TABLE OF CONTENTS A port contains a set of signal lines that the CPU uses to send or receive data with other components. Ports are usually used to communicate via modem, printer, keyboard, mouse, etc. In signaling, open signals are 1 and closed signals are 0. A parallel port sends 8 bits and receives 5 bits at a time. The serial port RS-232 sends only 1 bit at a time. However, it is multidirectional. So it can send 1 bit and receive 1 bit at a time. Parallel ports are mainly meant for connecting the printer to the PC. But this port can be programmed for many more applications beyond that.
Parallel ports are easy to program and faster compared to the serial ports. But the main disadvantage is that it needs more number of transmission lines. Because of this reason parallel ports are not used in long-distance communications. You should know the basic difference between working off a parallel port and serial port. In serial ports, there will be two data lines: one transmission and one receiving line. To send data in a serial port, it has to be sent one bit after another with some extra bits like start bit, stop bit, and parity bit to detect errors. But in a parallel port, all the 8 bits of a byte will be sent to the port at a time and an indication will be sent in another line. There will be...
