Serial mouse to a serial port.
Display device (Monitor) to the VGA port.
Speakers to the audio out port.
Mic to the audio in/line in port.
Pen drive, Mouse, Printer, Keyboard, Sound cards, Memory cards, Cameras etc to the USB port.
Power cord to the SMPS port.
LAN cable to the Ethernet port. Dot matrix printer to the parallel port.
PCI cards
Is an expantion slot that is connected to your motherboard. To create new ports on your computer. (Example: I instuled new usb port on my computer.
Computer peripherals are connected to ports. For instance, a printer may be connected to a serial or parallel port. Modern keyboards and mice are commonly connected to the computer using the USB port.
A device which connects to the computer is called a "peripheral."
For communicating with peripheral devices.
For communicating with peripheral devices.
Peripheral ports such as COM, USB and serial ports, are input/output interfaces that allow devices to connect to a computer. Expansion slots are sockets on the motherboard where an expansion card is inserted.
On a typical setup, only one device can be connected to the ports. However, if you have a special USB port, or a device that will split a USB port, you can connect 2 or more devices.
On the telephone side, they are usually connected via a telephone cable to a wall telephone walljack. On the computer side they usually connected via a serial cable to the computer's serial port. Serial ports can have either 9 pin or 25 pin connectors, and so are often confused with parallel ports, which also can have 25 pin connectors.
The Mac Pro has two Ethernet ports so that two Ethernet cables can be connected to the computer. The cables may be connecting a local network or peripheral devices such as printers or cameras that require an Ethernet connection.
The USB ports in front of the case usually require to be connected and powered. Most often the are not connected but you can connect them by opening your case and looking for certain wires. You would best be off taking it to a repair centre.
By using peripheral devices and the various input ports and sockets.