title: Can HTTP/HTTPS use UDP?
body: <p>UDP is unreliable.</p>
  
  <ul>
  <li><p>No guarantee of message delivery</p></li>
  <li><p>No acknowledgments, retransmissions, or timeouts</p></li>
  <li><p>No guarantee of order of delivery</p></li>
  <li><p>No packet sequence numbers, no reordering, no head-of-line blocking</p></li>
  <li><p>No connection state tracking</p></li>
  <li><p>No connection establishment or teardown state machines</p></li>
  <li><p>No congestion control</p></li>
  <li><p>No built-in client or network feedback mechanisms</p></li>
  </ul>
  
  <p>As far as I know, HTTP/HTTPS uses TCP. </p>
  
  <p>Could HTTP/HTTPS connections also be established using UDP?</p>