Abstract: “In this paper we simulate a campus LAN using IT Guru Opnet 9.1 and then we calculate the performance of this network under 10BaseT and 100BaseT Ethernet wiring standards with varying time and components (i.e. no. of hubs) and finally we compare the results i.e. which standard perform better for which time duration and for how many number of components. We find that numbers of collision counts at hubs are always more in 10BaseT, because of the nature of this standard. Hubs are always more utilized in 10BaseT, because of more retransmission attempts due to high number of collisions in 10BaseT. Hubs filter no traffic for 10BaseT but for 100BaseT they filter some traffic and perform well with increasing time. When we increase the time not the components the performance of switch is good under 100BaseT because it filter more traffic with increasing time as compare to 10BaseT. When we increase number of components and time period in 100BaseT, it also performs well. In this case when time is”

Keywords: Collision count; Utilization; Traffic Received, Traffic Forwarded, 10BaseT, 100BaseT