Network Routing and Switching COIT20261 Assignment 1, Term 2, 2019

This document presents a solved assignment for COIT20261, focusing on network routing and switching. The assignment includes questions on subnetting, where the student calculates network addresses, usable addresses, and direct broadcast addresses for a given classless address block. Another question involves subnetting a given network and determining subnet addresses, masks, and address ranges. The solution also analyzes Wireshark captures, explaining the purpose of HTTPS and ARP messages. It also includes explanations of route print outputs and IP configuration details, including interface lists, IPv4 addresses, subnet masks, and default gateways. The assignment is well-structured, with clear answers and explanations, demonstrating a solid understanding of the core concepts in network routing and switching.

COIT20261 Network Routing and Switching Term 2, 2019
Assignment item —Written Assessment-1
ANSWER TEMPLATE ASSIGNMENT ONE
Type your answers in the spaces provided
Marking criteria: Your answers will be marked based on technical correctness,
completeness, clarity and relevance. Questions that ask you to show your working or
calculations or the steps you took to arrive at your answers, may have marks deducted if
such information is not provided. If a question requires you to submit a graphic (e.g. a
screenshot or a diagram), the graphic must have sufficient resolution to show all its
details clearly and be of a reasonable size for normal reader viewing, with all or any text
within the graphic being legible and readable, in order to be marked.
First Name:_________________________ Last Name:____________________________
Student ID: __________________________
Your Answers Mark
allocated
Mark
earned
Question 1: (3 marks) 3
a)
b)
c)
For the classless address block 157.150.38.25/27
The network address is - 157.150.38.0 and the last usable address is
157.150.38.30
The direct broadcast address is - 157.150.38.31
30 address are available as the host address for the given address block.
1 mark
each
item,
total 3
Question 2: (8 marks) 8
Subnet Name No. of
Address
Subnet Address Mask
A 32 172.38.216.0 /26
B 32 172.38.216.64 /26
C 32 172.38.216.128 /26
6

COIT20261 Network Routing and Switching Term 2, 2019
Assignment item —Written Assessment-1
D 16 172.38.216.192 /27
E 8 172.38.216.224 /28
F 8 172.38.216.240 /28
Calculations: first address, total addresses, correct prefixes
Network Address = 172.38.216.22/25
Binary notation of the address block
10101100. 100110. 11011000. 00010110
Binary notation of the net mask
11111111. 11111111. 11111111. 10000000
Decimal notation of the wild card mask
00000000.00000000.00000000 .01111111
Network
10101100. 00100110. 11011000.00010110
= 172.38.216.22/25
172.38.216.1 is the first assignable IP address for the address block
It can include 126 address including the broadcast address
The correct prefix for the address block is /24
Total IP address needed is 144 and /25 can allocate 126 IP address and
thus the subnet fails. Thus /24 is selected that is capable of allocating 254 IP
address.
2
Question 3: (4 marks) 4
3A
i
ii
Wireshark
Frame 5 (1 mark):
The packet is from client to server and it has been found from analyse
section Follow > TCP stream option in wireshark.
Secured web application using HTTPS is responsible for this ACK
message. This is because the port 443 is used as the source port for the
frame and it is used for HTTPS.
Frames 446 – 447 (1 mark):
2

COIT20261 Network Routing and Switching Term 2, 2019
Assignment item —Written Assessment-1
In the frame 446 and 447 it has been found that address resolution
protocol is used for discovering and mapping layer 2 hardware address
and the layer 3 protocols. A connection is established with device named
cannon_7d.
3B Route print:
Network Destination: Used for listing the reachable network and it
matches the IP address of the destination along with netmask.
Netmask: Used for listing subnet mask that is used by the host for
determining network and host portion for a IP address.
Gateway: Used for listing the IP address used by the host to send data
packets over a remote network end point. In case if the end point is
connected directly on link is displayed as the gateway in output.
Interface: The IP address used for configuring local network adaptor is
displayed and is utilized for forwarding the data packet in the network.
Metric: The cost of the route is displayed and it helps in calculating best
route to reach a destination address. The lower metric is preferred for
sending data packets over the network.
1
3C IPCONFIG: 1

COIT20261 Network Routing and Switching Term 2, 2019
Assignment item —Written Assessment-1
The interface list is used for displaying the Media Access Control
address and the interface number of each of the network capable
interface for the host device.
The main network adapter is the Ethernet adapter and the details are
given below:
Ethernet adapter Ethernet:
Connection-specific DNS Suffix . :
Link-local IPv6 Address . . . . . : fe80::81f3:1e29:193e:ca10%24
IPv4 Address. . . . . . . . . . . : 10.10.64.45
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 10.10.64.254
The details of the wifi adapter are given below:
Wireless LAN adapter Wi-Fi:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Total marks awarded 15 (max)
Less late penalties

COIT20261 Network Routing and Switching Term 2, 2019
Assignment item —Written Assessment-1
Less plagiarism penalties
Total marks earned
Markers comments:
Bibliography
Emerson, R.G., 2017. Information Technology Issues.
In Continuous EEG Monitoring (pp. 643-656). Springer, Cham.
Ren, S., Yu, D., Li, G., Hu, S., Tian, Y., Gong, X. and Moskowitz,
R., 2019, August. Routing and Addressing with Length Variable IP
Address. In Proceedings of the ACM SIGCOMM 2019 Workshop on
Networking for Emerging Applications and Technologies (pp. 43-
48). ACM.