Problem description:

What are the common computer external interfaces? And explain their functions. Please give me a more exact answer, thank you.

Analysis:

PS/2 interface, serial interface, parallel interface, RJ-45 network interface, USB2.0 interface and audio interface. The high-end motherboard includes IEEE 1394 interface and wireless module.

PS/2 interface is used to connect PS/2 mouse and PS/2 keyboard, green interface is connected to mouse, and blue interface is connected to keyboard; The serial interface is used to connect an external modem and a recording pen. Parallel LPT interface is used to access old stylus and inkjet printers.

IEEE 1394 interface is mainly used to access digital cameras; The wireless module is used for establishing a wireless network; RJ-45 interface is used to access LAN or connect ADSL and other Internet devices. USB2.0 is used to connect high-speed USB devices such as MP3, cameras, printers, scanners, mobile hard disks and flash drives. The audio equipment interface is used to connect the active speakers of 7. 1 channel; Digital optical fiber interface is responsible for transmitting higher quality digital audio signals.