title: What is the port of WebSocket?
body: <ol>
  <li><p>What is the port of WebSocket?</p>
  </li>
  <li><p>What protocol does WebSocket use?</p>
  </li>
  <li><p>Does WebSocket work when the firewall blocks all but 80 and 443 ports?</p>
  </li>
  </ol>