Karteikarten
Troubleshooting
Karten in diesem Stapel (20)
- 1Can cause intersymbol interference (ISI), which causes data corruptionMultipath
- 2Because of the difference in time between the primary signal and the reflected signals, the receiver can have problems demodulating the RF signal’s informationdelay spread
- 3Degradation of performance resulting from overlapping frequency space that occurs due to an improper channel reuse designadjacent
channel interference - 4the difference in decibels between the received signal and the background noise (noise floor)The signal-to-noise ratio
(SNR) - 5—Disproportionate transmit power settings between multiple clients
- 6What can be a problem with physical carrier sense?all stations may not be able to hear each
other - 7As client station radios move away from an access point, they will shift down to lower bandwidth capabilities by using a process known as:Dynamic Rate Switching (DRS)
- 8When designing a 2.4 GHz 802.11b/g/n network, is a good practice to:To turn off the two lowest data rates of 1 and 2 Mbps
- 9A WLAN network administrator should consider disabling the two lowest rates on a 2.4 GHz access point for three reasons: Sticky client roaming problems
Medium contention
Hidden node problem - 10method by which client stations move between RF coverage cells in a seamless manner:Roaming
- 11What may happen if all of the APs are on the same channel:unnecessary medium
contention overhead
occurs - 12This technology introduced the capability of bonding two 20 MHz channels to create a larger 40 MHz channel effectively doubling the frequency bandwidth802.11n
- 13Proper network design now entails providing necessary coverage while trying to limit the number of devices connected to any single access point at the same time. The previous concept refers to:2 main wifi design concepts: capacity vs. coverage
- 14What is an advantage of using 5GHz Band steering over 2.4GHz?A proper 5 GHz channel reuse pattern using multiple channels will greatly decrease medium contention overhead caused by co-channel interference
- 15—Wifi Load balancing
- 16Mention some facts that can affect on wifi performance:* Transmission Power Rates
* Antenna Gain Antennas are passive-gain devices that focus the original signal
* Antenna Type Antennas have different coverage patterns
* Wavelength Higher frequency signals have a smaller wavelength property
and will attenuate faster than a lower-frequency signal with a larger
wavelength - 17attenuation of the signal as a function of distance and frequencyFree Space Path Loss
- 18Physical Environment Walls and other obstacles will attenuate an RF signal because of:absorption and other RF propagation behaviors
- 19Mention some other facts that affect performance:*Applications Use (VoiP, video, file transfer...)
*Number of Clients Remember that the WLAN is a shared medium - 20The following weather conditions must be considered for wireless outdoor deployments:*Lightning Direct and indirect lightning strikes
* highly directional antennas are susceptible to movement or shifting
caused by wind
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- Informática y Comunicaciones Karteikarten am Troubleshooting, erstellt von Hugo Castro Gould am 03/08/2022.
- Erstellt von
- Hugo Castro Gould
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