Submission guidelines: • Deadline for submission on Moodle is by 5pm Friday 25 September 2020. • You must submit a word document that provides answers to the questions given below. Your answers must...

Submission guidelines: • Deadline for submission on Moodle is by 5pm Friday 25 September 2020. • You must submit a word document that provides answers to the questions given below. Your answers must be concise and brief. • You can use online material present on the Internet in relevant research articles/books, however, you have to cite them in proper APA or Harvard format. • Remember not to copy/paste anything directly from above mentioned resources, you should provide answer to the questions in your own words. • Avoid any sort of plagiarism (Do not copy anything from your class fellows). • This tutorial carries 7.5% weightage. 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. 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. (4 marks) BISY2002 Information Systems Networking Essentials II. Write Subnet Mask, Network ID, Broadcast ID and host address range for Router B Subnet. You must clearly explain all the steps involved otherwise no marks will be given. (4 marks) Question 3: What is a Distributed Denial of Service attack (DDoS)? Briefly explain the UDP Flood DDoS attack (1+2 = 3 marks)