What Are The Five Major Components Of Data Communication System?

The five major components of a data communication system are a Message, a Sender, a Receiver, a Transmission Medium and Protocol.
The message is the information to be communicated. This can be anything from text and pictures to audio and video. A Sender is a device which sends the data messages. This can be anything from a computer or laptop, to a workstation or a mobile phone. A Receiver is pretty much the same, except it is receiving the information. Generally receivers can also send, but sometimes they clash in terms of compatibility due to differences in technology.
A Transmission Medium is the physical path by which a message travels from sender to receiver. This can be by wire, or wireless. It can be by coaxial cable, fibre optics, or by radio waves. The Protocol is the final piece. These are the rules that govern the data communications and transfers. It represents an agreement between the communicating devices, i.e. The agreement to allow the sender access to deliver to the receiver unchallenged. Text messages transfer unchallenged, but a Bluetooth connection requires confirmation.
Devices can be connected but not communication if protocol is not confirmed. An example of this is connecting a USB device. Most devices now are Plug and Play, meaning the computer confirms protocol and opens a gateway to the device in order to allow file transfer. However, in devices that aren't Plug and Play, these need software installed in order to install protocol and validate it upon connection.
Simply put, the general order of the relationship is that the Sender (or Transmitter) sends the Message via the Transmission Medium to the Receiver; all the while adhering to Protocol confirmed between the Sender and Receiver prior to the communication.

1.message
2.sender
3.receiver
4.transmission medium
5.protocal

Components of Data Communication:
I. Message. The message is the information (data) to be communicated. Popular
forms of information include text, numbers, pictures, audio, and video.
I Sender. The sender is the device that sends the data message. It can be a computer,
workstation, telephone handset, video camera, and so on.
3. Receiver. The receiver is the device that receives the message. It can be a computer,
workstation, telephone handset, television, and so on.
-1.. Transmission medium. The transmission medium is the physical path by which
a message travels from sender to receiver. Some examples of transmission media
include twisted-pair wire, coaxial cable, fiber-optic cable, and radio waves.
SECTION 1.1 DATA COMMUNICATIONS 5
5. Protocol. A protocol is a set of rules that govern data communications. It represents
an agreement between the communicating devices. Without a protocol, two
devices may be connected but not communicating, just as a person speaking French
cannot be understood by a person who speaks only Japanese.

Message, sender ,receiver, medium, and protocol

Sender
communication medium
receiver
modem
protocol

A Data Communication System is basically a system which is responsible for the communication of data and information. It has definite set of components that help in making communication of data possible.

Following are the main components of a Data Communication system:

- Central Computer
- Control Programs
- Terminals
- Modem
- Data Communication Media
- Data transmission Modes and Networking.

Components of Data Communication:
The five elements of data communication are as follows:
1. Message
Message is the information to be communicated. The message may consist of text, numbers, pictures etc.
2. Sender
Sender is a device that sends the message. Normally, computer is used as sender in data communication systems. It is also called source or transmitter.
3. 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.
4. Receiver
Receiver is a device that receives message. It is also called sink. The receiver can be computer, printer, or another computer related device. It must be proficient of accommodating the message.
5. Protocol
A protocol is a set of policies that administrates data communication. It represents an agreement between communication devices. Devices cannot communicate without protocol.

Message
sender
receiver
medium
protocol

Introduction to telecommunications, by Rosengrant, states:
1-Transmitter
2-Transducer
3-Switch Hook
4-Dial pad
5-Receiver

There are five major components of  data communication
meesage
sender
medium
reciever
context
feedback

A data communication system is consist of different components that are used to work together to transfer data from one place to another. These are central computer, control programs, terminals, modem, data communication media, data transmission modes and networking. The computers that manages transmission of data between different computers is called central computer.

The computer that manages transmission of data between different computers called central computer. It is part of the data communication system. Large computers such as mainframe computers, mini computers etc are used for central computers. Control programs control the flow of the data from one computer to the other. These are operating systems that control the working of the computers.

A terminal is the basic communication unit. Many persons can work on a single computer by connecting many terminals to the large computer. Through telephone line data transfer from one place to other in form of analog signals. Thus for transferring data from one computer to another computer through telephone line, digital signals must be converted to analog signals. For receiving digital signals by another computer these analog signal must be converted into digital signals. Different data transmission modes are used such as cable, microwave etc.

1. Delivery
The system must deliver data to the correct destination. Data must be received by the intended device or user.
2. Accuracy
The system must deliver data accurately. Data that have been altered in transmission and left uncorrected are unusable.
3. Timeliness
The system should transfer data within time. Data becomes useless if it is delivered late. In case of video, audio and voice data, timely delivery means that data is delivered as it is produced. This type of delivery is called real-time transmission.

Components of Data Communication:
The five elements of data communication are as follows:
1. Message
Message is the information to be communicated. The message may consist of text, numbers, pictures etc.
2. Sender
Sender is a device that sends the message. Normally, computer is used as sender in data communication systems. It is also called source or transmitter.
3. 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.
4. Receiver
Receiver is a device that receives message. It is also called sink. The receiver can be computer, printer, or another computer related device. It must be proficient of accommodating the message.
5. Protocol
A protocol is a set of policies that administrates data communication. It represents an agreement between communication devices. Devices cannot communicate without protocol.

1.  Data.
2.  Communication medium.

Sender, message, transmission media, receiver ,protocol rules.

Encoding form modulation

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