12

Beschreibung

cwna CWNA Karteikarten am 12, erstellt von rowelld am 12/10/2015.
rowelld
Karteikarten von rowelld, aktualisiert more than 1 year ago
rowelld
Erstellt von rowelld vor mehr als 8 Jahre
8
2

Zusammenfassung der Ressource

Frage Antworten
L2 Retransmissions When MAC sublayer frame is not acknowledged.
Aggregate Frame retransmissions Retransmitted if one of the aggregate frames is corrupted
Causes of retransmissions Multipath RF interference Low SNR
RF Interference Strong transmitting amplitude from another radio during CCA
Narrowband Interference High amplitude source of interference
Wideband Interference Disrupts entire frequency band.
Can cause inter symbol interference. Multipath
Adjacent Channel Interference From overlapping frequency space.
Low SNR Background noise too close to received signal or received signal is too low.
Near/Far Low-powered clients at greater distances to the AP will be unheard.
DRS Dynamic Rate Switching. Clients moving away from AP shift to lower rates and less complex MCS.
Co-channel Interference APs on the same channel, contending for medium. Increases overhead.
Variables that affect range of WLAN Transmission power rates. Antenna gain. Antenna type. Wavelength. FSPL. Physical environment.
Variables that affect throughput of WLAN CSMA/CA. Encryption. Application use. Number of clients. L2 retransmissions.
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