Download - Wireless Packet Analysis Webinar Slides.pdf
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Wireless Packet Analysis with
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Introduction
Joel Crane, CWNA, CWAP Human Interface (Training and Support)
Contact: support.metageek.com
Twitter: @FuelCellWiFi
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Housekeeping
Questions?
Feel free to use the Question tool if you have a question or comment that relates to the presentation
Audio or Video Problems?
If you experience audio or video problems, it’s not you. It’s me. Let me know with the question tool.
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Webinar Recording
This webinar will be available for offline viewing within 24 hours of the end of the presentation.
Search for Wireless Packet Analysis Webinar on our knowledgebase at: support.metageek.com
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Dual-Band Wi-Fi
• Greater Range (~300 ft)
• Universal Compatibility
• Congested with Wi-Fi
• Plagued by non-Wi-Fi interference
• 3 non-overlapping channels
• Lower Indoor Range (~90 ft)
• Limited Compatibility (a/n/ac)
• 24 non-overlapping channels
2.4 GHz (802.11b/g/n) 5 GHz (802.11a/n/ac)
1 6 11
36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140 144 149 153 157 161 165
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2.4 GHz Channels
3 4 5 7 8 9 10
5 MHz Between Centers
1 2 6 11
20 MHz Wide
1 2 6 11
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Half-Duplex
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Half-Duplex
Data
Acknowledgment
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Taking TurnsThe more devices on the channel, the less time left to talk
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Slow Talkers
54 mbps
1 mbps
Slower conversations take more time
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Types of InterferenceCo-Channel
Every client and access point on the same channel competes for time to talk.
Adjacent-Channel
45
6
Every client and access point on overlapping
channels talk over each other.
Non-Wi-Fi
Microwave
Analog Camera
Cordless Phone
Non-802.11 devices compete for medium
access.
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Wi-Fi Scanner
1 2 6 11
Adjacent Channel (Worst)
Co-Channel (Better)
Open Channel (Best)
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Spectrum Analyzer
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Packet Analysis
• All activity from AP’s, laptops, tablets, smartphones
• MAC addresses of wireless clients
• Utilization of each 802.11 station
• Retransmission percentage by client
• Data rates for wireless clients
Access Point
LaptopsTablets
Smartphones
802.11 Channel
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Different Tools for Different Jobs
21
Adjacent-Channel Non-Wi-Fi Co-Channel
6 11
+
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Wireless Frame Types
3 Frame Types:
• Management
• Control
• Data
Each frame type gets a unique color
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Management Frames
• Beacons
• Probes
• Authentication
• Association
WHAT THEY DO: “Manage” stations joining and leaving wireless networks.
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Control Frames
• ACK
• Block-ACK
• RTS/CTS
WHAT THEY DO: “Control” the RF medium and aid in the delivery of
management and data frames.
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• Data
• QoS Data
• Null Data
Data FramesWHAT THEY DO:
Carry higher-level protocol data.
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One AP/One Client Conversation
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Multiple Stations
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Packet Analysis Reimagined
How Eye P.A. Visualizes Data
• Time Graph
• Multilayered Pie Charts (Treepies)
• Color Usage
• Data Tables
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2.4 GHz Congestion
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5 GHz Congestion
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Demo
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www.metageek.com/downloads
Free 7-day Trial
Free WireShark Color Profile
tinyurl.com/lbss2dy
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Pricing
+Capture in Windows with
RIVERBED AIRPCAP NX
$1149 ($50 off)
+
Capture with
AN AP, MAC, OR LINUX
$499
AIRPCAP NX FEATURES • Native Eye P.A. Support • Capture full 802.11n • 802.11ac airtime calculations • 2x2 MIMO
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Questions?
Joel Crane, CWNA, CWAP Human Interface (Training and Support)
Contact: support.metageek.com
Twitter: @FuelCellWiFi
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Thanks for Attending!