In the present era, a well-regulated web server comes with all new solutions to all new bulky heap of requests of daily users. As there is a rapid change in technology, the average number of requests on the web server is increasing rapidly. Moreover, WSNs (Wireless Sensor Networks) has proved to be a revolutionary technology for monitoring the physical and environmental state of a machine. This manuscript targets to evaluate the performance of a web server based upon modern-day protocol IEEE 802.15.4 for WSNs using different scenarios (with GTS (Guaranteed Time Slot), Mixed GTS, & Without GTS). Depending upon the evaluation performed, it can be concluded that the performance of the webserver can be enhanced by trading-off in the use of the GTS mechanism in IEEE 802.15.4 for WSNs.