title: The realationship between window size and sequence number
body: <p>The question is :</p>
  
  <p>We have a transport protocoll that uses pipelining and use a 8-bit long sequence number (0 to 255)</p>
  
  <p>What is the maximum window size sender can use ? (How many packets the sender can send out on the net before it muse wait for an ACK?)</p>
  
  <p>Go-Back-N the maximum window size is: w= 2^m -1 w=255.</p>
  
  <p>Selective Repeat the maximu window size is: w=(2^m)/2 w=128. </p>
  
  <p>I do not know which is correct and which formula shall I use.</p>
  
  <p>Thanks for help</p>