title: Confusion about Go back N ARQ
body: <p><a href="https://stackoverflow.com/questions/28444055/go-back-n-window-size">Go-Back-N window size</a></p>
  
  <p>In the second image on the above Page's answer, what will happen after all the three ACKs have been lost? Won't the system get stuck? Sender will keep sending frames 0,1,2 but since the receiver expects frame 3, it will not send an ACK. It will be silent forever, and the sender will keep sending frames 0,1,2 forever, after timeouts. Please explain.</p>