What's 802.11bn?

[Questions]

I know that 802.11n is over 100 Mbps.

But my ap is connected to 802.11bn, and the actual speed is 20Mbps.

Is this normal? I'm using cap-1702i.

[Leo Laohoo]

Maybe because the wireless client only has 2.4 Ghz?

[Questions]

I have to use an of 2.4 ghz. Is 20 Mbps normal? Or can we speed up by changing the settings?

[Leo Laohoo]

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@Questions wrote:
I have to use an of 2.4 ghz. Is 20 Mbps normal? Or can we speed up by changing the settings?

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It depends on the wireless NIC of the wireless client(s). 

Exactly what kind of device is this?