80 lines
4.5 KiB
HTML
80 lines
4.5 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Long description of Figure 1: Commtrace model (rzahh587.gif)" />
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<title>Long description of Figure 1: Commtrace model (rzahh587.gif)</title>
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</head>
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<body id="rzahh587"><a name="rzahh587"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Long description of Figure 1: Commtrace model (rzahh587.gif)</h1>
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<div><div class="section"><p><strong>found in IBM<sup>®</sup> Toolbox for Java™: Commtrace classes</strong></p>
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<p>This figure
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illustrates in a general way how the commtrace classes correspond to a communications
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trace file.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Description</h4><p>The figure is composed of the following:</p>
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<ul><li>A square image in the right background labeled 'Prolog,'. This square
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is divided into rows that represents a section of a communications trace for
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a LAN line description. Written vertically on the left side of the image is
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the word 'Frames'</li>
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<li>An image in the left foreground of a horizontal rectangle. This rectangle
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is connected to the main square in the background by lines on each side. The
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rectangle represents a frame in the trace file and is divided into 3 sections:<ul><li>A green section labeled 24-bytes that represents thesection of data that
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contains general information about the contents of the frame.</li>
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<li>A light blue section labeled LanHeader that indicates the section of data
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that contains general information about the IPacket that follows..</li>
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<li>A tan section labeled IPPacket that indicates the section of data composed
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of one or more headers and the associated data.</li>
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</ul>
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</li>
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<li>Another horizontal rectangle is below the first. A line on each side of
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the rectangle connects it to the IPPacket. The rectangle represents a detailed
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version of the IPPacket section and consists of 2 sections:<ul><li>A light blue section labeled Header that indicates the section of data
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at the beginning of an IPPacket </li>
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<li>A dark blue section labeled Data that indicates the packet data and points
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to the next header.</li>
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</ul>
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</li>
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<li>A third horizontal rectangle appears below the dark blue Data section.
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A line on each side of the rectangle connects it to the Data section. The
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rectangle represents the 2 sections of the IPPacket and states 'IPPacket information
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encapsulates a chain of other headers and associated data':</li>
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<li><ul><li>A light blue section labeled Header that indicates the section of data
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at the beginning of an IPPacket </li>
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<li>A dark blue section labeled Data that indicates the packet data and points
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to the next header.</li>
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</ul>
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</li>
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</ul>
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<p>A frame (first horizontal rectangle) in a trace file (background image)
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contains 2 sections of data, the 24-byte section (green) of data and the LanHeader
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(light blue), along with the packet (tan). </p>
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<p>The IPPacket (second horizontal
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rectangle) processed in the frame consists of the Header (light blue) and
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Data (dark blue) which in turn point to another header and data (third horizontal
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rectangle). The second and third rectangles are joined by connecting lines
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on each side from the Data section and back to the IPPacket which shows the
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continuous chain for headers and associated data in a communications trace.</p>
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</div>
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</div>
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</body>
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</html> |