COIT20261 Network Routing and Switching Written Assessment-1

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.