SMB - Server Message Block
============================

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        **What is SMB?**

        SMB stands for Server Message Block. It is a network file sharing protocol that allows applications and users to read, write, and manage files, printers, and other resources on a remote server.

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        **Why is SMB useful?**

        * Enables seamless file and printer sharing over a network.
        * Supports access control, file locking, and network browsing.
        * Integrates tightly with Windows environments for authentication and resource sharing.
        * Used by network-attached storage (NAS) devices and enterprise file servers.

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        **How it works?**

        * A client sends SMB requests to a server to access shared resources (files, printers).
        * The server authenticates the client and grants or denies access based on permissions.
        * The client then performs operations like open, read, write, or delete files remotely.
        * SMB can also be used over the NetBIOS protocol or directly over TCP/IP (modern versions).

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        **Where is SMB used?**

        * In Windows-based networks for file and printer sharing.
        * In NAS devices to provide shared network drives.
        * In Linux and macOS systems via implementations like Samba.
        * In mixed-platform environments where interoperability is required.

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

        * SMB operates at the Application Layer (Layer 7) of the OSI model.
        * It uses lower layers like TCP/IP for data transmission.

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        **IS SMB Windows specific?**

        * No, SMB is not Windows-specific.
        * While it was developed by Microsoft and is native to Windows, it is supported on other platforms using implementations like Samba.

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        **IS SMB Linux Specific?**

        * No, SMB is not Linux-specific.
        * Linux systems can use SMB through Samba to access or provide file shares, but SMB itself is a cross-platform protocol.

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

        * Modern SMB versions (SMB 2.0 and above) use **TCP** as the transport protocol.
        * Older versions of SMB could operate over **NetBIOS**, which in turn could run over TCP or UDP.

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        **Which Port is used by SMB?**

        * SMB over NetBIOS uses ports **137-139**.
        * SMB over TCP (direct host) uses **port 445**, which is the default in modern SMB implementations.

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        **Is SMB using Client server model?**

        * Yes, SMB follows the client-server model.
        * Clients request access to shared resources, and servers respond by granting or denying access and performing requested operations.

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        Topics in this section,

                * :ref:`Learnings in this section <SMB_step1>`

                * :ref:`Terminology <SMB_step2>`

                * :ref:`Version Info <SMB_step3>`

                * :ref:`SMB Version&IEEE Details <SMB_step5>`

                * :ref:`SMB Basic Setup on Ubuntu using IPv4 <SMB_step18>`

                * :ref:`SMB Basic Setup on Ubuntu using IPv6 <SMB_step19>`

                * :ref:`SMB Protocol Packet Details <SMB_step6>`

                * :ref:`SMB Usecases <SMB_step7>`

                * :ref:`SMB Basic Features <SMB_step8>`
                    
                * :ref:`Reference links <SMB_step17>`


.. _SMB_step1:

.. tab-set::

    .. tab-item:: Learnings in this section

        * In this section, you are going to learn

.. _SMB_step2:

.. tab-set::

    .. tab-item:: Terminology
        
       * Terminology


.. _SMB_step3:

.. tab-set::

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


.. _SMB_step5:

.. tab-set::

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

        * rfc details

.. _SMB_step18:

.. tab-set::

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

       * setup

.. _SMB_step19:

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

     * setup
       
.. _SMB_step6:

.. tab-set::

    .. tab-item:: SMB Protocol Packet Details

        * packet details
       


.. _SMB_step7:

.. tab-set::

    .. tab-item:: SMB Usecases

       * usecases
        
        

.. _SMB_step8:

.. tab-set::

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



.. _SMB_step17:

.. tab-set::

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