<p>An example should make the basic concept clear:</p>

<pre>
<tt>
raw packet:
  ___________________________________________
 |______________packet data__________________| 753 bytes

lacing values for page header segment table: 255,255,243
</tt>
</pre>

<p>We simply add the lacing values for the total size; the last lacing
value for a packet is always the value that is less than 255. Note
that this encoding both avoids imposing a maximum packet size as well
as imposing minimum overhead on small packets (as 