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<p>or <a href="page.php?w=parallel_communication">parallel</a> communication; <a href="page.php?w=simplex_communication">simplex</a>, <a href="page.php?w=half_duplex">half duplex</a> or <a href="page.php?w=full_duplex">full duplex</a> transmission mode; and <a href="page.php?w=autonegotiation">autonegotiation</a></p>

<p><big> PHY </big></p>
<p>A <b>PHY</b>, an abbreviation for physical layer, is an <a href="page.php?w=electronic_circuit">electronic circuit</a>, usually implemented as an <a href="page.php?w=integrated_circuit">integrated circuit</a>, required</p><p>
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