My environment is:

(1) a home version of TPLINK router

(2) two laptop

(3) both laptops WIN10 system installation,



I now want to use Java language to achieve A LAN multicast multicast function, when A and B laptop connected to the router, in the form of wireless Java program in A and B laptop is unable to realize the function of the multicast communications,

But when A and B notebook to use Ethernet cable connected to the router, A and B of the laptop is A Java program can realize the function of the multicast communication, the conclusion is obvious, with cable can send multicast and receive multicast, I would like to ask the question is, what is the underlying reason I this kind of situation? Thank you!