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179 lines
6.6 KiB
HTML
179 lines
6.6 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<!-- index.html (C) K. J. Turner 18/12/14 -->
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>Protocol Simulators</title>
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<link rev="made" href="http://www.cs.stir.ac.uk/~kjt/"/>
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</head>
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<body background="simulator.jpeg">
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<div style="text-align: center">
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<h1>Protocol Simulators</h1>
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<img src="simulator.gif" alt="Simulator Logo"/>
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</div>
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<h2>Available Simulations</h2>
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<p>
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The following protocol simulations were developed mainly by Iain Robin and
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<a href="http://www.cs.stir.ac.uk/~kjt/" target="_blank">Ken Turner</a>,
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with contributions from Paul Johnson and Kenneth Whyte. They should be
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useful in allowing you to experiment with a variety of protocols. Bug
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reports should be sent to Ken Turner.
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</p>
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<p>
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The simulations are listed in increasing order of complexity. It is
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suggested that you try the easier protocols first.
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</p>
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<blockquote>
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<img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="ABP.html">Alternating Bit Protocol (ABP) Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="UDP.html">User Datagram Protocol (UDP) Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="BOOTP.html">Boot Protocol (BOOTP) Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="HTTP.html">HyperText Transfer Protocol (HTTP) Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="SMTP.html">Simple Mail Transfer Transfer Protocol (SMTP)
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Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="IP.html">Internet Protocol (IP) Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="SWP3.html">Sliding Window Protocol (SWP) 3-Column Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="SWP5.html">Sliding Window Protocol (SWP) 5-Column Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="ABRA.html">Abracadabra Protocol Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="TFTP.html">Trivial File Transfer Protocol (TFTP) Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="TCPcs.html">Transmission Control Protocol (TCP) Client-Server
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Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="TCPpp.html">Transmission Control Protocol (TCP) Peer-Peer
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Simulator</a>
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</blockquote>
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<h2>Additional Simulations</h2>
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<p>
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The following protocol simulations were developed by <a
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href="http://www.cs.stir.ac.uk/~kjt/" target="_blank">Ken Turner</a> for
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Pearson Education. Bug reports should be sent to Ken Turner.
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</p>
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<p>
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The simulations are listed in increasing order of complexity. It is
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suggested that you try the easier protocols first.
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</p>
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<blockquote>
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<img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="STACK.html">Protocol Stack (STACK) Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="MUX.html">Multiplexing (MUX) Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="MCAST.html">Multicasting (MCAST) Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="CSMA.html">Carrier Sense Multiple Access with Collision Detection
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(CSMA/CD, Ethernet) Simulator</a>
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<br/><img src="dot-orange.gif" alt="Orange Dot"/>
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<a href="TCPss.html">Transmission Control Protocol (TCP) Slow Start
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Simulator</a>
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</blockquote>
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<h2>General Instructions</h2>
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<p>
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Select an action by clicking on the list at the bottom of the diagram.
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Actions are things like a user sending a data message or the medium
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delivering a protocol message. You are completely in control of the
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simulation. For example you may have to decide when to send messages,
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whether to acknowledge messages, and whether messages are lost in the medium
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or are delivered. Since the simulation does not run in real-time, a timeout
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is possible as soon as a message has been sent.
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</p>
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<p>
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The last action in the diagram is shown in red. If you make a mistake, or
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just want to backtrack in the simulation, then click <em>Undo</em>. You can
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undo as many steps as you like, right up to the beginning of the simulation.
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Clicking on <em>Redo</em> will perform the last undone step again.
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<em>Clear</em> will restart the simulation with the current protocol
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parameters. If you click on <em>Run</em> the simulator will run
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automatically, making random choices for you. If you are not sure what to
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experiment with, this is an easy way of seeing the protocol in action. While
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this is happening, the <em>Run</em> button changes to
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<em>Stop</em>. Click on <em>Stop</em> to return the simulator to user
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control. You can continue at this point as if you had made all the automatic
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choices yourself.
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</p>
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<p>
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The <em>Print</em>, <em>Load</em> and <em>Save</em> buttons are disabled
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since these simulations are running as applets. If you wish hard copy of the
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simulation, position the scroll bar in the simulation pane at an interesting
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point and print out the whole web page. If you have the code for the
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simulator, you can run it as an application to enable these buttons.
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<em>Print</em> produces a hard copy of the current simulation scenario.
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<em>Load</em> loads a scenario file (with a name ending in
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<em>.scn</em>). This must be for the same protocol as you are currently
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simulating. It replaces the current simulation scenario (if any).
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<em>Save</em> saves the current simulation scenario as a scenario file
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(with a name ending in <em>.scn</em>). If you are adventurous, you can
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create and edit your own scenarios using a standard text editor.
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</p>
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<h2>Protocol Descriptions</h2>
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<p>
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The available simulations vary quite widely, though they all behave in a
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similar way. The terminology used to describe each protocol is that of its
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standard. The term "octet" is commonly used in international communications
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standards to mean eight bits, i.e. a byte.
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</p>
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<p>
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Some simulations have associated protocol parameters. To change the defaults
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that are shown, enter new values and click <em>Change Values</em>. In some
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cases, this will force the simulation to restart.
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</p>
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</body>
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</html>
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