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<p>area networks can be broken down into three areas: <a href="page.php?w=mathematical_model">mathematical model</a>s, <a href="page.php?w=network_emulation">network emulation</a>, and <a href="page.php?w=network_simulation">network simulation</a>. </p>

<p>Performance improvements are sometimes delivered via <a href="page.php?w=wide_area_file_services">wide area file services</a> or <a href="page.php?w=WAN_optimization">WAN optimization</a>.</p>

<p><big>Private networks</big></p>
<p>Of the approximately four billion addresses defined in IPv4, about 18</p><p>
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