title: What is the difference between no-cache and no-store in Cache-control?
body: <p>I don't find get the practical difference between <code>Cache-Control:no-store</code> and <code>Cache-Control:no-cache</code>.</p>
  
  <p>As far as I know, <code>no-store</code> means that no cache device is allowed to cache that response. In the other hand, <code>no-cache</code> means that no cache device is allowed to serve a cached response without validate it first with the source. But what is that validation about? Conditional get?</p>
  
  <p>What if a response has <code>no-cache</code>, but it has no <code>Last-Modified</code> or <code>ETag</code>?</p>
  
  <p>Regards.</p>