Data Communication in Computer Network: Definition of Communication for DRDO 2020

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Data Communication in Computer Network: Definition of Communication (Computer Science)

Data Communication in Computer Network

  • Topics:

    • Definition of Communication

    • Components of Communication

    • Working of Communication System

    • Modes of Communication:- Simplex, Half-Duplex and Full-Duplex

    • Signals:- Analog and Digital Signals

Definition of Communication

  • The process of creating and understanding through exchange of messages or symbolic interactions.

  • The information is exchanged between individuals through common system of symbols and signs of behaviour.

  • We send and receive messages in communication process. It is a two-way process.

  • The devices which need to be the integral part of the communication system can be hardware and software.

Working of Communication System

Illustration 1 for Working of Communication System

Illustration 1 for Working of Communication System

Illustration 2 for 5 Basic Components of Data Communication

Illustration 2 for 5 Basic Components of Data Communication

5 Basic Components of Data Communication

Modes of Communication

  • Simplex: In this mode of communication, direction is unidirectional i.e. in one direction.

Direction Data

Direction Data

  • Half Duplex: If the data travels in both directions between two workstations or systems but not at same time.

Bidirectional

Bidirectional

  • Full Duplex: If the data travels in both directions between two workstations or systems is called as full duplex mode of communication simultaneously.

Simultaneously

Simultaneously

Signals

Electrical Signal

Electrical Signal

Analog and Digital

Analog and Digital

  • Analog Signals: These are in the continuous wave form. These can have infinite range of values and they smoothly get changed with the change in the time period.

  • Digital Signals: These signals are discrete and they have two definite values i.e. 0 or 1 (down and up). These are easier to work as compared to the analog signals.

Mcq

Q1.In broad sense, a railway track is an example of?

Options:

  1. Simplex

  2. Half-duplex

  3. Full-duplex

  4. All of these

Q1.In broad sense, a railway track is an example of?

Options:

  1. Simplex

  2. Half-duplex

  3. Full-duplex

  4. All of these

Q2.A device that converts digital signals to analog signals are?

Options:

  1. A packet

  2. A message

  3. A Modem

None of these

Q2.A device that converts digital signals to analog signals are?

Options:

  1. A packet

  2. A message

  3. A modem

  4. None of these

Q3.Compared to analog signals, digital signals are:

Options:

  1. Faster transmission of data

  2. Are more accurate

  3. Both 1 and 2

  4. None of these

Q3. Compared to analog signals, digital signals are:

Options:

  1. Faster transmission of data

  2. Are more accurate

  3. Both 1 and 2

  4. None of these

# Definition of Communication

# Working

#Components

#Simplex Communication

#Half-Duplex Communication

#Full-Duplex Communication

#Analog Signals

#Digital Signals

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