Definition- The transmitting and receiving information process transfers information and data within and between information systems.
- This transfer of data occurs between components within a single computer, such as the transfer of data between RAM and the CPU.
- It occurs whenever peripheral devices are used, such as keyboards, printers and modems.
- It also occurs between computers when communicating using local areas networks and wide area networks such as the Internet.
Communication - For communication to take place both transmitting and receiving must occur successfully.
- Transmitting involves the sender encoding the message and transmitting it overthe medium.
- Receiving involves the receiver understanding the organisation of the encoded message and decoding it into a form suitable for its use.
- In essence both encoding and decoding are organising information processes.
- Encoding organises the data into a form suitable for transmission along the communication medium.
- Decoding changes the organisation of the received data into a form suitable for subsequent information processes.
- For example, in Organising Chapter we examined how keyboards encode each keystroke into an electrical signal representing the scan code of the key pressed.
- This signal is transmitted down the interface cable.
- The computer receives the signal and decodes it into its corresponding ASCII code.
Transmitting and receiving information processes are an integral part of all other information processes. - Whenever communication between hardware components occurs transmitting and receiving information processes are also occurring.
- As all information processes are performed using a variety of different hardware tools then it follows that transmitting and receiving processes must also be occurring.
- For example:
- Scanning an image using a flatbed scanner.
- Creating a graph using a spreadsheet.
- Backing up data to magnetic tape.
- The CPU executing a machine language instruction.
- Surfing the web using an Internet browser.
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