COIT20261 Network Routing & Switching (Term 1, 2018) Assignment 1

This document presents a solution to a COIT20261 Network Routing and Switching assignment from Term 1, 2018. The solution covers key networking concepts, including determining network addresses, broadcast addresses, and host ranges. It also includes subnetting exercises with detailed calculations and explanations. Furthermore, the assignment solution provides an analysis of Wireshark captures, focusing on TCP traffic, IP addresses, and TLS handshake protocols. Finally, the solution demonstrates the use of the traceroute tool to map network paths and identify hops to a destination, providing a comprehensive overview of essential network routing and switching principles. Desklib offers a wide array of study resources, including past papers and solved assignments, to aid students in their academic pursuits.

COIT20261 Network Routing and Switching (Term 1, 2018)
Assignment item —Written Assessment-1
First Name:_________________________ Last Name:_________________________
Student ID: __________________________
Question Number Mark
allocated
Mark
earned
Question 1: (3 marks) 3
a)
b)
c)
The network address : 154.78.177.0
The direct broadcast address, and : 154.78.177.31
The range available for hosts to use :
154.78.177.1 – 154.78.177.31
1 mark
each
item,
total 3
Question 2: (8 marks) 8
a)
Network Address : 138.77.216.0
Host IPs : 138.77.216.0 - 138.77.216.255
Usable Host IP Range : 138.77.216.1 - 138.77.216.254
Broadcast address : 138.77.216.255
1
b) Subnet No. addresses Subnet address Mask /n
1 32 138.77.216.0 27
2 32 138.77.216.0 27
3 16 138.77.216.0 28
4 16 138.77.216.0 28
5 16 138.77.216.0 28
6 16 138.77.216.0 28
6

COIT20261 Network Routing and Switching (Term 1, 2018)
Assignment item —Written Assessment-1
c) /24 is the mask. So maximum 255 IPs only possible. 1
Question 3: (4 marks) 4
a)
i)
ii)
iii)
iv)
In the first content have timeframe of the capture.
The second content is source IP address of the TCP traffic
The third content is destination IP address of the TCP traffic.
Hewlett Packardcomputer launched this scan and it has IP address of
138.77.216.88. The frame 3 is acknowledgement response from the web
server IP address 104.244.42.136 to the above Hewlett Packard
computer. The request was https (tcp/443) traffic.
The Frame 4-6 was TLS negotiation for certificate key exchange. The
Frame 4 sent handshake protocol from server hello and followed by
frame having certificate to the client and finally server completed the
server key exchange.
Wireshark may be used to diagnose and troubleshoot a number of
network problems and issues. These include:
· Slow or under-performing web servers - Users complaining about
slowness due to various reasons.
· The analysis of HTTP traffic, Gaining visibility into commands and
parameters, HTTP headers, and requests to servers
· Viewing and analyzing responses to the client from the server, including
HTTP headers, commands and the HTML that’s returned
.5 mark
each
item,
total 2
for 3a.
b) LISTENING
The socket is listening for incoming connections. Both are opened ports
but one is waiting for a connection to be made while the other has a
1

COIT20261 Network Routing and Switching (Term 1, 2018)
Assignment item —Written Assessment-1
connection already made.
ESTABLISHED
The socket has an established connection.
The HTTPs protocol (typically port 443) is on LISTEN mode until
somebody actually goes to the server. The moment somebody visits the
page, then it will be in ESTABLISHED mode.
STABLISHED & LISTEN both are Open Ports but ESTABLISHED
means it is connected while LISTEN means that is waiting to be
connected
CLOSE_WAIT
The remote end has shut down, waiting for the socket to close.
CLOSE_WAIT indicates that the remote endpoint (other side of the
connection) has closed the connection.
c)
The tracert was ran from my computer to www.google.com. The results is
the trace to the www.google.com is completed with all hops.
The Traceroute tool is showing here to google.com each hop
sequentially, and total hops required (9 hops to reach www.google.com).
For each hop, its shows the hop number with next IP address, roundtrip
time, best time (ms) and Time To Live
1
Total marks awarded 15 (max)
Less late penalties if applicable
Less plagiarism penalties if applicable

COIT20261 Network Routing and Switching (Term 1, 2018)
Assignment item —Written Assessment-1
Total marks earned
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