title: why does an HTTP request request is sent after the first ack packet?
body: <p>I an simulating http client traffic with RAW socket.
  I send a SYN packet then get the SYN-ACK from the server. 
  Finally I send an ACK+request packet and waits for the response.
  I noticed that when using wget or curl,
  the first ACK and the request are sent in two different packets.
  why is that, and is that relevant to anything?</p>