Suppose that the channel connecting the sender and receiver can corrupt but not lose or reorder packets. Now consider the figure below, which shows four data packets and three corresponding ACKs being exchanged between an rdt 2.2 sender and receiver. The actual corruption or successful transmission/reception of a packet is indicated by the corrupt and OK labels, respectively, shown above the packets in the figure below.

1 - At time t=0, what is the sender state? 2 - At time t=0, what is the receiver state? 3 - At time t=0, what is the sequence/ack # of the packet? 4 - At time t=1, what is the sender state? 5 - At time t=1, what is the receiver state? 6 - At time t=1, what is the sequence/ack # of the packet? 7 - At time t=2, what is the sender state? 8 - At time t=2, what is the receiver state? 9 - At time t=2, what is the sequence/ack # of the packet? 10 - At time t=3, what is the sender state? 11 - At time t=3, what is the receiver state? 12 - At time t=3, what is the sequence/ack # of the packet? 13 - How many times is the payload of the received packet passed up to the higher layer?

R E L I A B L E D A A T RA NS F E R.R D T 2.2 (SE N D E R A N R EC E I V E R A T IO NS) Consider the rdt2.2 protocol from the text (pages 209-212). The FSMs for the sender and receiver are shown below: Suppose that the channel connecting the sender and receiver can corrupt but not lose or reorder packets. Now consider the figure below, which shows four data packets and three corresponding ACKs being exchanged between an rdt 2.2 sender and receiver. The actual corruption or successful transmission/reception of a packet is indicated by the corrupt and OK labels, respectively, shown above the packets in the figure below