title: which is the difference between physical and default hostname?
body: <p>I saw that I can use different types of hostnames</p>
  
  <pre><code>&lt;hostname physical="true"&gt; technical_name  &lt;/hostname&gt;
  &lt;hostname default="true"&gt;  link  &lt;/hostname&gt;
  &lt;hostname&gt; name &lt;/host&gt;
  </code></pre>
  
  <p>can someone tell me which is the difference between these lines? and also what happens if I set physical or default hostname on false ?</p>