When making twisted pair, why is the arrangement order of twisted pair different when the computer is connected to the central node and when the computer is connected to the computer?

When computers are connected to a central node, they are different from interconnected computers. One is to use direct connection, and the other is to use crossover. For the same equipment, the same equipment is used to connect the central node, but not the same equipment is used to connect the computer. However, not every computer is connected to each other through a direct connection. It depends on the equipment in the middle. The end result is that ordinary devices are directly connected and heterogeneous devices are crossed.