Hands-on Activity 4A: Capturing Packets on Your Network

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gehpi

Writing

Description

Purpose

In this activity we will learn how to "look" inside packets using a tool called Wireshark, sometimes called Ethereal. This is a packet sniffer that allows us to monitor packet transmission. While you can eavesdrop with this tool, it also provides you with a wealth of information to analyze data and troubleshoot network problems. For example you will see how the headers of the network layers differ from each other.

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You must use your home computer to complete this project.

Directions

1. Go to Wireshark and download and install Wireshark.wireshark logo

2. Launch Wireshark. You will see a screen similar to Figure 4.14 on p. 114. Using your screen shot software, take a picture of this screen.

3. Follow step#2, a - c, on p. 114.

4. While Wireshark is on, open a Web browser and visit www.nvcc.edu or www. google.com. At this point, Wireshark will capture some packets. Let it capture packets for about 30 seconds. Then click STOP.

5. You will have a screen similar to Figure 4-15 on p.115. Using your screen shot software, take a picture of this screen.

6. Create a new WORD document and paste your screen captures for steps #2 and #5 in this document. Write a short essay (3 - 4 paragraphs) describing your project result and explain the contents of your screen captures. Look at the screen shot of your step 5 and answer the following questions:

  • How many packets did you capture? (hint: look at the first column of your captured screen).
  • What protocols do you see? (4.5)
  • List some source addresses you see.
  • List some of the destination addresses you see.

Grading

This assignment is worth 50 points and will be graded on completeness and accuracy. I will look that screen captures for #2 through #5 are included and that your essay is 3-4 paragraphs which explicitly answer the 4 questions above.

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Explanation & Answer

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While doing the Wireshark assignment I’ve noticed a couple of things. Wire shark is a
network analysis tool formerly known as Ethereal. It capt...


Anonymous
Really useful study material!

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