Assume Go-Back-N is used. Assume rwnd = 6. Assume among the first 5 packets that are sent by the sender, the 4th packet is lost and is not received by the receiver. Assume that sender always has packets to send.

Draw the diagram that shows how the lost packet is retransmitted. Make your own assumption of a proper time-out period; clearly mark each transmitted packet between the hosts:

Sender Receiver | | | | | | | | | |