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COIT20261 Network Routing And Switching

tag 0 Download 4 Pages / 775 Words tag 17-06-2021


Question 1 – Address usage

Consider the following classless address in a given block:

Calculate the following:

a)the network address,

b)the direct broadcast address, and

c)the range of addresses available for hosts

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   Answer the following questions, showing your calculations.

a)Calculate the network address of this block, and total addresses the block contains including special addresses this block can provide.

b)Create the following 4 subnets for this company by calculating the subnet address for each subnet. Answer this question by filling in the table in the Answer template.  Your subnets must use contiguous address blocks, i.e., do not leave unallocated addresses in between two consecutive subnets. Use CIDR format for the mask.

I.1 subnet with 128 addresses

II.1 subnet with 64 addresses

III.2 subnets with 32 addresses each

c)After allocating the subnets, how many addresses are unallocated (leftover)?  Show your calculations.

Question 3 – Network Tools (Windows)

This part of the assignment requires you to explore some common networking tools, and answer the given questions. netstat and tracert are included in Windows, while Wireshark is free to download and install.  Explore these tools, then answer the questions.

a)A Wireshark scan has produced a packet capture, saved to a file named COIT20261_Assign1.pcap and available on the Unit website.  Download the file and open it in Wireshark, then answer these questions about the scan:

i.View Frame 98, and answer the following questions:  What kind of message is the frame carrying (protocol name/type). What is the destination host’s domain name?

ii.View Frame 644, and answer the following questions:  Which transport layer protocol was used?  Scan a few more frames down:  what general activity was the user most likely engaged in? – give reasons

b)A ‘NETSTAT –aon’ command has given the output as shown below.  Focussing on line 2 and 8 (highlighted), determine and write down the name or type of the application that is running over these two connections. What are the major differences between these two TCP connections or applications?

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