Question

Is there is difference between Data communication and speed of communication?​

Answer 1

Answer:

While analog transmission is the transfer of a continuously varying analog signal over an analog channel, digital communications is the transfer of discrete messages over a digital or an analog channel. ... Data transmitted may be digital messages originating from a data source, for example a computer or a keyboard.

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Answer 2

Answer:

Data communication refers to the exchange of data between a source and a receiver. Data communication is said to be local if communicating devices are in the same building or a similarly restricted geographical area.

The meanings of source and receiver are very simple. The device that transmits the data is known as source and the device that receives the transmitted data is known as receiver. Data communication aims at the transfer of data and maintenance of the data during the process but not the actual generation of the at the source and receiver.

A data communication system may collect data from remote locations through data transmission circuits, and then outputs processed results to remote locations.

There are data communication jargons to contend with such as baud rate, modems, routers, LAN, WAN, TCP/IP, ISDN, during the selection of communication systems.