Data Communication & its Component

What is data communication? Explain the basic component of communication network?

 Data communication is a process of transferring data electronically from one place to another. Data can be transferred by using different medium. The basic component of data communication are as follows:

          · Message:

The message is the data or information to be communicated. It may consist of text, number, picture, sound and videos etc.

          · Sender:

Sender is the device that sends the message. It is also called source or transmitter.

          · Receiver:

Receiver is the device that receives the message. It also called sink. The receiver can be a computer, printer or any related device. The receiver must be capable of accepting the message.

          · Medium:

Medium is the path that connect the sender and receiver. It is used to transmit data. The medium can be a physical cable or wireless medium.

          · Encoder and Decoder:

The encoder is a device that converts digital signal into analog signal and decoder is a device that converts analog signal into digital signal. The sender and receiver cannot communicate successfully without encoder and decoder.