One phrase, one visual climb, one quiz — so the device-to-layer mapping sticks.
Say it a few times. Each word's first letter is a device, in order from the bottom of the OSI model to the top.
Devices sit at the layer they belong to — lowest (Physical) at the bottom. Click any card to flip it and check the function + hook.
You'll see a device. Pick its layer before you second-guess yourself.