COIT20261 Network Routing and Switching (Term 2, 2018).
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.
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.
b) Create the following 6 subnets for this company by calculating the subnet address for each subnet. Answer this question by filling in the table in the Answer template. Use CIDR format for the mask.
Often the best way to gain an initial familiarity with network tools is to simply use them, at a basic level in exploratory mode as suggested in some of the tutorial exercises. Netstat and Tracert are included in Windows, while Wireshark is free to download and install. Explore Wireshark, Netstat and Tracert, then complete this question.
a) A wireshark scan has produced a packet capture, saved to a file named wireshark_capture01.pcapng and available on the Unit website. Download the file and open it in Wireshark, then answer these questions about the scan:
i. View Frame 2: On which interface was this packet captured? what transport layer protocol was used? What kind of message was being transmitted at that point? (1 mark)
ii. View Frame 10: What 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)
b) A ‘NETSTAT –aon’ command has given the output shown below. Focussing on line 4 (highlighted), what type of application is sending messages on this connection, and is it over a secure connection or not a secure connection? – give reasons (1 mark)
Proto Local Address Foreign Address State PID
1 TCP 10.0.0.58:139 0.0.0.0:0 LISTENING
2 TCP 10.0.0.58:5040 0.0.0.0:0 LISTENING 7480
3 TCP 10.0.0.118:139 0.0.0.0:0 LISTENING 4
4 TCP 10.0.0.118:52450 18.104.22.168:443 ESTABLISHED 14080
5 TCP 10.0.0.118:52458 22.214.171.124:443 CLOSE_WAIT 8912
6 TCP 10.0.0.118:52791 126.96.36.199:443 ESTABLISHED 22400
7 TCP 10.0.0.118:52811 188.8.131.52:443 ESTABLISHED 4696
8 TCP 10.0.0.118:52820 184.108.40.206:443 CLOSE_WAIT 4696
9 TCP 10.0.0.118:52879 220.127.116.11:443 ESTABLISHED 4696
c) Do a TRACERT on your computer to www.facebook.com. Paste the output to your assignment answer template and discuss the output in sufficient detail to demonstrate that you understand the information being displayed (1 mark)