title: How to access the subdomain of an IP address in the browser?
body: <p>To get to the IP address of an example website, you just visit</p>
  
  <pre><code>subdomain.example.com
  </code></pre>
  
  <p>However, if I try to visit</p>
  
  <pre><code>subdomain.2.1.33.111 (example ip)
  </code></pre>
  
  <p>Firefox returns an error.<br>
  Why?</p>