Abstract: A method of multicast data transmission from a web server to client terminal devices using a wireless local area network (WLAN) includes, before transmitting data from the web server, data preprocessing including data object type identification, forming of one or several logical channels in the overall bandwidth of a WLAN for each data object type, fragmentation of data objects into multiple data packets, and marking of each data packet with a header which contains at least transmission parameters. Data packets with headers are transmitted within the logical channels by data type, in a cyclic retranslation mode or by duplicating data packets and transmitting copies with delay.