In the new era, the ZigBee devices are rapidly used in the various fields, such as Internet of Things, Wireless Sensor Networks & in many more, because of their attractive advantages like simplicity, smaller size, lower data transfer rate, secure networking, powerful antenna coverage, Open Global Standard for wireless techniques, built for low power i.e. economical to deploy & digital-radio signals for PAN. It runs on IEEE 802.15.4 Standard i.e. applied in the number of applications such as automatic climate control in homes, industries & medical services. In this paper, we evaluate the performance results of star & cluster-tree topology, using the metrics of throughput, delay & ratio of packets transmitted with packets collided. By comparing both topologies, we explore that the cluster-tree topology has higher throughput & higher number of packets transmitted in advantage from star topology, but the star topology has lesser number of packets collided & short delay in advantage from cluster-tree topology. The problems that have occurred during the path are also evaluated using the ratio of Packets Transmitted with Packets Collided, thus the distraction in the path will be calculated.

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