CAN, for Controller Area Network, is a serial bus used for communication between computers in the automotive, aerospace and telecomunication among others. Two message standards exist: the CAN 2.0A with a 11-bit addressing and CAN 2.0B with a 29-bit addressing. The recommended rates are 20Kbits/s to 1Mbits/s (depending on the capacitance and therefore also the distance: respectively 1,200 meters and 60 meters).