The RJ45 cable, also known as an Ethernet cable, is a standard cable which has four twisted pairs of colors. It is easy to crimp a RJ45 cable and make it into a straight cable or cross the cable as ...

I think that there's a way in linux to have a NIC act as though there is a crossover cable attached when it's really a straight cable, similar to how some hubs and switches have a port with a button ...