Data communication is the transmission of digital data between computers and networks, enabling the exchange of information regardless of location or medium. The effectiveness of this system relies on delivery, accuracy, and timeliness. Key components include the sender, message, receiver, transmission media, and encoder/decoder, which ensures proper communication protocols and data handling.

1. Data Communication

2. What is Data
Communication?

3. Data Communication
refers to the transmission of this
digital data between two or more computers
and a computer network or data network is a
telecommunications network that allows
computers to exchange data.

4. Data communications (DC) is the process of
using computing and communication
technologies to transfer data from one place
to another, and vice versa. It enables the
movement of electronic or digital data
between two or more nodes, regardless of
geographical location, technological
medium or data contents.

5. FUNDAMENTAL
CHARACTERISTICS
OF DATA
COMMUNICATION

6. The effectiveness of a data communication system depends
on three characteristics.
1. Delivery: The system must deliver data to
the correct destination.
2. Accuracy: The system must deliver data
accurately.
3. Timeliness: The system must deliver data
in a timely manner.

7. Components of Data
Communication

8. Sender is a device or
person that sends the data. It
can be sent using a computer,
telephone, or camera.

9. Sender

10. Message is the information
(Data) to be communicated; it
may be an image, text, number,
Audio, or Video.

11. Message

12. Receiver is a device or
person that receives the data. It
can be received whether by
using a telephone, computer,
television.

13. Receiver

14. Transmission media or
Medium is the physical path by
which message travel from source
to destination (sender to receiver)
example –twisted pair, coaxial
cable, fiber optic, radio waves.

15. Medium

17. Encoder/ Decoder is a set
of rules that govern data
communication. It provide agreement
between sender and receiver devices.
It encodes and decodes the message
from verbal to computer or from hard
copies to soft copy.

18. Encoder-Decoder

19. An Encoder-Decoder performs
the following functions:
1. Data sequencing.
2. Data routing.
3. Data formatting.
4. Flow control.
5. Error control.
6. Precedence and order of transmission.
7. Connection establishment and termination.
8. Data security.
9. Log information.