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COIT20261 | Assignment 1 Network Routing and Switching | Network Routing and Switching

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Question 1 – Address usage                                                                         (3 marks)
Consider the following classless address block:
154.78.177.3/27
Listthe addresses from this block that would be used as:
the network address,
the direct broadcast address, and
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 whichincludes the address138.77.216.5/24.   Answer the following questions, showing your calculations.
Calculate the network address of this block and how many host addresses including special addresses this block can provide (1 mark)
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.
2 subnets with 32 addresses each (2 marks)
4 subnets with 16 addresses each (4 marks)

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 wireshark scan has produced a packet capture, saved to a file named pcapng and available on the Unit website. Download the file and open it in Wireshark, then answer these questions about the scan:
Very briefly summarise in your own words the content in each of the three horizontal display windows in Wireshark (.5 mark)
In Frame 3, what brand of computer launched this scan and what was its IP address? State where this information is found (.5 mark)
Briefly explain the exchange event captured in frames 4 – 6 (.5 mark)
Describe in your own words two specific network problems that a network administrator could use Wireshark for as a troubleshooting tool? (.5 mark)
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
ProtoLocal 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
…

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)
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)

1 mark each item, total 3

Question 2: (8 marks)

8

a)

1

b)

Subnet

No. addresses

Subnet address

Mask /n

1

32

 

 

2

32

 

 

3

16

 

 

4

16

 

 

5

16

 

 

6

16

 

 

 

6

c)

 

1

Question 3: (4 marks)

4

a)
i)

ii)

iii)

iv)

.5 mark each item, total 2 for 3a.

b)

1

c)

1

Total marks awarded

15 (max)

Less late penalties if applicable

Less plagiarism penalties if applicable



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