mosh - Mobile Shell
======================

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        **What is Mosh?**

        Mosh (Mobile Shell) is a remote terminal application similar to SSH but designed to work better in mobile and unstable network environments. It supports roaming, intermittent connectivity, and intelligent local echo and line editing.

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        **Why is Mosh useful?**

        * Maintains session even if the IP address changes (e.g., switching networks).
        * Automatically reconnects after temporary network loss.
        * Reduces perceived latency through local echo.
        * More responsive than SSH on high-latency connections.
        * Ideal for users working remotely or on mobile networks.

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        **How it works?**

        * Mosh starts by using SSH to authenticate and establish an initial session.
        * It then starts a `mosh-server` on the remote machine and connects using a custom UDP-based protocol.
        * The client and server communicate over UDP, enabling session continuity even with network changes.
        * Mosh predicts user input locally and updates when the server responds, providing fast feedback.

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        **Where is Mosh used?**

        * Remote system administration over unstable or mobile networks.
        * Developers and sysadmins working over Wi-Fi, cellular, or satellite links.
        * Any situation where SSH performance is affected by latency or roaming.

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

        * Mosh operates primarily at the **Application Layer (Layer 7)**.
        * It uses **UDP** at the Transport Layer but implements its own reliability and state tracking.

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        **IS Mosh Windows specific?**

        * No, Mosh is not Windows-specific.
        * While originally built for Unix-like systems, Mosh clients can be used on Windows via WSL, Cygwin, or compatible ports.

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        **IS Mosh Linux Specific?**

        * No, Mosh is not Linux-specific, though it's primarily used on Linux, macOS, and BSD.
        * The server side is usually installed on Unix-like systems, but clients can run on multiple platforms.

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

        * Mosh uses **UDP** for all communication after the initial SSH connection.
        * It implements its own protocol on top of UDP for reliability and encryption.

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        **Which Port is used by Mosh?**

        * Mosh uses **UDP ports in the range 60000–61000** by default.
        * The actual port is chosen randomly and communicated during the SSH handshake.

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        **Is Mosh using Client server model?**

        * Yes, Mosh uses the **client-server model**.
        * The **client** initiates a session via SSH, then switches to a UDP-based connection with the **mosh-server** running on the remote system.

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        Topics in this section,

                * :ref:`Learnings in this section <mosh_step1>`

                * :ref:`Terminology <mosh_step2>`

                * :ref:`Version Info <mosh_step3>`

                * :ref:`mosh Version&IEEE Details <mosh_step5>`

                * :ref:`mosh Basic Setup on Ubuntu using IPv4 <mosh_step18>`

                * :ref:`mosh Basic Setup on Ubuntu using IPv6 <mosh_step19>`

                * :ref:`mosh Protocol Packet Details <mosh_step6>`

                * :ref:`mosh Usecases <mosh_step7>`

                * :ref:`mosh Basic Features <mosh_step8>`
                    
                * :ref:`Reference links <mosh_step17>`


.. _mosh_step1:

.. tab-set::

    .. tab-item:: Learnings in this section

        * In this section, you are going to learn

.. _mosh_step2:

.. tab-set::

    .. tab-item:: Terminology
        
       * Terminology


.. _mosh_step3:

.. tab-set::

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


.. _mosh_step5:

.. tab-set::

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

        * rfc details

.. _mosh_step18:

.. tab-set::

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

       * setup

.. _mosh_step19:

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

     * setup
       
.. _mosh_step6:

.. tab-set::

    .. tab-item:: mosh Protocol Packet Details

        * packet details
       


.. _mosh_step7:

.. tab-set::

    .. tab-item:: mosh Usecases

       * usecases
        
        

.. _mosh_step8:

.. tab-set::

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



.. _mosh_step17:

.. tab-set::

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