COIT20261 Network Routing and Switching
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Added on 2020-04-01
COIT20261 Network Routing and Switching
Added on 2020-04-01
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COIT20261 Network Routing and Switching (Term 2, 2017)Assignment item —Written AssessmentDue date:11:45pm AEST, Friday, Week 10ASSESSMENTWeighting:40%1ObjectivesThis assessment task requires you to demonstrate your knowledge of basic routing concepts by completing a number of exercise questions. The questionscontain numerical as well as descriptive questions covering the material fromWeeks 1 to 9. Question #4 may require further research.Completing these questions should help you to achieve the unit learning outcomes as listed inthe unit profile.InstructionsYou must do this assignment on your own – it is not a group assignment.Type all your answers in the ‘Template for Your Answers’ Section of this document and upload only that template. You could do that by copying the Template section into a new Word document for uploading. Answers that are not typed into the “Template for Your Answers” section may not be marked, or may be returned to you for re-typing and re-submission – late penalties will apply.You must show the steps you took to arrive at your answers. Write your answers in your own words to avoid potential plagiarism and copyright violations. You must submit the Answer section as a Word file (.doc or .docx).Plagiarism Procedures can be found in the CQUniversity Policies section of the Unit Profile. Assessment Requirements and Marking CriteriaThere are 5 main questions with some sub-questions and the requirements are stated for each one. You must answer all 5 questions and their sub-questions. Marks are indicated in the Answer Template.The questions will be marked on correctness, logic and clarity, and addressing all parts of the question. The Assignment Questions begin on the next page.
COIT20261 Network Routing and Switching (Term 2, 2017)Assignment item —Written AssessmentQuestion 1 – Routing table construction(10 marks)Given the following network, construct the routing table in longest mask order for routers R2and R3. Question 2– Allocating subnets from a block (6 marks) An ISP grants to a client a block of addresses starting with the address 139.145.56.0/23. a)Calculate the total number of addresses available in this block including all the specialaddresses. Show your calculation (1 mark)b)The client decides to allocate the available addresses to 3 planned subnets according to current needs. The plan also called for reserving a subnet block of at least 200 host-ID’s for future needs, and to have no unallocated blocks left over at the end.Subnet-1 – needs a minimum of 25 host ID’sSubnet-2 – needs a minimum of 60 host ID’s Subnet-3 – needs a minimum of 100 host ID’sReserved subnet block – a minimum of 200 host ID’sCreate the required subnets, each should include all special addresses. For each subnet, list the subnet address, the last address, and the subnet prefix in CIDR format.
COIT20261 Network Routing and Switching (Term 2, 2017)Assignment item —Written AssessmentShow your calculations for all subnets, that is briefly showing how you arrived at the sub-block addresses. (4 marks or 1 mark for each correct subnet block plus 1 mark for achieving no unallocated addresses left over).Question 3 – Fragmentation(4 marks) An IP datagram 5,000 bytes long (including header with no options) arrives at a router, whichdetermines that the next destination has an MTU of 1,500 bytes. Answer the following questions, showing your calculations and reasoning.a)Assuming that the router decides to fragment the packet into 4 fragments, for each fragment, determine a correct size, and identify the starting byte and ending byte (2.5 marks).b)Calculate the fragmentation offset for each fragment (1 mark).c)The total number of bytes from all 4 fragments leaving the router should be greater than the initial datagram size that arrived. Explain why this is so (.5 mark).Question 4 – Focussed routing study – autonomous systems (15 marks)Research and review appropriate materials, including reputable online sources and the textbook, and answer the following questions. It is important to show your understanding by using your own words. Proper referencing will be expected.a)Discuss Autonomous Systems. What are they? Why do they exist? (5 marks)b)Discuss Inter-domain routing. Your discussion must include the major routing protocols associated with inter-domain routing. (2 marks)c)Discuss Intra-domain routing. Include in your discussion the major routing protocols associated with intra-domain routing. (2 marks)d)Explain the similarities and differences among the major routing protocols. (4 marks)e)Briefly explain why there are different protocols for inter-domain and intra-domain routing. (2 marks)General guidelines: Answer each question directly and briefly, yet clearly and accurately. Use your own expressions – do not copy whole sentences or paragraphs from other sources.Penalties apply for excessive copying from the textbook or other sources, or for failure to use proper citation/referencing conventions.
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