The second layer of OSI (Data-link layer) is divided into two sublayers by the Institute of Electrical and Electronic Engineers Inc (IEEE) project 802-MAC and LLC sublayers. |
| A MAC driver is the device driver located at the MAC sublayer. |
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| A MAC driver provides low-level access to network adapters by providing data transmission support and some basic adapter management functions. |
| These drivers also pass data from the physical layer to network protocols at the network and transport layers |