Data Communication:

Generally the transfer of data is referred as Data Communication. In other words, Data communication is the exchange of data between two devices via some form of transmission medium.

Types Of Data Communication:

There are three different types of computer data transmission are available. They are

1.Processor to Processor

2.Personal Computer to Host Computer

3.Personal Computer to Personal Computer

1.Processor to Processor:

This communication normally refers to the communication between two or more computers to interchange large quantities of data such as bulk update of files or records and so on. This communication also refers to the communication which takes place between two or more computers when working in tandem. This type of communication leads to be very fast and often takes place between computers in the same area.

2.Personal Computer to Host Computer:

The personal computer can send,receive and stores the information from another large computer, which is normally the host computer. It can be a high-end server or a mid-range server. The host computer serve the data to the personal computer.

3.Personal Computer to Personal Computer:

Normally personal computers can communicate with each other on a one-to-one basis. They exchange the information freely with one another. This communication can also be classified into two. They are

a.Online Communication

b.Offline Communication

a.Online Communication:

In this communication, a direct connection is made between the devices interchanging information, and the transfer occurs almost instantaneously. The time taken for the actual data transfer depends on the amount of data to be transmitted and the capacity of the line.

b.Offline Communication:

In this communication, the transfer of information is not immediate. The data is prepared for subsequent transmission. This type of communication is a batch process, because the data is processed in batches and is then communicated at a predetermined time.