Problem 1 - Consider a switch S with four hosts A, B, C, D attached to it. A is attached to port 0, B to port 1, C to port 2, and D to port 3. The switch has just been turned on, so its forwarding table is empty. The switch now sees now sees the following traffic in the given order: Frame from A to C Frame from C to A. . Frame from B to A. . Frame from B to D Frame from A to B. Show the forwarding table of the switch immediately after each frame is seen, and indicate if the frame is flooded (sent out on all ports except the port of arrival) or unicast (sent out over just one port)