<HEAD> <TITLE>"What is QoS?"</Title> </HEAD> <BODY> <A NAME="pgtop"></A> <A HREF="index2.htm"><Img Src="fllarrow.gif"></A> <A HREF="index4.htm"><Img Src="flrarrow.gif"></A> <A HREF="mailto:guerin@ee.upenn.edu"><Img Src="flmlsend.gif"></A> <BR> <IMG BORDER=0 SRC="index3.gif" > <HR> <A NAME="pgbot"></A> <BR> <ADDRESS>Roch Guerin <A HREF="mailto:guerin@ee.upenn.edu">guerin@ee.upenn.edu</A></ADDRESS> <FONT SIZE="-2">Published by Lotus® Freelance Graphics® </BODY>