VNC - Virtual Network Computing
==================================

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        **What is VNC?**

        VNC (Virtual Network Computing) is a graphical desktop-sharing system that uses the Remote Frame Buffer (RFB) protocol to remotely control another computer by transmitting keyboard, mouse, and display data.

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        **Why is VNC useful?**

        VNC is useful for remote technical support, system administration, and accessing desktops across networks or platforms. It allows users to view and interact with a remote system’s graphical desktop as if they were physically present.

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        **How it works?**

        VNC works by capturing the graphical output (framebuffer) of the host system and sending it over the network to a VNC client. The client sends back keyboard and mouse input, enabling full remote interaction. It is platform-independent and often works over simple network connections.

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        **Where is VNC used?**

        VNC is commonly used in:
        - IT support and troubleshooting
        - Headless server management
        - Remote desktop access for users
        - Educational environments and demonstrations

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        **Which OSI layer does this protocol belong to?**

        VNC operates primarily at the **Application Layer (Layer 7)** of the OSI model using the RFB protocol over TCP/IP.

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        **Is VNC Windows specific?**

        No, VNC is **not Windows specific**. It is a cross-platform protocol with both clients and servers available for Windows, macOS, Linux, and even mobile platforms.

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        **Is VNC Linux specific?**

        No, but VNC is widely used in Linux environments. Linux has multiple VNC servers like `TigerVNC`, `TightVNC`, and `x11vnc`, and is a common platform for VNC deployments.

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

        VNC uses **TCP** as its transport protocol for transmitting display and input data.

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        **Which Port is used by VNC?**

        By default, VNC uses **TCP port 5900** for the first display. Additional displays use **5901**, **5902**, and so on. VNC over HTTP (Java viewer) typically uses **port 5800**.

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        **Is VNC using Client server model?**

        Yes, VNC uses a **client-server model**. The **VNC server** runs on the machine to be controlled, and the **VNC client (viewer)** connects to it to display and interact with the remote desktop.

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        Topics in this section,

                * :ref:`Learnings in this section <VNC_step1>`

                * :ref:`Terminology <VNC_step2>`

                * :ref:`Version Info <VNC_step3>`

                * :ref:`VNC Version&IEEE Details <VNC_step5>`

                * :ref:`VNC Basic Setup on Ubuntu using IPv4 <VNC_step18>`

                * :ref:`VNC Basic Setup on Ubuntu using IPv6 <VNC_step19>`

                * :ref:`VNC Protocol Packet Details <VNC_step6>`

                * :ref:`VNC Usecases <VNC_step7>`

                * :ref:`VNC Basic Features <VNC_step8>`
                    
                * :ref:`Reference links <VNC_step17>`


.. _VNC_step1:

.. tab-set::

    .. tab-item:: Learnings in this section

        * In this section, you are going to learn

.. _VNC_step2:

.. tab-set::

    .. tab-item:: Terminology
        
       * Terminology


.. _VNC_step3:

.. tab-set::

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


.. _VNC_step5:

.. tab-set::

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

        * rfc details

.. _VNC_step18:

.. tab-set::

    .. tab-item:: VNC Basic Setup on Ubuntu using IPv4

       * setup

.. _VNC_step19:

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

     * setup
       
.. _VNC_step6:

.. tab-set::

    .. tab-item:: VNC Protocol Packet Details

        * packet details
       


.. _VNC_step7:

.. tab-set::

    .. tab-item:: VNC Usecases

       * usecases
        
        

.. _VNC_step8:

.. tab-set::

    .. tab-item:: VNC Basic Features
    
        * features 



.. _VNC_step17:

.. tab-set::

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