Performance analysis and comparison of Local Area Networks (LANs)
In this study, analytical models were derived for the performance evaluation of Local Area Networks (LANs) using actual network specification. The performance parameters considered are: maximum achieveable node data rate, average message delay, average node buffer size, maximum number of nodes the network can support, and the network saturation message rate to a node. Performance models were developed for the CSMA-CD, token passing bus, token passing ring, and PBX types networks. The message service disciplines considered are: the packet service discipline (the transmission of the first packet in a user queue), and the byte service discipline (the transmission of all bytes accumulated in a user queue);To facilitate the use of the derived analytical models, a software tool was developed for the performance evaluation and comparison of LANs. Application of the software tool in generating performance and comparison results for Ethernet, Arcnet, Ringnet, and CBX are included. The evaluation results indicated that none of the selected LANs is always the best or the poorest in performance.