In the Go - Back-N error control technique, if the transmitter receives an ACK:RR4, what does this mean for transmitter and receiver? List and briefly define three versions of ARQ In Figure 1 frames are generated at node A and sent to node C through node B. Determine the minimum date rate required between nodes B and C so that the buffers of node B are not flooded, based on the following: The data rate between A and B is 50 kbps. The propagation delay is 5 mu s/km for both lines There are no errors