Hi Vinay,
well, i am not an expert in this question either.
But it is for sure that the SAP Webdispatcher handles the HTTP communication and also in the same time it is dealing with load balancing too (and also doing some other tasks as well):
Server Selection and Load Balancing Using the SAP Web Dispatcher
https://help.sap.com/saphelp_nw70/helpdata/en/5f/7a343cd46acc68e10000000a114084/frameset.htm
Best Regards,
Viktor
