You are troubleshooting a problem with a new 802.11ax AP. While the AP supports four spatial streams, most clients are only achieving maximum data rates of 150 Mbps. What is the likely cause?
You are troubleshooting a problem with a new 802.11ax AP. While the AP supports four spatial streams, most clients are only achieving maximum data rates of 150 Mbps. What is the likely cause?
The likely cause for most clients only achieving maximum data rates of 150 Mbps, despite the AP supporting four spatial streams, is that the clients are only two stream 802.11ax clients. Many current client devices are still equipped with only two transmit and receive antennas, limiting their ability to utilize all the spatial streams supported by the access point.
Believe this should be A. "...most client devices today are STILL only 2×2 MIMO" https://www.duckware.com/tech/wifi-in-the-us.html
The answer is 'A'. In the CWNA-108 pg 132 The receiving device must have an equal number of radio chains to the transmitting device. For example, if the AP has four transmitting (Tx) and receiving (Rx) antennas, the client must also have four.