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What is the difference between a serial port and a parallel port?
Parallel ports are easy to program and faster compared to the serial ports. But main disadvantage is it needs more number of transmission lines. Because of this reason parallel ports are not used in long distance communications. Let us know the basic difference between working of parallel port and serial port. In serial ports, there will be two data lines: One transmission and one receive line. To send a data in 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 parallel port, all the 8 bits of a byte will be sent to the port at a time and a indication will be sent in another line. There will be some data lines, some control and some handshaking lines in parallel port. If three bytes of data 01000101 10011100 10110011 is to be sent to the port, parallel port communication is faster then serial port.
How can you link RS232 serial data on COM1 to output on COM2?
Yes on a modern computer you will need a USB to 9 pin RS232 converter or previously use the LPT parallel port.
What connectors are used on a parallel port cable?
Many devices have traditionally been connected to a parallel port. The most common usage was for printers. Image scanners, external hard drives, and Ethernet adapters have also been created for the parallel port.
If you need to use a legacy termional application that communicates through a COM or a serial port what IrDA spec is likely to be involved?
None. The IrDA is only important if you are using an infrared transceiver on the serial port. This is seldom found in most computers.
What is difference between a parallel bus and a serial bus?
A Parallel bus has a relatively large number of wires bundled together that enable data to be transferred in parallel. This increases the throughput, or rate of data transfer, between the peripheral and the computer. A Serial bus can be defined as a transmission path over which the participants transmit their data serially, sequentially in time, and using a common medium. In the case of serial transmission, only a single communication link for transferring data from any given end to another one. In the case of parallel transmission, we use multiple numbers of parallel links for the simultaneous transmission of all the data bits in the network.
