title: Using TCP Acks to measure latency to a server?
body: <p>I am trying to measure latency to a server that I don't control.  This is in a colocated environment, so the latency is on the order of 500 us (.5 ms).  </p>
  
  <p>I understand that Cisco gear frequently deprioritizes ICMP traffic, making ping times unreliable.  Is there a way for me to tell if this is the case on the gear I am traversing?</p>
  
  <p>Can I use TCP acknowledgements to determine the minimum latency to the remote server?  To do this, I would somehow need to force the remote server to send a TCP ack immediately on receiving my data.  </p>