usb

https://habr.com/ru/companies/ruvds/articles/1048666/ https://electronics.stackexchange.com/questions/236983/how-does-a-usb-hub-work https://en.wikipedia.org/wiki/USB_hub

https://www.circuitbread.com/tutorials/how-usb-works-introduction-part-1

USB Interview Questions https://embeddedinterviewlab.com/questions/topic/usb/