LINK LAYER (AND NETWORK LAYER) ADDRESSING AND FORWARDING Consider the figure below. The IP and MAC addresses are shown for nodes A, B, C and D, as well as for the router's interfaces. 45-B4-07-F4-15 A3 128.119.105.27 3B-25-E8-50-95-51 128.119.106.139 35-82-5A 55-63-7D 128.119.228.193 B (6) 60 A2-74 40-34-22 128.119.222.195 (3) (1) (2) (5) A D B8-0C-FF-4D EC-C8 128.119.228.171 A3-95-80 56 OF-39 128.119,228,166 B3-1F-B4-6D DD B8 128.119.222.173 Consider an IP datagram being sent from node D to node B 1. What is the source mac address at point 5? Use the Mac address format above example 11-11-11-11-11-11 2. What is the destination mac address at point 5? 3. What is the source IP address at point 5? Use the IP address format in the diagram 4. What is the destination IP address at point 5? 5. Do the source and destination mac addresses change at point 4? Answer with yes or no. 6. Do the source and destination mac addresses change at point 3? Answer with yes or no. 7. What is the source mac address at point 3? 8. What is the destination mac address at point 3