title: Amazon EC2 metered bandwidth. IP or TCP level?
body: <p>Assuming I have a long lasting persistent TCP connection from my EC2 instance to a client and I send a single byte every 30 seconds (app level keep-alive). </p>
  
  <p>Is that counted as 1 byte traffic, or are TCP headers or even Ethernet overhead counted in as well (which would significantly change the equation)?</p>