In the seven-layer OSI model of computer networking, media access control (MAC) data communication protocol is a sublayer of the data link layer, which itself is layer 2. The MAC sublayer provides addressing and channel access control mechanisms that make it possible for several terminals or network nodes to communicate within a multiple access network that incorporates a shared medium, e.g. Ethernet. The hardware that implements the MAC is referred to as a medium access controller.
The MAC sublayer acts as an interface between the logical link control (LLC) sublayer and the network's physical layer. The MAC layer emulates a full-duplex logical communication channel in a multi-point network. This channel may provide unicast, multicast or broadcast communication service.
| Multiplex techniques |
|---|
| Circuit mode |
| TDM · FDM/WDM · SDM Polarization multiplexing Spatial multiplexing (MIMO) OAM multiplexing |
| Statistical multiplexing |
| Packet mode · Dynamic TDM FHSS · DSSS OFDMA · SC-FDM · MC-SS |
| Related topics |
| Channel access methods Media Access Control (MAC) |
Read more about Media Access Control: Functions Performed in The MAC Sublayer, Addressing Mechanism, Channel Access Control Mechanism, Common Multiple Access Protocols Famous quotes containing the words media, access and/or control:“The media network has its idols, but its principal idol is its own style which generates an aura of winning and leaves the rest in darkness. It recognises neither pity nor pitilessness.” “Oh, the holiness of always being the injured party. The historically oppressed can find not only sanctity but safety in the state of victimization. When access to a better life has been denied often enough, and successfully enough, one can use the rejection as an excuse to cease all efforts. After all, one reckons, “they” don’t want me, “they” accept their own mediocrity and refuse my best, “they” don’t deserve me.” “I have not ceased being fearful, but I have ceased to let fear control me. I have accepted fear as a part of life, specifically the fear of change, the fear of the unknown, and I have gone ahead despite the pounding in the heart that says: turn back, turn back, you’ll die if you venture too far.” |