Due date: 11:45pm AEST, Friday, Week 10 ASSESSMENT
Weighting: 40% 1
This assessment task requires you to demonstrate your knowledge of basic routing concepts by completing a number of exercise questions. The questions contain numerical as well as descriptive questions covering the material from Weeks 1 to 9. Question #4 may require further research.
Completing these questions should help you to achieve the unit learning outcomes as listed in the unit profile.
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 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 Criteria
There 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.
Question 1 – Routing table construction (10 marks)
Given the following network, construct the routing table in longest mask order for routers R2 and R3.
Question 2– Allocating subnets from a block (6 marks)
An ISP grants to a client a block of addresses starting with the address 126.96.36.199/23.
a) Calculate the total number of addresses available in this block including all the special addresses. 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’s
Subnet-2 – needs a minimum of 60 host ID’s
Subnet-3 – needs a minimum of 100 host ID’s
Reserved subnet block – a minimum of 200 host ID’s
Create 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. Show 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, which determines 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.
Question 5 (5 marks)
Answer the following questions which are about IPv6 address formatting.
a) Give the fully expanded address of the abbreviated IPv6 address FCAB::CF:AFFF (1 mark)
b) What is the type of block of the abbreviated IPv6 address
4001:A100:FC1::AE12:5329:FBCA? (1.5 marks)
c) Consider this IPv6 address: 0::188.8.131.52 What type of block address is this, and when is this type used? (2.5 marks)
TEMPLATE FOR YOUR ANSWERS
Type your answers in this section in the spaces provided
First Name:_________________________ Last Name:____________________________
Student ID: __________________________
Question Number Mark
allocated Mark earned
Question 1: (10 marks)
Routing table of router R2:
Prefix Network address Next-hop address Interface
Routing table of router R3:
Prefix Network address Next-hop address Interface
10 (5 for each table)
Question 2: (6 marks)
b) Department Subnet address Last address Mask
No addresses left over earns 1 mark
Question 3: (4 mark)
Question 4: (15 marks)
Penalties apply for excessive copying from the textbook or other sources, or for failure to use proper citation/referencing conventions
Question 5: (5 marks)
Total marks awarded 40 (max)
Less late penalties if applicable
Less plagiarism penalties if applicable
Total marks earned