IPv6 Addressing - NAT (Network Address Translation)
=======================================================

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        **What is NAT (Network Address Translation)?**

        NAT is a method used in IPv4 networks to map multiple private IP addresses to a single public IP address, enabling devices on a local network to access external networks.

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        **Why is NAT useful?**

        It conserves public IPv4 addresses and adds a layer of security by hiding internal network structure from external networks.

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        **How does NAT work?**

        NAT modifies the source IP address and sometimes the port numbers of packets leaving a private network and keeps track of these translations to properly route return traffic.

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        **Where is NAT used?**

        NAT is widely used in home routers, enterprise firewalls, and ISP networks to allow multiple devices to share a single public IPv4 address.

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        **Which OSI layer does NAT belong to?**

        NAT operates at the **Network Layer (Layer 3)** and sometimes at the Transport Layer (Layer 4) due to port translation.

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        **Is NAT Windows specific?**

        No, NAT functionality is implemented across all major operating systems and network devices.

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        **Is NAT Linux specific?**

        No, Linux supports NAT through tools like `iptables` and `nftables`.

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        **Which Transport Protocol is used by NAT?**

        NAT works with all transport protocols, including TCP, UDP, and ICMP, by translating IP addresses and ports.

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        **Is NAT using client-server model?**

        No, NAT is a network function that translates addresses and ports but does not depend on any communication model.

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        Topics in this section,

                * :ref:`Learnings in this section <NAT_step1>`

                * :ref:`Terminology <NAT_step2>`

                * :ref:`Version Info <NAT_step3>`

                * :ref:`Header Structure Basic Setup on Ubuntu using IPv6 <NAT_step18>`
                
                * :ref:`Reference links <NAT_step17>`

.. _NAT_step1:

.. tab-set::

    .. tab-item:: Learnings in this section

        * In this section, you are going to learn

.. _NAT_step2:

.. tab-set::

    .. tab-item:: Terminology
        
       * Terminology


.. _NAT_step3:

.. tab-set::

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


.. _NAT_step18:

.. tab-set::

   .. tab-item:: NAT Basic Setup on Ubuntu using IPv6

      * setup

.. _NAT_step17:

.. tab-set::

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