介质访问控制 jièzhìfǎngwènkòngzhì medium access control Origin Definitions Defs Strokes Stroke Words Sentences Sents 介质访问控制层 jièzhìfǎngwènkòngzhìcéng MAC layer The Media Access Control layer of a network; a sublayer of the data link layer responsible for controlling how devices on a network gain access to a medium and permission to transmit data.