title: Google Chrome Network Size explain
body: <p>I am bit confused by the network status from Google Chrome developer panel.</p>
  
  <p><img src="https://i.stack.imgur.com/wDKxg.png" alt="enter image description here"></p>
  
  <p><strong>39.3KB</strong> is the file size
  what's this <strong>2.9KB</strong>?</p>
  
  <p>anyone can explain?</p>
  
  <p>Cheers</p>