Data Communication

Labay,Bae Hasliya M.

What is Data Communicatio

n?

Data Communicationrefers 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.

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.

FUNDAMENTAL CHARACTERISTIC

S OF DATA COMMUNICATION

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.

Components of Data Communication

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

Sender

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

Message

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

Receiver

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.

Medium

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.

Encoder-Decoder

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.