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<p>and <a href="page.php?w=Free-space_optical_communication">free space</a>. In the <a href="page.php?w=OSI_model">OSI model</a>, the software to handle the media is defined at layers 1 and 2 -- the physical layer and the data link layer. Common examples of networking technologies include:</p>

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* <a href="page.php?w=Ethernet">Ethernet</a> is a widely adopted family of networking technologies that use copper and fiber media in <a href="page.php?w=local_area_network">local area networks</a> (LAN). The media and protocol standards that enable communication</p><p>
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