External port

The expansion interface is an interface on the main board for connecting various external devices. Through these expansion interfaces, you can connect external devices such as printers, external modems, scanners, flash drives, MP3 players, DC, DV, mobile hard disks, mobile phones, and tablets to your computer. Moreover, the interconnection between computers can also be realized through the expansion interface.

At present, common expansion interfaces include Serial Port, Parallel Port, Universal Serial Bus Interface (USB), and IEEE 1394 interface.