 list until the desired environment ID is
found.  Broadcast communication is implemented by looping through the
linked list and sending to each member found.  Since each port
communicates with only a single other environment, receipt of a message
on a particular port precisely identifies the sender.</p>
      <p>This is implemented in the quote_send, quote_send_broadcast and
quote_send_one functions, which can be found in
<code class="filename">ex_rep/base/rep_net.c</code>.</p>
      <p>The example provided