94 lines
3.0 KiB
HTML
Executable File
94 lines
3.0 KiB
HTML
Executable File
<!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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<!-- BOOTP.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>Boot Protocol</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>Boot Protocol Simulator</h1>
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<img src="simulator.gif" alt="Simulator Logo"/>
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</div>
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<h2>Protocol Description</h2>
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<p>
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BOOTP (Boot Protocol) is a simple connection-less protocol, typically
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used by a discless workstation to discover its Internet address and/or
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the name of its bootstrap file. BOOTP operates over <a
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href="UDP.html">UDP (User Datagram Protocol)</a>. BOOTP simply discovers
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the parameters needed for the bootstrap procedure. Typically, <a
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href="TFTP.html">TFTP (Trivial File Transfer Protocol)</a> is used to
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download the bootstrap file itself.
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</p>
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<p>
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A boot client supplies a transaction identifier and its hardware address.
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The client may optionally supply its network address; the server will
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allocate a unique network address if required. The client may optionally
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supply the name of the boot file; the server will supply the full path
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name if this file is given, or will determine the boot file the client
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needs. Addresses and the boot file are given symbolic names in the
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simulation.
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</p>
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<h2>Protocol Parameters</h2>
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<p>
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This simulation has no parameters.
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</p>
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<h2>Protocol Simulation</h2>
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<p>
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The protocol simulation shows a time-sequence diagram with client and
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server protocol entities, and a communications medium that carries
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messages. The client sends a <em>REQUEST</em> message containing an
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(arbitrary) transaction identifier and its hardware address
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(<em>hw</em>). The client may optionally supply its network address if it
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knows it (e.g. <em>net.43</em> for some subnetwork <em>net</em>). The
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client may additionally ask for the location of a particular bootstrap
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file (<em>boot</em>). The server reply starts with the original
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parameters. A network address is allocated to the client if it did not
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know it. The full filestore path to a boot file is returned if the client
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did not know which file to use. If the client named a boot file, the full
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path to this is returned. If a <em>REQUEST</em> or <em>REPLY</em> message
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is lost, the client must time out and send it again.
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</p>
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<center>
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<applet code="simulator.ProtocolSimulator.class"
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archive="ProtocolSimulator.jar" width="750" height="700"
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name="ProtocolSimulator">
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<param name="protocol" value="BOOTP"/>
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</applet>
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</center>
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<hr/>
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<p>
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<a href="index.html"><img src="uparrow.gif" alt="Up Arrow"/></a>
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Up one level to <a href="index.html">Protocol Simulators</a>
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</p>
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</body>
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</html>
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