COIT20261 Network Routing and Switching

Assessment Requirements and Marking Criteria

There are 3 main questions with some sub-questions and the requirements are stated for each one.  You must answer all questions and their sub-questions.  Marks are indicated in the Answer Template.

The questions will be marked on correctness, logic and clarity, and addressing all parts of the question.

Question 1 – Address usage

Consider the following classless address block:
List the addresses from this block that would be used as:

a)the network address,
b)the direct broadcast address, and
c)the range available for hosts to use

Show the steps you took to arrive at your answers.

Question 2– Allocating subnets from a block

A company has been granted a block of addresses which includes the address 138.77.216.5/24.   Answer the following questions, showing your calculations.
a)Calculate the network address of this block and how many host addresses including special addresses this block can provide
b)Create the following 6 subnets for this company by calculating the subnet address for each subnet.  Answer this question by filling in the table in the Answer template.  Use CIDR format for the mask.

I.2 subnets with 32 addresses each
II.4 subnets with 16 addresses each
c)After some time, the company decides that it wants another subnet with 1,024 addresses.  Explain whether this can be allocated from the existing block.

Question 3 – Network Tools

Often the best way to gain an initial familiarity with network tools is to simply use them, at a basic level in exploratory mode as suggested in some of the tutorial exercises.  Netstat and Tracert are included in Windows, while Wireshark is free to download and install.  Explore Wireshark, Netstat and Tracert, then complete this question.
a)A wireshark scan has produced a packet capture, saved to a file named wireshark_capture01.pcapng and available on the Unit website.  Download the file and open it in Wireshark, then answer these questions about the scan:

i.Very briefly summarise in your own words the content in each of the three horizontal display windows in Wireshark

ii.In Frame 3, what brand of computer launched this scan and what was its IP address?  State where this information is found

iii.Briefly explain the exchange event captured in frames 4 - 6