Media Access Control

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

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