Kind of a vague question, but computer ports are needed so different devices (such as a mouse or keyboard) can communicate with your computer, and allow you to use it.
Basically you need VGA port to connect a monitor with laptop or now you can use HDMI port as well if your monitor has HDMI port too.
A 7 port USB hub is a device that plugs into a single USB port on the computer and offers 7 additional USB ports. This would be used in the event that a user had more USB devices to plug in than are available on the computer.
5 VDC the same as all devices that can be charge from your USB port on your computer..
some kind of port also called a i/o port for input/output on the computer
I don't think your computer has a PS2 port or that you PS2 has ports that do not have proper names Like USB Port or Ethernet Port
what is the computer term Loader Port
Yes.
Port 80, when speaking of computer terms, refers to the port that uses Hypertext Transfer Transport Protocol. This is a commonly used port for any computer that has internet access by any means.
how does computer send data through serial port?
A port is a generic term for a way in or out of a computer. A means of tranferring data into and out of the computer. A physical port is a socket on the computer, where you can connect a data cable. A virtual port is a program area, set aside and arranged so that the data can be handled by the processor, as it arrives or leaves the computer.
USB port
To connect a telephone to the telephone port of your computer, use a telephone jack.