Link Layer $($and network layer$)$ addressing and forwarding $-2.$ Consider again the figure above. The IP and MAC addresses are shown for nodes A$,$ B$,$ C and D$,$ as well as for the router's interfaces. Now suppose that the router in the above diagram is replaced by a switch. Consider again an IP datagram being sent from node D to node A$.$ Give again the source and destination Ethernet addresses, as well as the source and destination addresses of the IP datagram encapsulated within the Ethernet frame at points $(5),(4),(2),$ and

$(1)$ in the figure above for the case that the router has been replaced by a Ethernet switch.Consider an IP datagram being sent from node $D$ to node $A.$ Give the source and destination

Ethernet addresses, as well as the source and destination addresses of the IP datagram

encapsulated within the Ethernet frame at points $(5),(4),(2),$ and $(1)$ in the figure above.