In my newly purchased router; I received a cable which is supposed to connect the modem and the router. Thanks. But my router is going to be placed in another room, about 20-cable-meters away, while the modem has to be placed in the other room (due to the only specific output being there).

Is there any difference between this (below) default cable and another normal but 20 meters longer internet-cable? 

![enter image description here](https://i.stack.imgur.com/DuIgf.jpg)