noun
physical layer
Computing term for the lowest layer of the OSI model, dealing with transmission of raw bits over a physical medium.
物理レイヤは、実際の通信媒体を扱う層です。
The physical layer is the layer that handles the actual communication medium.
Compound of 物理 (physics) and レイヤ (layer), a direct translation of the English computing term 'physical layer'.