CSMA/CD (ie Collision Detection) is based on the node sensing for a collision immediately after TX. It works wonders for wired networks.

CSMA/CA (ie Collision Avoidance) is purposed for wireless by adding a sub-layer to the data link OSI layer and variations on the protocol uses concepts like control channels, CTS and RTS, various randomized counters (CIFS, DIFFS, Contention Window) that reduces the chances of collisions significantly while addressing the TX RX only limitation.

https://www.quora.com/Why-does-wireless ... of-CSMA-CD

That is why there is a disable CSMA/CA option for NStream....