NETWORK CABLE - FREEBOX

I am new to this field, what is the difference between the two:
Straight cable or crossover cable
Thank you

to directly connect 2 PCs, you normally need a crossover cable:
http://allowin.com/v1/cablage.htm
http://etienne.durup.free.fr/cablage/jecable2.htm

and ... Voila Voila!

but in the case of omacock, I don't think he needs to connect 2 PCs!
He just wants to connect his PC to his Freebox via Ethernet....
So he needs a straight cable
Physically, I don't know the difference...
If you still have the packaging, it's marked on it...
There must be another way, but I don't know it!
If you know someone who has a straight cable, test it with that! You'll be targeted right away!
Good luck!
I'm keeping my fingers crossed for you that it's just a cable problem!

In general, the sheath of the twisted cable is marked CROSSED.

Put the two plugs side by side and check if the colors are in the same order or not

Same order = straight cable
Different order = crossed cable

And for the Freebox, you need a straight cable.

too great!
thank you for the advice (even if I don't need it for now, it will definitely come in handy!)
have a great weekend everyone!!