While validating vendor multi-user features on a council-chamber WLAN, which frames indicate sounding for MU-MIMO or transmit beamforming?
Select an answer to reveal the explanation.
Short Explanation
Beamforming and MU-MIMO need a quick channel 'sonar ping' before the big multi-user send—that’s the NDP sounding sequence. Spot those announcement/NDP frames in the chamber capture and you know the multi-user feature path is actually awake.
Full Explanation
Transmit beamforming and MU-MIMO rely on channel sounding sequences that include NDP announcement and Null Data Packet exchanges. Their presence in captures supports validation that vendor multi-user features are operating. Absence of sounding when MU features are claimed suggests configuration or client capability gaps.