@TP-Link So I had a minute and I mocked up a diagram of the set-up:

@TP-Link Yeah, you've understood it correctly. Every device is connected to one of the M4 units via Cat6 or better ethernet cabling. My understanding is because the M4s are AC1200 the max download...

Basically I have a server (a RPi4, which is gigabit) that's connected to the M4 unit downstairs and if a computer is wired to the same M4 unit when I do an iperf test the speed is 1gbps, which is...