The way multicast works on a non-bridged LAN is a sender does a UDP send to a specific, reserved address from the ANA defined area. the one packet goes via wifi router and any switches to all on the lan. If anyone joins a group matching the address they all will get the same packet at the same time. The group allows the cyw3 interface to filter and ignore undesired out of group packets.Does it generate a broadcast over WiFi, or it duplicates the packets as unicast?
Wifi protocol handles and detects some transmission errors and will re-transmit in some cases. But it is UDP so there is no point to point acks. Ethernet is less robust and does not handle collision type errors and does not retry,
Statistics: Posted by nospamcalfee — Tue May 13, 2025 10:35 pm