Define Simplex, Half Duplex and Full Duplex?

What are Data Transmission Modes?

There are following three modes to transmit data from one device to another:-

• Simplex
• Half Duplex
• Full Duplex

Simplex Mode:-


In simplex mode, It is mode of communication between two devices.   The flow of data is unidirectional between devices i.e the communication take place in one direction. In it one can receive and other can transmit. In simplex mode the flow of data is unidirectional then it is rarely used for data communication. 


Example:-

• Monitor
• Keyboard

Half Duplex Mode:-

In Half duplex mode, It is mode of communication between two devices. The flow of data is bidirectional between devices but not at same the time i.e each can receive and transmit data but not at the same time. Thus in half duplex mode we can send and receive data in a line but not at same time.

Example:-

• Walkie-Talkie

Full Duplex Mode:-

In Full duplex mode, It is mode of communication between two devices. The flow of data is bidirectional between devices and at the same time i.e each can receive and transmit data at the same time. Use of full duplex mode increase the efficiency of communication. 

Example:-

• Telephone

Define Data Communication?

What is Data Communication ?

We know communication is the process of sharing information from one to another. For example the conversation between two people. Data Communication is the exchange of  data between between two devices via some form of transmission media such as wire. It is the transmission of digital data and has the objective to send data at highest speed but lowest cost. Electronic communications like emails and instant messages as well as telephone calls are examples of data communications. The effectiveness of a data communication system depends on the following charcteristics:-

• Delivery
• Accuracy
• Timeliness.

Basic Terms Used In Data Communication:-

• Data:- Collection of facts(Raw Forms)
• Signals:- Encoding of data.
• Signaling:- Propagation of signals via communication medium.
• Transmission:- Communication of data by processing of signals.

What do you mean By CN?

What do you mean By CN?

CN stands for Computer Network. It is a collection of computers and devices that shares the information across wired or wireless technology. Computer networking needs at least two computers, hardware to connect them and a protocol. Computer networks allow people and machines to communicate, using a number of services. Computer network provide us facility of communication. We can easily communicate to people via emails, chat, telephone and voice and video conferencing. We can share data, files and and other important information easily. We can also use resources provided by devices on the network such as printer.