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Troubleshooting Wi-Fi Networks - Coggle Diagram
Troubleshooting Wi-Fi Networks
Wi-Fi Network Tools
Spectrum Analyzer
device that can assess the quality of a wireless signal by scanning a band of frequencies for signals and noise
Wi-Fi Analyzer
software that can evaluate network availability, optimize signal settings, and identify security threats
can help identify channels being used by area wireless networks
Capabilities of tools
Identify transmitting APs, nodes, and channels over which they're communicating
measure signal strength from and determine range of an AP
Indicate the effects of attenuation, signal loss, noise
Interpret signal strength information
ensure proper association when moving between APs
capture and interpret traffic exchanged between APs and nodes
measure throughput and assess data transmission errors
analyze characteristics of each channel to indicate clearest channels
Avoid Pitfalls
No Connection
Wrong SSID
case sensitive
Encryption protocol mismatch
wireless client must be configured to allow the same encryption protocols that access point offers
Incorrect passphrase
must match access point
Static channel utilization
channel and frequency must be same as access point
Mismatched RF band
access point must have same wi-fi standard
Mismatched 802.11 standards
Long AP association time
must be able to receive strong enough signal from AP to complete association process
Slow Connections
Insufficient wireless coverage
keep clients well within recommended geographic range
RF attenuation/signal loss
should be optimized for geographic area covered by AP
power levels that are too low result in dropped signals
power levels that are maxed out will result in too much overlap
Interference
examples: fluorescent lights, heavy machinery, cordless phones, microwaves in data transmission path
Channel overlap
using channels too close to each other can interfere with the other's transmissions
using a wi-fi analyzer can determine which channels are being used by nearby wireless networks
wireless standard specifications
choosing the correct standard for a specific network's needs
simultaneous wired and wireless connections
consider whether the computer is trying to communicate with network through both types of connections
problems with firmware updates
updates to a NIC can patch vulnerabilities
incorrect antenna type
mismatched antenna polarization
polarization is a characteristic of an antenna that determines what axis the antenna signals will follow, vertical or horizontal axis
client saturation / overcapacity
overcapacity of number of device connections they can handle at once
client disassociation issues
confirm AP is not using overly crowded channel