Cable ends different - Is there a "good" and "bad" side?

The aim is to bring the cable with its properties as close as possible to the contacts of the plug to provide an optimal data transmission. The distinctive physical properties of a data network cable are firstly, that each pair is twisted and secondly, that the pairs are in a defined position to each other. The structure and symmetry properties characterize the impedance, ideally 100 ohm.

The cable design (whether shielded or unshielded) is illustrated by the following picture. What you see at each cable end is a pair at the top, at the bottom, on the left and on the right, like crosshairs. If you rotate both ends of the cable so that both sides of the same colour pair are located at the bottom (e. g. in the picture: blue and white) you will see that generally one pair is on the left hand side and one on the right hand side, thus mirror-inverted, on both cable ends (here: brown-white and orange-white).