title: What are the advantages and disadvantages of using a content delivery network (CDN)?
body: <p>I was going through <a href="http://developer.yahoo.com/performance/rules.html" rel="noreferrer">Best Practices for Speeding Up Your Web Site from developer site of Yahoo...</a></p>
  
  <ul>
  <li><p>What are the advantages and disadvantages of using a <a href="http://en.wikipedia.org/wiki/Content_delivery_network" rel="noreferrer">content delivery network</a> (CDN)?</p></li>
  <li><p>When to use a CDN?</p></li>
  <li><p>Is a CDN a performance booster?</p></li>
  </ul>