A data communications system has:

Data communication have five components:
a.Message
b.Sender
c.Receiver
d.Transmission Medium
e.Protocol

five components of data communication are:
1.data
2. Sender
3. medium
4. Receiver
5. Protocal

Five Components of Data Communications system are :
1. Sender.
2. Receiver.
3. Message.
4. Medium (Channel for communication).
5. Encoder/Decoder.

five components of data communication are:
1)- Message.
2)- Sender.
3)- Receiver.
4)- Medium.
5)- Protocol.

Data communication is a process of transferring data electronically from one place to another. Data can be transferred by using different medium. The basic components of data communications are as follows:
1. Message
2. Sender
3. Receiver
4. Medium/ communication channel
5. Encoder and decoder

1. Message
The message is the data or information to be communicated. It may consist of text, number, pictures, sound, video or any a combination of these.

2. Sender
Sender is a device that sends message. The message can consist of text, numbers, pictures etc. it is also called source or transmitter. Normally, computer is use as sender in information communication systems.

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

4. Medium
Medium is the physical path that connects sender and receiver. It is used to transmit data. The medium can be a copper wire, a fiber optic cable, microwaves etc. it is also called communication channel.

5. Encoder and decoder
The encoder is a device that converts digital signals in a form that can pass through a transmission medium. The decoder is a device that converts the encoded signals into digital form. The receiver can understand the digital form of message. Sender and receiver cannot communicate successfully without encoder and decoder.

the five major components of a data communications system are the message, sender, receiver, medium and protocol. All five are needed to work in tandem to send any data communications from the sender to the proper receiver.

1- Message
The message is the information or data that is to be communicated. It may consist of text, numbers, pictures, sounds, videos or any combination of these.

2- Sender
A device that is used for sending messages (or data) is called sender. It is also called transmitter or source. The sender can be a computer, telephone, or a video camera etc. Usually, a computer is used as sender in data communication system.


3- Receiver
A device that is used for receiving messages is called receiver. It is also known as sink. The receiver can be a computer, telephone set, printer, or a fax machine etc. Usually, a computer is also used as receiver in data communication system.

4- Medium
The path through which data is transmitted (or sent) from one location to another is called transmission medium. It is also called communication channel. It may be a wire, or fiber optic cable, or telephone line etc. If the sender and receiver are within a building, a wire is used as the medium. If they are located at different locations, the medium may be telephone line, fiber optics, microwave or satellite system.

5- Encoder and Decoder
In communication systems, computers are used for senders and receivers. A computer works with digital signals. The communication channels usually use analog signals. The encoder and decoder are used in communication systems to convert signals from one from to another.

Encoder: The encoder is an electronic device. It receives data from sender in the form of digital signals. It converts digital signals into a form that can be transmitted through transmission medium.

Decoder: The decoder is an electronic device. It receives data from transmission medium. It converts encoded signals (i.e. analog signals) into digital form.

the five major components of a data communications system are the message, sender, receiver, medium and protocol. All five are needed to work in tandem to send any data communications from the sender to the proper receiver.