Transmission modes in computer networks

 Transmission modes refer to methods of transferring data between devices, also known as communication modes. These modes facilitate communication on buses and networks among interconnected devices. There are three main types:

1. Simplex Mode

   - Description: Communication is unidirectional, akin to a one-way street.

   - Example: Keyboard input to a monitor.

   - Advantages:

    - Simplest and most reliable mode.

    - Cost-effective with one communication channel.

     - No need for coordination between devices.

     - Ideal for applications not requiring feedback, like broadcasting.

   - Disadvantages:

     - Only one-way communication.

     - No verification of data reception.

     - Unsuitable for bidirectional communication needs.


2. Half-Duplex Mode

   -Description: Devices can both transmit and receive, but not simultaneously.

   - Example: Walkie-talkies, where communication alternates directions.

   - Advantages:

     - Allows bidirectional communication.

     - More efficient than simplex, utilizing the channel for both transmission and reception.

     - Less expensive than full-duplex, needing only one channel.

   - Disadvantages:

     - Less reliable than full-duplex due to the inability to transmit simultaneously.

     - Transmission and reception delays.

     - Requires coordination between devices, complicating communication.


3. Full-Duplex Mode

   - Description: Simultaneous transmission and reception of data between devices.

   - Example: Telephone networks, where both parties can talk and listen at the same time.

   - Advantages:

     - Enables real-time, bidirectional communication, perfect for video conferencing and online gaming.

     - Most efficient, with simultaneous data transfer.

     - High reliability and accuracy without error correction mechanisms.

   - Disadvantages:

     - Most expensive due to the need for two communication channels.

     - More complex setup with either two separate paths or divided channel capacity.

     - Requires high bandwidth, making it unnecessary for some applications.


These modes cater to different communication needs, balancing simplicity, cost, efficiency, and complexity.

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