CNET324 Lab 1 - Analysis of WiFi Spectrum (1)[1]

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Centennial College *

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Feb 20, 2024

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Lab 1 –Analysis of WiFi Spectrum Lab 1: Analysis of WiFi Spectrum Prepared by: Dr. Sattar Hussain, @ Centennial College, 2022 Name Student ID Signature* Shivani Bajaj 301312712 SB Saad 301284248 S Alka A Lokesh L 1 School of Engineering Technology and Applied Science (SETAS) Information and Computing Engineering Technology (ICET) CNET324 - Wireless Networks Course Lead: Dr. Sattar Hussain Section No. Obtained Mark (out of 20) Due Date

Lab 1 –Analysis of WiFi Spectrum *By signing above, you attest that you have contributed to this submission and confirm that all work you have contributed to this submission is your work. Any suspicion of copying or plagiarism in this work will result in an investigation of Academic Misconduct and may result in a “0” on the work, Overview Determining minimum signal strength requirements in the coverage area is the most important part of the network requirements list. Desired signal strength for optimal performance varies based on many factors, such as background noise in the environment, the number of clients on the network, the desired data rates, and what applications will be used. An open channel will always be best when deploying a wireless network, but if you have to share a channel between two or more networks, adjacent channel congestion is the one you’ll want to avoid if at all possible. When deploying a WiFi network, make sure there is at least 20 dB between the RSSI level of your network and other neighbor’s networks, as illustrated below: Chanalyzer software is a tool that helps plan, deploy, manage, test, and troubleshoot Wi-Fi and other RF systems. It detects frequency spectrums and the strength of RF signals in the air and passes that information to Chanalyzer software for recording and visual analysis of your wireless environment. Chanalyzer turns RF spectrum data collected from Wi-Spy into highly interactive charts and graphs, allowing you to visualize your wireless landscape. It displays wireless access points and other transmitters as they appear in the spectrum, giving quick insight into whether interference is WiFi or non-WiFi related. Wi-Spy devices cover different frequency bands used by WiFi and many other non-WiFi devices (900 MHz, 2.4 GHz, and 5 GHz ISM bands). This lab is designed to help you observe, analyze, and understand WiFi and non-WiFi spectrum signatures, identifying 802.11channels and patterns, bandwidth utilization, and signal strength. It helps to collect all the necessary data to test WiFi network performance and track down nearby interferers and transmitters. The software also offers tools to prepare a professional report to summarize channel traffic, network performance, and bandwidth utilization at a given interval of time. 2

Lab 1 –Analysis of WiFi Spectrum Objective Upon completion of this lab, students will be able to:  Identify WiFi and non-Wi Fi signature patterns  Identify detectable networks  Tracking down transmitters and interference  Examine the spectrum footprint of common sources of interference  Identify bandwidth utilization for different WiFi channels  Build a professional report from the collected data  Determine the best channels to deploy WLAN Hardware/Software Requirements:  3 Lenovo laptops with Windows 7 or 10  One Wi-Spy DBx USB-connected spectrum analysis hardware adapter  Wi Spy Chanalyzer visualization software Important Notes: read the following notes before starting your lab  Handle lab equipment with extra care. Dropping or misusing equipment may damage them. Ask your professor if you are not sure about any step of the lab procedure  Return all equipment and accessories to the cabinet in a neat and organize way otherwise 5 marks will deducted from your lab mark. Tied up all cables, adapter and return them to their storage box. Procedure a. All screenshots must show the time stamp at the right-bottom corner. b. Note: You are required to print your name and your lab partner's name on every single screenshot submitted within this lab. c. Throughout this lab, student groups will be assigned different numerical values for some of the analyzed parameters. The lab instructions use the letter x to refer to a certain parameter value. Whenever you see an x, replace this x with the group number. Task 1: Standalone Network Setup with Open Authentication 1. Disable all security and firewall capabilities on the laptops. Make sure to disconnect from Centennial WiFi networks. 2. Set up a wireless network using a single WAP321 access point and two PCs. Refer to CNET304 lab review for the detailed procedure on how to set up a single access point network. 3. Enable wireless radio and Single Access Point Setup. Change the wireless channel from auto mode and select a channel number as follow: Group # Channel # 1 and 2 2 3

Lab 1 –Analysis of WiFi Spectrum 3 and 4 4 5 and 6 7 7 and 8 9 4. Establish WiFi connection between two laptops. 5. Change the SSID Name to XXYYZZGRx, where x is your group number. 6. Ping the two laptops to test the network’s connectivity. Wi-Spy DBx Set Up 1. Attach the Omnidirectional antenna to the Wi-Spy DBx adapter. Connect the Wi-Spy DBx to a USB hub on the 3rd laptop. 2. Locate the Chanalyzer shortcut on the desktop or at the start menu and run the program. Wi-Spy should immediately begin to capture signal patterns. 3. If the Chanalyzer does not detect the wireless card in your computer automatically, click “Wi-Fi” in the menu bar at the top, and select the wireless card you’d like to use. NOTE: Wi-Spy is a spectrum analyzer. It is not capable of reading at the WiFi packet layer. Therefore, Wi-Spy will not appear in the WiFi card drop-down list. 4. In the menu bar, select “ View >> Wi-Fi Channels ”. This will change the x-axis to display the WiFi channels instead of the specific frequency range. Make sure the 2.4 GHz band is selected. Getting Familiar with Chanlyzer 1. In the top left corner, you can see the frequency range the Wi-Spy is currently examining – this is the session that is being recorded. Chanalyzer, by default, displays the 2.4 GHz range. Rename the session by clicking on the pencil icon to CNET324Gx, where x is your group number. 2. The top graph is the OVERVIEW Pane. This displays actual real-time radio capture data. In the toolbar above the pane, you will find different display options for WiFi network overlays and interferers. The Density View displays the data in a range of colors from the 4

Lab 1 –Analysis of WiFi Spectrum blue for infrequent transmissions to red for constant utilization (and high risk of interference). The left graph is the Waterfall View – it is a historical picture of the radio capture. You can adjust the size of the graphs by grabbing and dragging the bottom of the graphs. Enlarge both graphs a little. 5

Lab 1 –Analysis of WiFi Spectrum 3. The DETAILS pane contains several tabs with more in-depth information about WiFi networks and their channels. 4. At any time hover the mouse over the Overview Pane . This creates a hovering box above the cursor that displays specific numbers regarding a particular frequency amplitude point as shown below. 5. Select the Density view from the menu at the top of the Overview Pane 6. In the DETAILS Pane , select Networks Table, identify your network SSID, and check the box at the left to the network name. Uncheck all other networks. In the Overview Pane, 6

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