As we all know that the binary data, consisting of 1s and 0s, may be organized into groups of n bits each. The computers always produce and consume the data in groups of bits much as we conceive of and use spoken language in the form of words rather than the letters. So, by grouping, we can simply send data n bits at a time instead of 1. This is called the parallel transmission.
The mechanism for parallel transmission is conceptually very simple. Use n wires to send n bits at one time. In that way each bit has its own wire and all the n bits of one group can be transmitted with each clock tick from one device to another device. The big advantage of parallel transmission is the factor of speed. All else being equal, parallel transmission can increase the transfer speed by a factor of n over a serial transmission. But there is also a very significant disadvantage of parallel transmission. And that is the factor of cost. It can be proved from the fact that the parallel transmission requires 'n' communication lines for example wires, just to transmit data stream. Because this is very expensive, parallel transmission is usually limited to short distances.
The mechanism for parallel transmission is conceptually very simple. Use n wires to send n bits at one time. In that way each bit has its own wire and all the n bits of one group can be transmitted with each clock tick from one device to another device. The big advantage of parallel transmission is the factor of speed. All else being equal, parallel transmission can increase the transfer speed by a factor of n over a serial transmission. But there is also a very significant disadvantage of parallel transmission. And that is the factor of cost. It can be proved from the fact that the parallel transmission requires 'n' communication lines for example wires, just to transmit data stream. Because this is very expensive, parallel transmission is usually limited to short distances.