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A port serves as a communications endpoint in a computer. A port is associated with an IP address of the host, as well as the type of protocol used for communication.
Printers are of imnpact and non-impact type.
Dot Matrix Printer A printer that produces output by printing dots onto the page.
Non- Impact Printers
Ink jet Printer It uses nozzles which spray jets of ink onto the paper.
Laser Printer They use direct scanning of laser beam on the roller which fuses ink to the paper.