Here you can find more information about broadband cable/standards used in cars:

Automotive Pixel Link:

APIX is a serial high speed Gigabit Multichannel link to interconnect displays, cameras and control units over one single cable targeting automotive applications. APIX2 transmits up to two independent HR real time video channels plus bidirectional protected data communication like Ethernet, SPI, I2C including 8 channels for audio.

(Source: Wikipedia)

IEEE 802.3:

IEEE 802.3 is a working group and a collection of Institute of Electrical and Electronics Engineers (IEEE) standards produced by the working group defining the physical layer and data link layer's media access control (MAC) of wired Ethernet. This is generally a local area network (LAN) technology with some wide area network (WAN) applications. Physical connections are made between nodes and/or infrastructure devices (hubs, switches, routers) by various types of copper or fiber cable.

(Source: Wikipedia)

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