title: where is class E ip addresses?
body: <p>I am reading Richard Stevens' TCP/IP illustrated Vol1.He said class E ip addresses are reserved for future use.Considering he wrote the book at 1994,now is the future.So where is the class E ip addresses?</p>
  
  <p>I tried to ping 240.0.0.3 but windows returns</p>
  
  <blockquote>
    <p>Destination specified is invalid</p>
  </blockquote>
  
  <p>thanks.</p>