Lab 10 Manual Wireless LAN Technology and the IEEE 802.11

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Durham College *

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CYBERSECUR

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Electrical Engineering

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Jan 9, 2024

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CBER 702: Communication Networks Wireless Communications Networks & Systems Lab 10. Wireless LAN Technology and the IEEE 802.11 Page 1 of 11

Lab 10.1: Wi-Fi Site Survey Scope: The purpose of this Lab is to obtain an understanding of the RF characteristics of Wi-Fi and carryout a site survey to validate performance in the real world. Carry out a latency and speed test at each location and anyze. The student will download the Wi-Fi Analytics App for the smartphone from Google Store or App Store. The urls for Wi-Fi / Network Analyzer are: For Android: https://play.google.com/store/apps/details?id=com.farproc.wifi.analyzer&hl=en Informations : https://techet.net/netanalyzer/help.html?android=1 For iOS: https://apps.apple.com/us/app/network-analyzer/id562315041#?platform=iphone Informations : https://techet.net/netanalyzer/help.html The url for the Speed Test App are : For Android : https://play.google.com/store/apps/details?id=com.pzolee.android.localwifispeedtester&hl=en_CAFor For iOs: https://www.speedtest.net/apps/ios Students will obtain an understanding of the following: 1. How Smartphones can be used for optimising and troubleshooting Wi-Fi networks. 2. Understand the relationship between signal strength, channel numbers and interference. 3. Carryout a Field test recording and analyzing the Signal strength, Channels in use, and other parameters to better comprehend the impact of terrain, building infrastructure and distance on handoff and coverage. 4. Map the Wi-Fi coverage at the location – in their neighbourhood. 5. Map the latency and speed obtained Equipment required; Android or Apple Smart Device Spectrum and Security Set Up 1. Download the WiFi Analyzer App (for Android phones) or Speed Test & Network Analyser for for iOS on your phone. 2. Get familiarised with the tabs and the functionality Page 2 of 11

3. Visit the respective Web site to view the documentation https://support.netanalyzer.techet.net/ 4. Each student / member of the team will need to take the needed measurements. 5. Take manual speed and latency test measurements at a minimum of 5 different locations and note the results. Screen shots of the Application and Essential learning. Tasks on Android Phone : (Tasks on iPhone : GOTO Page 7) Part A 1: WAPs and Spectrum: https://www.youtube.com/watch? v=x4jf3SFP0kg&list=RDCMUCfiZzwbPTOw8MCQfyxES43A&index=1 Setting → Apps → Wifi Analyzer → Permissions → Enable Location and Storage Q1: What characteristics does this screen show? What do they mean? Ans: Q2: Provide a snapshot of your measurements that shows the spectrum map as above. Take Scree Shot #1 and Paste Here Part A 2: Channels used, MAC address and Security. Click → Eye → Choose Ap List Page 3 of 11

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Q3: Why are different channels used by various access points? Ans: Q4: Provide a screenshot of the AP you monitored. Take Scree Shot #2 and Paste Here Q4.1: What security measures are taken by the AP you are monitoring? Ans: Q4.2: Explain WPA – PSK-TKIP Ans: Q4.3: WPA PSK-CCM: Ans: Page 4 of 11

Q5: Describe its benefits and vulnerabilities. Ans : Part B : Site Survey. For your site survey: 1. Select an area that you will survey. 2. Measure the signal strength, channel used and potential interferers at a minimium of 5 locations. 3. Complete the table below. Location Range of Signal Strength Channels used Intereferers. Comments Location 1. Location 2. Location 3. Location 4 Location 5. Part C: Latency and Speed Test Use the app for your device. 1. Start “Wifi Speed Test” and press “START” button 2. You should see the following for the Android device: 3. Select an area that you will survey. Page 5 of 11

4. Measure the the latency and speed test and complete the table below. Location Range of Signal Strength (dBm) Channel Latency Uplink speed. Down link speed Location 1. Location 2. Location 3. Location 4 Location 5. Q6: What is the range of latency and speed do you obtain? Ans: Q 7: Where these measurements on the same channel? If so why? If not why not? Ans: Q 8: Was there a difference in the uplink and downlink speeds? If so why? Ans: Reflections (200- 300 words): {15% of the lab grade} In your own words, what did you learn in terms of Channel choice, latency and throughput? Write Here: Page 6 of 11

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{Skip Tasks on iPhone and go to page 10 for Lab 10.2} Tasks on iPhone: Part A: Analyze WiFi channels on iPhone https://www.youtube.com/watch?v=75Q_v03SKTQ 1. Download the AirPort Utility from the Appstore ( https://apps.apple.com/us/app/airport- utility/id427276530 ) 2. Go to iOS Settings and find scroll down until you find the AirPort Utility. ... 3. Turn WiFi Scanner on. ... 4. Open AirPort Utility and tap Wi-Fi Scan. ... 5. Change the Scan Duration from Continuous to 30 seconds by moving the Slider. 6. Click “Wi-Fi Scan” 7. Click “Scan” and stop after Networks appeared Take Scree Shot #1 and Paste Here 8. Choose your Wi-Fi Network Take Screen Shot # 2 and Paste Here Page 7 of 11

Part B: Site Survey . For your site survey: 1. Select an area that you will survey. 2. Measure the signal strength, channel used and potential interferers at a minimium of 5 locations. 3. Complete the table below. Location Range of Signal Strength Channels used Intereferers. Location 1. Location 2. Location 3. Location 4 Location 5. Part C: Latency and Speed Test https://apps.apple.com/us/app/internet-speed-test-speedcheck/id616145031 Use the app for your device. 1. Launch “SpeedTest” and press “GO” 2. You should see the following for the iPhone: Page 8 of 11

3. Select an area that you will survey. 4. Measure the the latency and speed test and complete the table below. Location Latency (Ping) Uplink speed. Down link speed Packet Loss % Page 9 of 11

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Location 1. Location 2. Location 3. Location 4 Location 5. Q1: What is the range of latency, Download Speed and Down Load speed do you obtain? Ans: Latency: Download Speed: Upload Speep: Q 2: Was there a difference in the uplink and downlink speeds? If so why? Ans: Reflections (200- 300 words): {15% of the lab grade} In your own words, what did you learn in terms of Channel choice, latency and throughput? Write Here: Lab: 10.2 SOHO (s mall offices and home offices) WAP & Router Scope: The purpose of this Lab is to obtain an understanding of the architecture of a SOHO router with Wi-Fi capability and features that are generally available. Compare 2 such devices that are available in the market place. Lab: Question 1: Draw your conceptual view of the components/ services provided by a SOHO router. (3 points) Answer: Question 2: Analyze the technical characteristics offered. Provide a brief understanding of the spec that you are analyzing e.g. the modulation will determine the throughput that can be offered but will limit the coverage obtained. Analyze different modulation schemes in brief. (7 points) Technical Spec Brief description Device 1 Device 2 Bands Supported Modulation Schemes Supported Page 10 of 11

Channel Aggregation Throughput offered (marketed) MU-MIMO supported (# of streams). Wireless Mesh Supported, it’s advantages Support for wired devices – interfaces supported Router capacity Support for USB ports. Additional features 1. Gaming 2. Firewall 3. DHCP Page 11 of 11