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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.
If programmer are paid 20 dollars per hour and CPU time costs 50 dollars per minute, determine how many times should a problem of size 500 be solved by using Alg2 to explain its development cost?
The organization has class C network 200.1.1 and wishes to form subnets for four departments. Write down possible arrangement of subnet masks to make this possible.
If IPSec gives security at network layer, why is it that security mechanisms are still require at layers above IP?
Derive a sequential circuit with two inputs (S1 and S2) and one output (z) using D flip flops that will output z=1 if a S1=S2=0 is input, then a S1=S2=1 is input, then a S1=S2=0 is input.
You are asked to configure the backbone switch which connects servers supplying oceanic and atmospheric data to mariners and pilots around world.
What is the use of reference bandwidth in OSPF and why do we need to change the reference bandwidth when we use 10Gbps connections?
Describe how protocols make sure services running on one type of device can send to and get data from many different network devices.
From RFC 1034, DNS domain names are composed of labels. Are there any labels which nodes are not allowed to allot to their data? If so, what are they?
Find out the number of routers the university will require to connect all its buildings to internet (including the main router of the university). Sketch small diagram describing configuration you are suggesting.
Wireless DSL is available in her apartment building for $45 per month for 1.5 Mbps down and 256 Kbps up. Explain the differences in these services and make a recommendation.
A computer system provides protection using the Bell-LaPadula policy. How would a virus spread if: The virus were placed on the system at system low (the compartment that all other compartments dominate)?
Company A has about 100 employees spread over three locations in the same city, all linked by fast network connections. The IT/IS administration is centralized and includes the helpdesk.
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