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. BISY2002 Information Systems Networking Essentials 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) Question 2: Answer the questions regarding the given topology. Router A and Router B have 50 PCs and 20 PCs connected to them, respectively. The IP address space given to you is 192.168.10.0/25. (8 marks) I. Write Subnet Mask, Network ID, Broadcast ID and host address range for Router A Subnet. You must clearly explain all the steps involved otherwise no marks will be given.
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