13 Apr Introduction to Computer Networks

When there is exchange of data in the form of 0s and 1s between two devices is termed as Data Communication. The exchange can be through transmission mediums such as coaxial cable, twisted pair cable, etc.

Data is represented in the form of 0s and 1s, under computer information systems. This representation is by binary information units or bits.

Data communication can be of two forms on the basis of area,

1. Local– Data Communication is local, when the devices are in the same geographical area.
2. Remote– Data Communication is local, when the devices are quite far.

Data communication is successful, if it follows the following,

• The data is delivered to the correct destination.
• The data delivered is accurate.
• Late delivery of data is of no use, so it should get delivered on time.

Components

What data communication consists of? Let’s discuss it here,

• Message- A message is what gets transmitted from one place to another. The message can be in the form of audio, video, text, images, documents, etc.
• Sender- Sender sends a message. It can be in the form of a computer, video camera, etc.
• Receiver- Receiver receives the message. It can be in the form of a computer, video camera, workstation, etc.
• Medium- A message is transmitted from sender to receiver via a medium, which can also be said as a path. For example, coaxial cable, laser, etc.
• Protocol- Protocol is a set of rules. It governs data communication, as an agreement between two or more devices.

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