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WLAN Analyzer and Decoder - CommView for WiFi

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Introduction
About CommView for WiFi
What's New
Using the Program
Driver Installation
Overview
Main Menu
Nodes
AP and Station Details Window
Channels
Latest IP Connections
Packets
Logging
Viewing Logs
Rules
Advanced Rules
Alarms
WEP/WPA Keys
Reconstructing TCP Sessions
Reconstructing UDP Streams
Searching Packets
Statistics and Reports
Using Aliases
Packet Generator
Visual Packet Builder
NIC Vendor Identifier
Scheduler
Node Reassociation
Using Remote Agent for WiFi
Using RPCAP
Port Reference
Setting Options
Frequently Asked Questions
VoIP Analysis
Introduction
Working with VoIP Analyzer
SIP and H.323 Sessions
RTP Streams
Registrations, Endpoints, and Errors
Call Logging and Reports
Call Playback
Viewing VoIP Logs
Working with Lists in VoIP Analyzer
NVF Files
Advanced Topics
Monitoring 802.11n Networks
Understanding CRC and ICV Errors
Understanding WPA Decryption
Understanding Signal Strength
Capturing A-MPDU and A-MSDU Packets
Using CommView for WiFi in a Virtual Machine
Multi-Channel Capturing
Spectrum Analysis
Capturing High Volume Traffic
Running CommView for WiFi in Invisible Mode
Command Line Parameters
Exchanging Data with Your Application
Custom Decoding
CommView Log Files Format
Information
How to Purchase CommView for WiFi

Channels

This tab displays per-channel statistics for all the channels that have been or are being monitored. The number of channels shown in this table depends on the way you use CommView for WiFi. Normally, when you monitor only one channel used by your WLAN, the table will solely contain data on the selected channel, because the radio used in a wireless adapter can receive data on only one channel at a time. Once you have selected a different channel for monitoring, another channel will be added to the table. If you select the Scanner mode on the Nodes tab, the table will contain data on all the scanned channels for which at least one packet has been captured.  

channels

Because the 802.11 standard uses overlapping channel frequencies in the 2.4 GHz band, you might notice that even if your WLAN is configured to use only one channel, e.g. 6, you will still see non-zero values for the adjacent channels. Unlike 2.4 GHz channels, 5 GHz channels do not overlap.

On the bottom pane, you can see Packet Types and Data Rates tables. These tables display detailed statistics for the selected channel based on the packet types and subtypes and on the data rates.

On the left pane, you can see three charts: Signal Level, Packets/sec, and Mbytes/sec. The Signal Level chart displays the signal level for the top ten nodes found on the selected channel. The Packets/sec and Mbytes/sec charts show the number of packets and Mbytes per second captured on the selected channel. When working with information provided on these charts, please note the following:

·The charts display data for the selected channel only.

·The charts are updated only when the application actually captures data on the select channel. This means that if, for example, you are capturing data on channel 2 and select channel 2 from the channel list, the charts will be constantly updated. If you select channel 3, the charts will be "frozen." If you work In Scanner Mode and select any channel, the charts will be updated every time the application sweeps through the selected channel.

The meaning of the channels table columns is explained below:

Channel – channel number.

Frequency – channel frequency in MHz.

Packets – the total number of captured packets.

Signal – signal level in the min/average/max format. The average value is calculated since the data in this table was last reset. Please refer to the Understanding Signal Strength chapter for more information.

Noise – noise level in the min/average/max format. The average value is calculated since the data in this table was last reset. Noise information may not be available from all adapters. If your adapter does not support it, this column will not be visible.

Rate – data transfer rate in the min/average/max format. The average value is calculated since the data in this table was last reset.

Retry – the number of packets where the Retry flag was set.

Fragmented – the number of packets for which the Fragmented flag was set.

Encrypted – the number of Data packets for which the Encrypted flag was set.

CRC Errors – the number of packets with CRC errors. See Understanding CRC and ICV Errors for a detailed explanation.

You can show or hide individual columns by right-clicking on list header or using the View => Channels Columns menu. The column order can be changed by dragging the column header to a new location. Right-clicking on channel list brings up a menu with the following commands:

Save Channels As – allows you to save the contents of the Channels tab as an HTML report.

Clear Channels – clears the table.

More Statistics – shows a window with data transfer and protocol distribution statistics.