![]() ![]() ![]() On a circuit with multiple devices physically connected, all devices will hear the transmission – so it is necessary to indicate for whom a transmission is intended which device should react to a transmission. A frame, illustrated above, is the unit of transmission. These functions are implemented with Ethernet Local Area Network (LAN) technology.Įthernet was a brand name for the original LAN product, and is now used to refer to a set of standards published by study group 802 of the Institute of Electrical and Electronic Engineers (IEEE), universally supported for communicating data between two devices over copper cables, fiber optics and over the air.ĭata is transmitted in blocks of about 1500 bytes, carried as the payload or information field of a frame. The result is the ability to transmit to another device on the same circuit. Layer 2, the Link Layer, provides mechanisms for indicating which device the communications are to and from on the circuit, which device is allowed to transmit next, controlling the flow of information to deal with limited capacities, and detecting bit errors. ![]()
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