title: How to Calculate One-way Packet Delay without using NTP, PTP
body: <p>I am looking for the way to calculate the one-way delay in a packet-switched network. I do not want to use NTP or PTP (Network Time Protocol, Precision Time Protocol).</p>
  
  <p>Consider the scenario:</p>
  
  <p>Host-1 Sends the packet to Host-2. Both Hosts have different Clock rates and the hosts are located in different countries.</p>
  
  <p>Packet may be UDP/TCP/Layer 2 Frame.</p>
  
  <p>Is there any way to sync the clock rates of two hosts so as to calculate the one-way delay.</p>
  
  <p>Now how do you guys calculate the one way delay without relying on a timing protocol. I am looking some generic formula to do this.</p>
  
  <p>I would much appreciate the answers for this question.</p>
  
  <p>Thanks a ton in advance.</p>