Which is the cable used in AFDX? Avionics Full-Duplex Switched Ethernet (AFDX) is an avionics network patented by Airbus, developed starting with A380 and new standard in all new generation aircraft from Airbus factories. 

I know that AFDX is Ethernet technology. But is it used the same Ethernet cable used to connect the computer to a LAN or to the Internet? Or is it used an improved version? Which are the differences between the two cables?
ARINC Specification 664 calls for quadrax cable or fiber optic cable.  Quadrax is a four conductor matched impedance (100 ohm) cable.  Connectors are MIL-DTL-38999.  


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The primary benefit is improved EMI protection and ruggedized connectors.

The B787 uses fiber optic.  A380 uses the quadrax cable.