COIT20261 Network Routing and Switching Assignment-1

This is an assessment task for COIT20261 Network Routing and Switching course. It covers basic routing concepts and contains exercise questions. The questions are designed to help students achieve the unit learning outcomes as listed in the unit profile. The assessment has 3 main questions with some sub-questions and the requirements are stated for each one. The questions will be marked on correctness, logic and clarity, and addressing all parts of the question.

COIT20261 Network Routing and Switching (Term 1, 2018)
Assignment item —Written Assessment-1
Due date:
11:45pm AEST, Friday, Week 6
ASSESSMEN
T
Weighting: 15% 1
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 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.
USE THE PROVIDED TEMPLATE ON P.4 FOR ALL YOUR ANSWERS.

COIT20261 Network Routing and Switching (Term 1, 2018)
Assignment item —Written Assessment-1
Question 1 – Address usage (3 marks)
Consider the following classless address block:
154.78.177.3/27
List the addresses from this block that would be used as:
a) the network address,
b) the direct broadcast address, and
c) the range available for hosts to use
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
138.77.216.5/24. Answer the following questions, showing your calculations.
a) Calculate the network address of this block and how many host addresses
including special addresses this block can provide (1 mark)
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.
I. 2 subnets with 32 addresses each (2 marks)
II. 4 subnets with 16 addresses each (4 marks)
c) After some time, the company decides that it wants another subnet with 1,024
addresses. Explain whether this can be allocated from the existing block.
(1 mark)
Question 3 – Network Tools (Windows) (4 marks)
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. Very briefly summarise in your own words the content in each of the three
horizontal display windows in Wireshark (.5 mark)
ii. In Frame 3, what brand of computer launched this scan and what was its IP
address? State where this information is found (.5 mark)
iii. Briefly explain the exchange event captured in frames 4 - 6 (.5 mark)

COIT20261 Network Routing and Switching (Term 1, 2018)
Assignment item —Written Assessment-1
iv. Describe in your own words two specific network problems that a network
administrator could use Wireshark for as a troubleshooting tool? (.5 mark)
b) A ‘NETSTAT –aon’ command has given the output below (excerpted). Briefly
describe each column heading, and the states LISTENING, ESTABLISHED and
CLOSE_WAIT. (1 mark)
Active Connections
Proto Local Address Foreign Address State PID
TCP 10.0.0.58:139 0.0.0.0:0 LISTENING
TCP 10.0.0.58:5040 0.0.0.0:0 LISTENING 7480
TCP 10.0.0.118:139 0.0.0.0:0 LISTENING 4
TCP 10.0.0.118:52450 52.63.165.133:443 ESTABLISHED 14080
TCP 10.0.0.118:52458 104.116.191.195:443 CLOSE_WAIT 8912
TCP 10.0.0.118:52791 40.100.151.2:443 ESTABLISHED 22400
TCP 10.0.0.118:52811 162.125.34.129:443 ESTABLISHED 4696
TCP 10.0.0.118:52820 34.232.224.128:443 CLOSE_WAIT 4696
TCP 10.0.0.118:52879 162.125.34.129:443 ESTABLISHED 4696
...
c) Do a TRACERT on your computer to www.google.com. Paste the output to your
assignment answer template and discuss the information being displayed (1 mark)

COIT20261 Network Routing and Switching (Term 1, 2018)
Assignment item —Written Assessment-1
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: (3 marks) 3
a)
b)
c)
IP address - 154.78.177.3/27
Binary address - 10011010.01001110.10110001.000 00011
Subnet address in binary - 11111111.11111111.11111111.111 00000
Then Wild card address - 00000000.00000000.00000000.000 11111
(0.0.0.31)
Then the network address will be - 154.78.177.0/27
Wild card address is 0.0.0.31 therefore, the Broadcast address is
154.78.177.31
Number of host = 25 = 32 in here one address is broadcast address and
another is network address. Therefore, only 30 host is usable.
So starting IP address will be – network address +1 = 154.78.177.1
and the last address will be broadcast address – 1 = 154.78.177.30
1 mark
each
item,
total 3
Question 2: (8 marks) 8
a) Address Block - 138.77.216.5/25
Address - 10001010.01001101.11011000 .00000101
Net mask - 11111111.11111111.11111111 .00000000
Wildcard - 00000000.00000000.00000000 .11111111
Broadcast - 10001010.01001101.11011000 .11111111
Number of host – 254
1
b) Subnet No. addresses Subnet address Mask /n
1 32 138.77.216.0 /26
2 32 138.77.216.64 /26
3 16 138.77.216.128 /27
4 16 138.77.216.160 /27
5 16 138.77.216.160 /27
6 16 138.77.216.224 /27
6

COIT20261 Network Routing and Switching (Term 1, 2018)
Assignment item —Written Assessment-1
c) The number of available host in the previous network address is 254. So,
it is not possible to allocate another subnet with 1024 address.
1
Question 3: (4 marks) 4
a)
i)
ii)
iii)
iv)
First Horizontal Display window – It shows the packets details like
source and destination address, protocol used for transmission, packet
number, and sort description.
Second Horizontal Display Window – It shows the full information of a
packet like size, data, source and destination address, protocol and port
details and many more.
Third Horizontal Display Window – Display the raw data of the packets.
Brand name – Helwett
IP address - 138.77.216.88
These details are found in second horizontal Display Window.
In frame 4 client send hello along with the cipher to the server. In frame
5 server send a certificate and a signature to the client. In frame 6 client
confirm the signature and certificates and end the connection.
With the help of the Wireshark, network administrator can monitor the
network and troubleshoot the network problems.
Network administrator can monitor the unauthorized access and prevent
it.
.5 mark
each
item,
total 2
for 3a.
b) Porto – Protocol used
Local Address – source computer address
Foreign Address – Remote computer address
State – Status of the present connection
PID – Process ID
LISTENING – listening the incoming connection.
ESTABLISHED – The connection is established
CLOSE_WAIT – waiting status of the connection.
1
c) 1

COIT20261 Network Routing and Switching (Term 1, 2018)
Assignment item —Written Assessment-1
Tracert find the path of the packets from source to destination network.
In the above tracert of google.com shows the packets path that travel to
the network.
Total marks awarded 15 (max)
Less late penalties if applicable
Less plagiarism penalties if applicable
Total marks earned
Markers comments: