Computer Networking – transmission media for Competitive Exams

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Computer Networking:

  • A computer networking is a set of connected computers.

  • Computers on a network are called nodes.

  • The connection between computers can be done via cabling, most commonly the Ethernet cable, or wirelessly through radio waves.

  • Connected computers can share resources, like access to the Internet, printers, file servers, and others.

Components:

  1. Server – a computer designed to process requests and deliver data to other (client) computers over a local network or the Internet.

  2. Receiver – a hardware module or device used to receive signals

  3. Channel – physical connection between Server & Receiver

Diagram shows components of computer networking

Components of Computer Networking

Diagram shows components of computer networking

Transmission Channel:

  • Transmission mode means transferring of data between two devices.

  • It is also known as communication mode.

  • Buses and networks are designed to allow communication to occur between individual devices that are interconnected.

There are three types of transmission mode:

This diagram shows Transmission Channel

Types of Transmission Channel

This diagram shows Transmission Channel

Simplex channels – simplex is a communication channel that operates in one direction at a time.

This diagram shows Simplex One Direction

Simplex Channels

This diagram shows Simplex One Direction

Half duplex channel – A half-duplex channel can sent and receive data, but not at the same time.

Thid diagram shows sender and receiver send and receive message

Half Duplex Channel

Thid diagram shows sender and receiver send and receive message

Full duplex channel – Refers to the transmission of data in two directions simultaneously.

This diagram shows full duplex channel

Full Duplex Channel

This diagram shows full duplex channel

Types Data communication medium

  • Standard Telephone Line

    A telephone line is a single-user circuit on a telephone communication system.

  • Co-Axis Cable

    It is used as a transmission line for radio frequency signals. Its applications include feed lines connecting radio transmitters and receivers with their antennas, computer network connections, and digital audio and distributing cable television signals.

  • Microwave Transmission

    Microwaves are widely used for point-to-point communications because their small wavelength allows conveniently-sized antennas to direct them in narrow beams, which can be pointed directly at the receiving antenna.

  • Satellite Communication

    Its utilization has become widespread and ubiquitous throughout the country for such diverse applications like Television, DTH Broadcasting, DSNG, and VSAT to exploit the unique capabilities in terms of coverage and outreach.

  • Optical Fibers

    It can be used as a medium for telecommunication and computer networking because it is flexible and can be bundled as cables.

This diagram shows types of data communication medium

Types of Data Communication Medium

This diagram shows types of data communication medium