sublayer
Technical computing term for a layer within a larger layered structure, such as in network protocols or software architecture.
OSI参照モデルでは、データリンク層は二つの副層に分けられる。
In the OSI reference model, the data link layer is divided into two sublayers.
physical communication control sublayer
logical link control sublayer
Compound of 副 (sub-, auxiliary) and 層 (layer).