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Definition: automotive Ethernet

The use of Ethernet networking in a vehicle for its information and entertainment systems. Becoming the communications standard in vehicles, automotive Ethernet reduces cost and weight considerably over the traditional vehicle wiring harness that supports multiple transmission systems with a mass of cables (see MOST, CAN bus, FlexRay and LVDS). Starting in 2010, automotive Ethernet at 100 Mbps was used for diagnostics and firmware updates when the vehicle was being serviced.

IEEE 802.3bw and 802.3bp
Automotive Ethernet was derived from the IEEE 802.3 standard. IEEE 802.3bw and 802.3bp transmit at 100 and 1000 Mbps respectively using one twisted bi-directional pair of wires. See single pair Ethernet, 802.3bw and 802.3bp.