Computers are already very common, and most families have one or two computers, and computers in student dormitories in universities are even more common. Generally, each dormitory has two, or even three or four computers. It is a waste of resources to use multiple computers individually instead of connecting them into a network (local area network). The easy way to connect two computers: direct cable connection.

　　"Cable" is actually the parallel port line, the parallel port is the printer port, and the parallel port line is of course the printer line. Just use the parallel port to connect the two computers. One limitation of connecting two computers with a parallel port cable is that the two computers cannot be too far apart. A parallel port line of two or three meters is enough; and if the computer in the family is placed in two rooms, then we must find a way.

　　Need to reset. As usual, click to run "Start" → "Programs" → "Accessories" → "Communication" → "Direct Cable Connection" on the host or client computer, click the "Change" button, and the "Direct Cable Connection" wizard will pop up, and then refer to the previous The setup process redefines the host-guest relationship

　　In fact, this is not a "network" in the strict sense, but because there is no need to purchase new equipment, it can achieve the maximum benefit with the least amount of money, and it is the most economical and convenient method for dual-machine interconnection. However, this method is not without its shortcomings. The specific performance is that the host-guest relationship needs to be reset frequently when the two machines exchange visits. In addition, the data transmission rate is relatively slow, which is only suitable for dual-machine data exchange or simple online games.