//QoS
document.writeln('<DIV> 	<dd>An acronym for <b>Q</b>uality <b>O</b>f <b>S</b>ervice. The ability to   maintain a constant <a href="../d/default.asp?name=data_transfer_rate"> data throughput</a> in a <a href="../n/default.asp?name=network">network</a>. QoS is essential for   realtime audio and video transmission over the network.   <a href="../a/default.asp?name=atm">ATM</a>   network technology is designed to guarantee QoS.  </dd> </DIV>');