This question is too vague to give a specific answer to. Do you mean the old COM port of a PC? If so, this is an RS232 type port which is "point to point" - in other words you can only connect one device to it. There are many other serial interfacing technologies, some of which support many devices attached to one port - e.g. RS485 which is a multidrop bus and can have many devices connected to one pair of wires. Modern interfaces like USB are also serial in nature. USB can support up to 127 devices on a multilevel connection structure, but you can still only connect one pair of devices on a single wire. To attach more devices use a USB hub (or lots of them). Standard USB hubs spread one connection to either 4 or seven downstream ports.
usb port driver, serial adapter,
The serial port is mostly used to connect Modems. However, there are many devices that can connect to the serial port. Some of these are, mouses, trackballs, scanners, Ham radio equipment, cash registers and many many more.
no
USB port (Unassigned Serial Port)
serial port to communicate between CPU with other devices such as printer
One. SATA interfaces are USUALLY only one device at a time. It is possible, if the controller supports it, to use a port multiplier which allows you to use four devices off one port .
COM
A serial port can be connected to numerous devices; pretty much any device that has another serial port. Examples include: Modems, serial mice, serial printers, bar code readers, digital scales, data acquisition equipment, pumps, flow monitors, radios, etc. I have a ham radio receiver that is controlled completely through a serial port and custom software; and I am writing a custom piece of software right now that connects through the serial port to a digital scale for process automation.
Both an iOS or Android device supports a USB port, but only Android devices have a slot for a microSD card.
Most serial adapters can be found on computers and they connect the monitor/screen to the actual computer itself. A serial adapter may also be used to connect your television to your laptop. In this case, you would connect the usb part to your television port where it is marked USB and the serial adapter part to your computer.
data link port
To send and receive data between computers or other electronic devices.