In an 802.11n (H T) 2.4 GHz BSS, what prevents each station from using all the airtime when other client stations are actively communicating in the same BSS?

Question

Options

• A802.11 DOS prevention
• BOFDMA
• CCSMA/CD
• DCSMA/CA

• A
  2% (1)
• B
  7% (4)
• C
  4% (2)
• D
  88% (50)

Explanation

Explanation:What prevents each station from using all the airtime when other client stations are actively communicating in the same BSS is CSMA/C A . CSMA/CA stands for Carrier Sense Multiple Access with Collision Avoidance and is a media access control method used by WLAN devices to share the wireless medium. CSMA/CA works by having each station sense the medium before transmitting a frame. If the medium is busy (i.e., another station is transmitting), the station defers its transmission until the medium is idle. If the medium is idle, the station waits for a random backoff period before transmitting. This way, CSMA/CA reduces the chances of collisions and ensures fair access to the medium for all stations. CSMA/CA also uses positive acknowledgements to confirm successful transmissions and retransmissions to recover from errors. CSMA/CD, DOS prevention, and OFDMA are not used by WLAN devices in a BSS.

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