1.USB port: used to connect various peripherals, such as mouse, keyboard, printer, digital camera, etc.

2.HDMI port: used to connect video output devices such as HDTV and monitor.

3.VGA port: used to connect video output devices such as old monitors and projectors.

4. Audio port: used to connect audio output devices such as headphones and speakers.

5. Network port: used to connect Ethernet cable to realize network connection.

6. Power interface: used to connect the power adapter and supply power to the computer.

7. Card reader: used to read various memory cards, such as SD card and CF card.

The specific purposes of these ports are as follows:

1.USB port: used to connect various peripherals, which is convenient for data transmission and device control.

2.HDMI port: used for high-definition video output and supporting audio and video transmission.

3.VGA port: It is used for video output, but only supports video transmission, and requires an additional audio cable.

4. Audio port: used to connect audio output devices such as headphones and speakers, supporting audio transmission.

5. Network port: used to connect Ethernet cable to realize network connection and facilitate Internet access and data transmission.

6. Power interface: used to connect the power adapter to provide power for the computer and ensure the normal work of the computer.

7. Card reader: used to read the data in the memory card, which is convenient for data transmission and backup.

In a word, these ports are designed to facilitate data transmission, device connection, video output, audio output, network connection and so on. Different ports have different functions and can meet the different needs of users.