IPv6 - Internet Protocol version 6
===================================

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        **What is IPv6?**
       
        IPv6 stands for Internet Protocol version 6. It is the successor to IPv4, designed to solve the problem of IP address exhaustion.  
        IPv6 uses 128-bit addresses, allowing for a vastly larger number of unique IP addresses compared to IPv4's 32-bit system.

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        **Why is IPv6 useful?**

        * IPv4 addresses are running out due to the explosion of internet-connected devices.  
        * It supports more efficient routing and better security features.  
        * It enables end-to-end connectivity without the need for NAT (Network Address Translation).  
        * It simplifies network configuration with auto-configuration capabilities.

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        **How it works?**

        * Device gets an IPv6 address — either via DHCPv6 or Stateless Address Autoconfiguration (SLAAC).  
        * Packets are created with IPv6 headers — including source and destination IPv6 addresses.  
        * Routers forward packets — based on the destination IPv6 address.  
        * Target device receives data — and processes the packet if the address matches.

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        **Where is IPv6 used?**

        * Modern internet infrastructure — ISPs, cloud providers, and large enterprises are adopting IPv6.  
        * Mobile networks — many cellular networks use IPv6 by default.  
        * IoT devices — IPv6 supports the massive scale of connected devices.  
        * Next-gen applications — that require direct, scalable, and secure communication.

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        **Which OSI Layer does IPv6 operate at?**

        * IPv6 operates at the **Network Layer (Layer 3)** of the OSI model.  
        * It provides logical addressing and routing between devices across different networks.  
        * It encapsulates data into packets and ensures they reach the correct destination.

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        **Is IPv6 Windows specific?**

        No, IPv6 is not Windows specific. It is supported by all major operating systems, including Windows, Linux, and macOS.

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        **Is IPv6 Linux specific?**

        No, IPv6 is not Linux specific. It is a standard internet protocol implemented across all modern networked systems.

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        **Which Transport Protocol is used by IPv6?**

        IPv6 works with multiple transport protocols, primarily TCP and UDP, just like IPv4. It also supports ICMPv6 and others.

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        **Which Port is used by IPv6?**

        IPv6 does not use a specific port. Applications running over IPv6 use the same port numbers as they would with IPv4 (e.g., HTTP uses port 80, SSH uses port 22).

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        **Is IPv6 using client-server model?**

        IPv6 supports the client-server model as well as peer-to-peer communication, just like IPv4. It is not restricted to one model of communication.

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        Topics in this section,

                * :ref:`Learnings in this section <IPv6_step1>`

                * :ref:`Terminology <IPv6_step2>`

                * :ref:`Version Info <IPv6_step3>`

                * :ref:`IPv6 Version&RFC Details <IPv6_step5>`

                * :ref:`IPv6 Basic Setup on Ubuntu using IPv6 <IPv6_step20>`

                * :ref:`IPv6 Protocol Packet Details <IPv6_step6>`

                * :ref:`IPv6 Usecases <IPv6_step7>`

                * :ref:`IPv6 Basic Features <IPv6_step8>`
                    
                * :ref:`Reference links <IPv6_step19>`


.. _IPv6_step1:

.. tab-set::

    .. tab-item:: Learnings in this section

        * In this section, you are going to learn

.. _IPv6_step2:

.. tab-set::

    .. tab-item:: Terminology
        
       * Terminology


.. _IPv6_step3:

.. tab-set::

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


.. _IPv6_step5:

.. tab-set::

    .. tab-item:: IPv6 Version&RFC Details

        
         .. csv-table:: 
               :file: ./ipv6/IPv6_Version_RFC_details.csv
               :widths: 10,10,10,30
               :header-rows: 1

.. _IPv6_step20:

.. tab-set::

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

       * Setup



.. _IPv6_step6:

.. tab-set::

    .. tab-item:: IPv6 Protocol Packet Details
       
         **IPv6 Packet**

         .. csv-table:: 
                :file: ./ipv6/IPv6_Packetdetails1.csv
                :widths: 10,20,30,10
                :header-rows: 1

.. _IPv6_step7:

.. tab-set::

    .. tab-item:: IPv6 Usecases
        
        
         .. csv-table:: 
               :file: ./ipv6/IPv6_Use_Cases.csv
               :widths: 10,20,30
               :header-rows: 1

.. _IPv6_step8:

.. tab-set::

    .. tab-item:: IPv6 Basic Features
    
         
         .. csv-table:: 
                  :file: ./ipv6/IPv6_Basic_Features.csv
                  :widths: 10,10,30
                  :header-rows: 1



.. _IPv6_step19:

.. tab-set::

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