Lightweight Header
=====================

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        **What is a Lightweight Header in UDP?**

        The UDP header is minimal, consisting of only 8 bytes, containing just the essentials: source port, destination port, length, and checksum.

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        **Why is the Lightweight Header useful in UDP?**

        It reduces processing overhead, making UDP faster and more efficient for time-sensitive applications like DNS, VoIP, and streaming.

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        **How does UDP achieve a Lightweight Header?**

        By excluding complex mechanisms like sequencing, acknowledgment, and congestion control that are present in TCP, the UDP header stays small and simple.

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        **Where is the Lightweight Header of UDP used?**

        It is ideal in applications where speed and low overhead matter more than reliability—like DNS queries, SNMP monitoring, online gaming, and live video/audio streaming.

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        **Which OSI layer does the Lightweight Header relate to?**

        The UDP header operates at the **Transport Layer (Layer 4)** of the OSI model, just above IP at the Network Layer.

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        **Is UDP’s Lightweight Header Windows specific?**

        No, the UDP protocol and its lightweight header are part of the standard TCP/IP stack and supported on all operating systems, including Windows.

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        **Is UDP’s Lightweight Header Linux specific?**

        No, Linux also fully supports UDP and its minimal header structure. It's widely used in Linux networking tools and services.

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        **Which Transport Protocol uses a Lightweight Header?**

        **UDP (User Datagram Protocol)** is the primary transport protocol that uses a lightweight header for fast, low-latency communication.

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        **Is Lightweight Header used in client-server model?**

        Yes, many client-server applications like DNS and DHCP use UDP with its lightweight header for quick request-response communication without needing a persistent connection.

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        Topics in this section,

                * :ref:`Learnings in this section <Lightweight_Header_step1>`

                * :ref:`Terminology <Lightweight_Header_step2>`

                * :ref:`Version Info <Lightweight_Header_step3>`

                * :ref:`Lightweight Header Basic Setup on Ubuntu using IPv4 <Lightweight_Header_step18>`

                * :ref:`UDP Feature : Lightweight Header <Lightweight_Header_step4>`
                
                * :ref:`Reference links <Lightweight_Header_step17>`

.. _Lightweight_Header_step1:

.. tab-set::

    .. tab-item:: Learnings in this section

        * In this section, you are going to learn

.. _Lightweight_Header_step2:

.. tab-set::

    .. tab-item:: Terminology
        
       * Terminology


.. _Lightweight_Header_step3:

.. tab-set::

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


.. _Lightweight_Header_step18:

.. tab-set::

   .. tab-item:: Lightweight Header Basic Setup on Ubuntu using IPv4
       
      * setup

.. _Lightweight_Header_step4:

.. tab-set::

   .. tab-item:: UDP Feature : Lightweight Header

         **Lightweight Header - Testcases**

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                 :file: ./UDP_Feature8_Lightweight_header_Test_Cases.csv
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.. _Lightweight_Header_step17:

.. tab-set::

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