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Use Wireshark tool to capture packets when you download Lecture 1 from the COIT20229 Course Webpage. Before you undertake this task, you should have Wireshark installed in your home computer/notebook and connected to the Internet. It is advisable that you have attempted the packet capture exercises using Wireshark that are scheduled for Weeks 7-9. This task cannot be completed in any CQUniversity lab.
a) Submit the captured pcap file. You should filter the file so that only TCP traffic is included.
b) What is the server IP address?
c) What is the application layer protocol involved?
d) What is the client port number for data download?
e) What is the server port number for data download?
f) How many data bytes have been downloaded?
g) What is the size of the downloaded Lecture 1 file?
h) Discuss the difference in your answers to parts f) and g). You need to consider the packets formats in your discussion.
Suppose users share a 1Mbps link. Also suppose each user requires 100Kbps when transmitting, but each user transmits only 20% of the time. When circuit switching is used, how many users can be supported?
When a message travels from source to destination through two routers, how many times the message M is modified before it reaches to the destination as M. Show your work to determine this number.
Define 'throughput' in regards to wireless network. Use a practical method (e.g., using an software) to measure throughput of a wireless network? You should provide any appropriate screenshots.
What do you think is the "traffic demand information" in this research i.e. what metric is used for traffic demand information and explain briefly how the "polling mechanism" will work to distribute the traffic demand information in this research?
Explore ways to secure a wireless network and present your findings in a brief report(1 page is fine, more is ok). Talk about your own experiences with using a wireless network, including the things you do to keep the network secure.
You decide to carry out an investigation. Write a plan for this investigation. The plan should include: digital evidence source identification, recovery, collection, documentation, and report.
Modify the hosts file to map www.google.com to yahoo's IP address and try to do a google search. Remove the modification to the host file and repeat.
You are administrator of a client-server environment. What type of network would you install and how would pieces and components of this network relate to each other?
In addition to the above-mentioned KeyboardInterrupt (used to terminate the program), you will need to handle any I/O-related exceptions.
Suppose the university has the 128.100.xxx.xxx address range on the Internet. How would you assign the IP addresses to the various subnets?
Determine the size of Ethernet MAC addresses?
A backbone network can be constructed as a switched backbone, a routed backbone or a VLAN backbone. Each of these approaches has its advantages and disadvantages.
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