Data transmission is a process of transferring data between two or more digital devices Data is transmitted from one device to another in digital or analog format.Serial transmission:Transferring one bit at a time, therefore, it needs only one wireIt reduces costs for the wire but also slows the speed of transmission Parallel transmission:Multiple bits are sent on different channels (wires) simultaneously within the same cableData can be sent much faster Isochronous transmission:The Isochronous Transmission Format is also known as START-STOP mode or CHARACTER mode. Each character or byte is framed as a separate and independent unit of DATA that may be transmitted and received at irregular and independent time intervals. The characters or bytes may also be transmitted as a continuous stream or series of characters. ? The fastest among all is parallel data transmission.