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Pages 334-338 - Coggle Diagram
Pages 334-338
Slow Connection?
Insufficient wireless coverage—On a network, many factors can cause data errors and a resulting decrease in performance.
RF attenuation/signal loss—Each access point’s power level, or the strength of the signal the access point emits, should be optimized for the geographic area covered by that AP.
Interference—If intermittent and difficult-to-diagnose wireless communication errors occur, interference might be the culprit.
Channel overlap—Using channels or frequencies that are too close to each other on the frequency spectrum can interfere with each other’s transmissions.
Wireless standard specifications—Each Wi-Fi standard (802.11 b/a/g/n/ac/ax) is restrained by specific throughput, speed, and distance limitations.
Simultaneous wired and wireless connections—A workstation is designed to transmit either via a wired or a wireless connection, but not both at the same time.
Problems with firmware updates—Updates to a NIC or access point’s firmware can help patch vulnerabilities and increase functionality.
Incorrect antenna type—You might think that omnidirectional antennas would nearly always be the best choice when setting up Wi-Fi coverage.
Mismatched antenna polarization—Radio waves radiating from an antenna emanate from the antenna either along the antenna’s vertical axis or along its horizontal axis.
Client saturation or overcapacity—APs vary in the number of device connections they can handle at any given time.
Client disassociation issues—If your Wi-Fi client device is frequently disassociating from the AP, confirm the AP is not using an overly crowded Wi-Fi channel and consider using a narrower channel (such as 20 MHz or 40 MHz) rather than a larger, bonded channel.
No Connection?
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Encryption protocol mismatch—Your wireless client must be able to use and must be configured to allow the same encryption protocols that your access point offers.
Incorrect passphrase—Similarly, you must use a security key, or passphrase, that matches that of the access point.
Static channel utilization—You have learned that the access point establishes the channel and frequency over which it will communicate with clients.
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Mismatched standards (802.11 b/a/g/n/ac/ax)—If your access point is set to communicate only via 802.11ac, even if the documentation says it supports 802.11n and 802.11ac, clients must also follow the 802.11ac standard.
Long AP association time—Sometimes a Wi-Fi client gets stuck waiting for the association process to complete.
Wi-Fi Network Tools
Spectrum analyzer—A 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 Wi-Fi network availability as well as help optimize Wi-Fi signal settings or help identify Wi-Fi security threats.
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