Introduction To Data Communication
Data communication is the exchange of data between two devices via some form of transmission medium. For data communication to occur, the communication devices must be part of the communication system. The data communication system is made up of hardware and software.
Hardware is physical
equipment or components and software include programs. Thus the basic aim of
data communication and networking is to be able to exchange data such as text,
audio, and video from one point to another.
Data
Communication Model
The data communication
model is consists of three systems such as source, transmission and destination
system. It has five components as follows:
- Source
- Transmitter
- Transmission System
- Receiver
- Destination
The following shows the
basic block diagram of data communication Model in computer networks
Components of Data
Communication Model
The following are the communication of data communication Model
Source
The device generates the data to be transmitted. For example, telephones
and Personal Computers
Transmitter
The data generated by the source is not directly transmitted. The
transmitter is used to convert data into electromagnetic signals. For example,
Modem ( modulator and demodulator). The modem takes a digital bit from a
personal computer and transforms it into an analog signal.
Transmission System
A Transmission system can be a single transmission line or complex
network connectivity between source and destination system.
Receiver
The receiver accepts the signal from the transmission system and
converts it into a form that is handled by the destination device. For example,
A Modem accepts an analog signal and convert it into a digital bit stream.
Destination
A Destination takes the incoming data from the receiver.
Post a Comment
If you have any doubts, please let me know