Flow Control
================

.. panels::
    :container: container-fluid p-4 bg-light
    :column: col-lg-12 p-2

    .. panels::
        :container: container pb-4
        :column: col-lg-12 p-2
        :card: shadow

        **What is Flow Control?**

        Flow control is a technique used in data communication to manage the rate at which data is sent between a sender and a receiver, preventing the receiver from being overwhelmed.

    .. panels::
        :container: container pb-4
        :column: col-lg-12 p-2
        :card: shadow

        **Why is Flow Control useful?**

        It prevents data loss by ensuring the sender does not transmit more data than the receiver can handle, especially when the receiver has limited buffer capacity.

    .. panels::
        :container: container pb-4
        :column: col-lg-12 p-2
        :card: shadow

        **How does Flow Control work?**

        Flow control works using mechanisms like **sliding window** and **stop-and-wait**, where the sender waits for acknowledgments or window updates before sending more data.

    .. panels::
        :container: container pb-4
        :column: col-lg-12 p-2
        :card: shadow

        **Where is Flow Control used?**

        Flow control is widely used in **TCP** connections, serial communication, and other protocols where reliable and orderly data transfer is necessary.

    .. panels::
        :container: container pb-4
        :column: col-lg-12 p-2
        :card: shadow

        **Which OSI layer does Flow Control belong to?**

        Flow control is primarily handled at the **Transport Layer (Layer 4)** of the OSI model, though it can also appear at the **Data Link Layer (Layer 2)**.

    .. panels::
        :container: container pb-4
        :column: col-lg-12 p-2
        :card: shadow

        **Is Flow Control Windows specific?**

        No, flow control is a protocol-level feature that works the same across all operating systems, including Windows, Linux, and macOS.

    .. panels::
        :container: container pb-4
        :column: col-lg-12 p-2
        :card: shadow

        **Is Flow Control Linux specific?**

        No, flow control is universally implemented across all platforms that support TCP/IP networking and serial communication protocols.

    .. panels::
        :container: container pb-4
        :column: col-lg-12 p-2
        :card: shadow

        **Which Transport Protocol is used by Flow Control?**

        **TCP** is the primary transport protocol that implements flow control through its windowing mechanisms.

    .. panels::
        :container: container pb-4
        :column: col-lg-12 p-2
        :card: shadow

        **Is Flow Control using client-server model?**

        No, flow control is a mechanism used in communication regardless of the model. However, it is especially important in client-server communication to avoid congestion and data loss.

.. panels::
        :container: container pb-4
        :column: col-lg-12 p-2
        :card: shadow

        Topics in this section,

                * :ref:`Learnings in this section <Flow_Control_step1>`

                * :ref:`Terminology <Flow_Control_step2>`

                * :ref:`Version Info <Flow_Control_step3>`

                * :ref:`Flow_Control Basic Setup on Ubuntu using IPv6 <Flow_Control_step18>`

                * :ref:`TCP Feature : Flow Control <Flow_Control_step4>`
                
                * :ref:`Reference links <Flow_Control_step17>`

.. _Flow_Control_step1:

.. tab-set::

    .. tab-item:: Learnings in this section

        * In this section, you are going to learn

.. _Flow_Control_step2:

.. tab-set::

    .. tab-item:: Terminology
        
       * Terminology


.. _Flow_Control_step3:

.. tab-set::

    .. tab-item:: Version Info
    
         * Version Info


.. _Flow_Control_step18:

.. tab-set::

   .. tab-item:: Flow_Control Basic Setup on Ubuntu using IPv6
       
      * setup

.. _Flow_Control_step4:

.. tab-set::

    .. tab-item:: TCP Feature : Flow Control

          **Flow Control - Testcases**

          .. csv-table:: 
                :file: ./TCP_Feature4_Flow_control_Test_Cases.csv
                :widths: 10,10,30,20
                :header-rows: 1

.. _Flow_Control_step17:

.. tab-set::

    .. tab-item:: Reference links
      
       * Reference links