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In this paper two networks have been analyzed using OPNET IT Guru Academic Edition 9.1: one with a hub and the other with a switch and two hubs. The delay and collisions occur in both networks have been examined. The authors have observed the performance and effect of both networks in case of sending and receiving frames. If the frame size is constant 1500 bytes then the Traffic Received, Delay and Collision is high. But if they reduce the frame size from 1500 to 256 bytes, the performance is improved.
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