Originally Posted by sailingdog
Only for TCP connections, not UDP ones.
true, but the transmitting radio will retransmit frames that don't get ack'd by the receiving side regardless of what transport protocol is being used (it happens at layer 2, TCP/UDP packets start at layer 3). The number of retransmits varies based on the vendor, but a typical value is 4 retransmits before the frame is dropped.
this means that even UDP packets that are dropped on the wifi link will be retransmitted (at least a few times), just with a little delay.