It forms a transmission line.
at the ends.
and the can-bus is a twister, pair, which has a characteristic impedance of 120 ohms
if the line is not terminated ,you get reflections. (noise)
there is also a split method.
the lines are balanced or they would never work this fast.
in fact they are called, balanced transmission lines, in electronics.
the DUE has no drivers, you must add the drivers. the current is very high, way more that a processor can muster.
if you read all posts, you see everyone, making up their own drivers.
http://www.ti.com/general/docs/datasheetdiagram.tsp?genericPartNumber=SN65HVD233&diagramId=SLLS557F
the driver can source 50 milliamp min. nothing trivial that.