Data Communication and Computer Network (DCCN)

Data:-

In DCCN Data is the information which will be used to communication agreed between the source and destination computing device.

Types of Data:-

Text Data:-Contains single or multiple line text.

Audio Data:- Contains audio file.

Multimedia:- Contains video file.

Communication:- In DCCN the message will transfer from source to destination through various number of communicating device.

Computer Network:-

When two or more number of devices are connected to a particular link then it is called as Network.

Components of computer network:-

Message:-It is a information or different contents to be transmitted.

Source:-

It is a computing device from where message will generated. All computers in a network setup is act as a Source.

Destination:-

It is a computing device from where message will reached. All computers in a network setup is act as a Destination.

Transmission Media:-

It is a medium through which message will transfer from source to destination.

Ex:- Cable, Air

Protocols:-

Protocols are set of rules and regulation that govern by data communication. Without protocol

computers are connected but not communicated.

Data Flow:-

Data can be transmitted in multiple way

                                                                i) Simplex

                                                                ii) Half Duplex

                                                                iii) Duplex

Simplex:-

In simplex mode dataflow data will be transmitted in one direction. i.e sender will send the data and receiver will always receive the data

Half Duplex:-

In Half Duplex mode dataflow data will be transmitted in bidirectional manner not at a time. The source can be a sender and receiver not at a time.

Duplex:-

In Half Duplex mode dataflow data will be transmitted in bidirectional at a time. Both the source and receiver can be a sender and receiver at a time.