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Typology: Exercises
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Due date: 11:45pm AEST, Friday, Week 10
Weighting: 40%
Objectives This assessment task requires you to demonstrate your knowledge of basic routing concepts by completing a number of exercise questions. The questions contain various numerical as well as descriptive questions covering the material from Weeks 1 to 9. Question #4 requires you to research further and then demonstrate knowledge of advanced concepts. Completing these questions should help you to achieve the unit learning outcomes as listed in the unit profile. Instructions You 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 template 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 Criteria There are 4 main questions with some sub-questions and the requirements are stated for each one. You must answer all 4 questions and their sub-questions. Marks are indicated in the Answer Template. The questions will be marked on correctness, clarity, and addressing all parts of the question. The Assignment Questions begin on the next page.
Question 1 – Routing table construction (10 marks) Given the following network, construct the routing table for routers R2 and R3. Question 2– Allocating subnets from a block (6 marks) You are the Network Administrator for a startup company that has been granted a new block of addresses starting with the address 139.145.56.0/. a) Calculate the total number of addresses available in this block including all the special addresses. Show your calculation (1 mark) b) As Network Administrator, you need to distribute the available addresses on a departmental needs basis (meaning not allocating more than you have to), with 4 new subnets determined as follows: Marketing needs 65 addresses Accounting needs 100 addresses Head Office needs 33 addresses and, Customer Services needs 13 addresses.
c) Briefly summarize in your own words the problems with current routing methods that the authors have identified. (5 marks) d) Contrast and compare the concepts of embedded routing and extensible routing. (2. marks) e) How does the proposal of Routing As A Service (RAAS or just RAS) address the problems with current routing methods? (2.5 marks) Referencing : List all references and use proper in-text citation using the Harvard referencing convention. Remember that diagrams also need to be cited. Marks will be deducted on a per-question basis for not adhering to referencing standards. The two articles for questions 3 – 5 (both articles have the same title): Routing as a Service by K.Lakshminarayanan et al http://www.eecs.berkeley.edu/Pubs/TechRpts/2006/EECS-2006-19.pdf Routing as a Service by K.Lakshminarayanan, Stoica, and Shenker https://www.cs.princeton.edu/~jrex/teaching/spring2005/reading/ras04.pdf Question 5 starts on the next page.
Question 5 – IPv6 Packets (5 marks) An IPv6 packet travelling within an Autonomous System, consists of a base header, extension headers, a TCP segment and data. The data is 128,000 bytes long (jumbo payload). The following diagram shows the packet: Version Traffic class Flow label Payload length Next header Hop limit Source Address Destination Address Hop-by-hop ext hdr Source port address Destination port address Sequence number Acknowledgement number HLEN Reserved Control Window size Checksum Urgent pointer 128000 bytes of data Determine a correct or valid value for the following fields in the base header with a brief explanation of the value you selected. Note: the brief explanation is half the marks. Version; Payload Length; Next Header; Hop limit: Source Address and Destination Address. Do not type your answers here: type it in the Answers Template provided. Suggested sources of information: Forouzan (textbook) chapter 27 http://ptgmedia.pearsoncmg.com/imprint_downloads/cisco/promotions/clnwebinars/ 9781587143137_ch02.pdf http://www.cu.ipv6tf.org/literatura/chap3.pdf
b) (^) Department Subnet address Last address Mask Marketing Accounting Head Office Cust Services
c) 1
a) 2. b) 1 c).
a) 2 b) Major routing protocols etc (1.5 marks) Why inter-domain/intra-domain protocols etc (1.5 marks)
c) 5 d) 2. e) 2.
Place a value, with brief explanation, for (read question 5): Version: Payload length: Next header: Hop limit: Source Address: Destination Address: Note: source & destination address are worth 1 mark together 5 (for each value,. for valid value,. for explanati on.