pData communication standards are comprised of two components The protocol and Signaldataport specifications for the devices involved. The protocol describes the format of the message and the meaning of each part of the message. To connect any device to the bus, an external device must be used as an interface which will put the message in a form which fulfills all the electrical specifications of the port. These specifications are called the Standard. The most famous such serial communication standard is the RS-232.ppIn IT technology, Communication can be serial or parallel. Serial communication is used for transmitting data over long distances. It is much cheaper to run the single core cable needed for serial communication over a long distance than the multicore cables that would be needed for parallel communication. It is the same in wireless communication Serial communication needs one channel while parallel needs multichannel. Serial Communication can also be classified in many oth