COIT20261 Network Routing And Switching

COIT20261 Network Routing and Switching (Term 3, 2018) Assignment Item —Written Assessment-1 Central Queensland University

Objectives

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 up to Week 6.

The questions are designed to 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.

Where instructed, 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). Do not submit PDF’s or any other type of file without express permission from the Unit Coordinator.

Plagiarism Procedures can be found in the CQUniversity Policies section of the Unit Profile.

Assessment Requirements and Marking Criteria

There are 3 main questions with some sub-questions and the requirements are stated for each one. You must answer all questions and 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.

Question 1 – Address usage (3 marks)

Consider the following classless address in a given block:

156.120.32.3/26

Calculate the following:

1. the network address,
2. the direct broadcast address, and
3. the range of addresses available for hosts

Show the steps you took to arrive at your answers.

Question 2– Allocating subnets from a block (8 marks)

A company has been granted a block of addresses which includes the address 128.32.16.8/22. Answer the following questions, showing your calculations.

1. Calculate the network address of this block, and total addresses the block contains including special addresses this block can provide. (1 mark)
2. Create the following 4 subnets for this company by calculating the subnet address for each subnet. Answer this question by filling in the table in the Answer template. Your subnets must use contiguous address blocks, i.e., do not leave unallocated addresses in between two consecutive subnets. Use CIDR format for the mask. (6 marks)
   1. 1 subnet with 128 addresses (1.5 mark)
   2. 1 subnet with 64 addresses (1.5 mark)
   3. 2 subnets with 32 addresses each (1.5*2=3 marks)
3. After allocating the subnets, how many addresses are unallocated (leftover)? Show your calculations. (1 mark)

Question 3 – Network Tools (Windows) (4 marks)

This part of the assignment requires you to explore some common networking tools, and answer the given questions. netstat and tracert are included in Windows, while Wireshark is free to download and install. Explore these tools, then answer the questions.

1. A Wireshark scan has produced a packet capture, saved to a file named pcap and available on the Unit website. Download the file and open it in Wireshark, then answer these questions about the scan:
   1. View Frame 98, and answer the following questions: What kind of message is the frame carrying (protocol name/type). What is the destination host’s domain name? (1 mark)
   2. View Frame 644, and answer the following questions: Which transport layer protocol was used? Scan a few more frames down: what general activity was the user most likely engaged in? – give reasons (1 mark)
2. A ‘NETSTAT –aon’ command has given the output as shown below. Focussing on line 2 and 8 (highlighted), determine and write down the name or type of the application that is running over these two connections. What are the major differences between these two TCP connections or applications? (1 mark)
   

   Active Connections 
           Proto   Local Address          Foreign Address           State          PID  1TCP    138.77.212.196:8457    40.100.145.146:443     ESTABLISHED     8044  2TCP    138.77.212.196:8479    172.217.25.37:443       ESTABLISHED     10708  3 TCP    138.77.212.196:8560    40.100.146.178:443     ESTABLISHED     8044  4TCP    138.77.212.196:8573    138.77.208.123:61158  ESTABLISHED     2464  5 TCP    138.77.212.196:8574    138.77.208.123:61158   ESTABLISHED     2464  6TCP    138.77.212.196:8588    54.70.116.101:443      TIME_WAIT          0  7 TCP    138.77.212.196:8598    23.101.222.246:443     ESTABLISHED     15988  8 TCP    138.77.212.196:8605    138.77.0.41:80         ESTABLISHED     7460

3. Do a TRACERT on your computer to www.bom.gov.au. Paste the output of your tracert command to your assignment answer template and discuss the output in sufficient details to demonstrate your understanding of the information being displayed by the tracert command. In your discussion, you must include specific information displayed on the output, e.g., host address, etc., that you have pasted in the assignment. (1 mark)