hs 
</li>
</ul>
</li>
<li>DNS: 
<ul class="org-ul">
<li>Transformations for label compression
</li>
<li>Count fields in the packet header 
</li>
</ul>
</li>
<li>ZIP:
<ul class="org-ul">
<li>Multiple structures referred to by offset and size
</li>
<li>Compression
</li>
<li>Checksums
</li>
</ul>
</li>
</ul>
</section>
<section id="sec-9-2" >

<h3>Programmer effort</h3>
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