Data transfer is also known as data transmission, digital transmission and digital communication. You can physically transfer the data using the data transmission or data transfer. The channel which is used for the data transfer is known as point to point or point to multi point communication. The channels can be optical fibers, copper wires, wireless communication channels and the storage media. The data which is sent through the data transfer is sown in the form of electromagnetic signals for example the electric voltage, microwave, radio wave or the infrared signals. There is a term used analog transmission in which the continuous varied analog signal is being sent. Transfer of discrete messages is known as digital communication. There are two types of transmissions; Base band transmission and the pass band transmission. Base band transmission is the transmission of data by a sequence of the pulses. The pass band transmission is the transmission of data by a limited set of varying waveforms continuously. Digital transmissions are represented as both pass band and the base band transmission. Base band signal is represented as the digital signal and the pass band is represented in the form of digital to analog conversion. You can either create a message through a data source known as a computer or a keyboard. There can also be the analog signal like the phone call or the video signal. Code equipment is being used for the source coding and the decoding.
In the field of data transfer as well as the digital transmission, courses and the text books have the similar content. Data transfer belongs to the telecommunication and the electrical engineering. You can also say that the basic principles of data transfer can be covered in the topic of data communication of the field computer science. There are also computer network and the computer communication applications. The network protocols include process to process communication and the switching. There is a term used called tele transmission which involves the digital transmission as well as the analog communication. There are some of the textbooks and the courses for the data transfer which lie in the OSI model protocol layers. These are the physical layer which includes the multiplexing and bit synchronization etc, the data link layer which includes the flow control and the error detection etc and the presentation layer which includes source coding and cryptography.
Since the advent of communication data transfer has been done through the non electronic media. Since the advent of the telephone the analog data has been transferred through the electric signals. Telegraphy and teletypewriters are the applications of data electromagnetic transmission which were firstly developed. These both are the digital signals. The utilization of data transfer has been done in the computers and the computer bases. These are for the communication with the peripheral equipment. Data transfer has also been utilized in the equipment of computer networking. These are like modems, local area network adapters, hubs, wireless network access points and the microwave links. There can be two types of data transfer like serial and the parallel transmission.
Sources and Citations