its end and then sends to server. The system is analyzed and compared on the basis of Heap memory usage and bandwidth utilization for server processing and data communication, when connected with 2, 4 and 8 number of clients