Basic networking question

[DeanoVIP]

Is there a way to check if this BSS behaviour is enabled my Router is a Fritzbox 7530 and the repeater is a Fritz! Repeater 3000. I should elaborate the reasoning for my post, my downstairs TV tends to buffer more on HEVC content my CPU is only a i5 6500 so I am considering to get a i5 7500T for better QSV support. Now I'm stuck with wireless but I could in theory wire in my downstairs ROKU box. I also have the issue where my Server decides at random it will go to 2.4ghz instead of 5ghz and that causes havoc streaming, to counter this I'm proposing to buy a better wifi card for the machine, probably a PCI one rather than a USB power one.