It's called a COM port.
A com port can also be called a serial port.
Normally called the serial port, but could also be called UART or RS-232
In the past external modems connected to the COM (or serial) port. However, most modern external hardware is USB these days, modems are no exception.
COM
No. VGA port is not either serial or parallel port. It is a different interface. If you need a serial output, you need a VGA to serial converter.
FastEthernet Port Serial Port
No. Its a parallel port
I/O controller
universal serial bus port
It refers to the 25-pin or 9-pin male serial port on the back of a PC. "A serial port conforms to the interface standard called RS-232c (Reference Standard 232 revision c), which is why a serial port is sometimes called the RS-232 port. The maximum cable length for a serial cable according to RS-232 standards is 50 feet. This interface standard originally called for 25 pins, but because microcomputers use only nine of those pins, manufacturers often installed a modified 9-pin port." -CompTIA A+ Guide to Managing & Maintaining You PC Sixth Edition
You cannot simply "redirect" communication intended for a legacy serial port to a a USB port. You must purchase an adapter that emulates a legacy serial port.
USB port, serial port, parallel port.