Consider a scenario in which Host A wants to simultaneously send packets to Hosts B, C, and D. A is connected to B, C, and D via a broadcast channela packet sent by A is carried by the channel to B, C, D. Suppose that the broadcast channel connecting A, B, C, and D can independently lose and corrupt packets (and so, for example, a packet sent from A might be correctly received by B and C, but not by D). Design a stop-and-wait for reliably transferring packets from A to B, C, and D, such that A will not send new packet until it knows that B, C and D have all correctly received the current packet. Give FSM descriptions of A and B. (Hint: The FSM for C and D should be essentially the same as for B.)

There is a similar question asked by someone else with A, B and C three hosts. There is a D for this quesiton.