Question 1: Host A with IP address 90.100.100.100 and MAC address AB:AB:AB:AB:AB:AB sends a packet to a Host B located in the internet. The IP address and MAC address of Host B are 10.10.10.8 and CC:CC:CC:CC:CC:CC, respectively. The default gateway of host A is router R1 which is further connected to the router of the ISP (R_ISP). Note that R1 has one interface connected to Host A and another interface connected to R_ISP. The IP addresses and MAC addresses of all interfaces of R1 and R_ISP are shown in the figure below. IP Address: 100.10.10.1 MAC Address: BC:BC:BC:BC:BC:8C IP Address: 100.10.10.2 MAC Address: BB:BB:BB:BB:BB:BB R_ISP R1 Internet IP Address: 90.100.100.1 MAC Address: AA:AA:AA:AA:AA: AA Host B Host A IP Address: 90.100.100.100 MAC Address: AB:AB:AB:AB:AB:AB IP Address: 10.10.10.8 MAC Address: CCCCCCCCCCCC Answer the following questions (4 marks) a) In order to communicate with Host B, Host A sends a packet to R1. What are the source and destination IP addresses, and source and destination MAC addresses in the packet transmitted by the Host A to R1? (0.5*4 = 2 marks) b) The packet above (in part a) now traverses from R1 to R_ISP. What are the source and destination IP addresses, and source and destination MAC addresses now? (0.5*4 = 2 marks)