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CWNA-109 · Question #6

What factor is likely to cause the least impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS?

The correct answer is B. Implementing Fast BSS Transition (FT) for roaming. Implementing Fast BSS Transition (FT) for roaming is likely to cause the least impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS. FT is a feature that allows a client station to quickly switch from one AP to another within the same ESS…

Network Design, Installation, and Management

Question

What factor is likely to cause the least impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS?

Options

  • AIncreasing or decreasing the number of spatial streams in use by the client station and AP
  • BImplementing Fast BSS Transition (FT) for roaming
  • CImplementation of several other clients in the same BSS using 802.11g radios
  • DRF interference from more than 10 nearby Bluetooth transmitters

How the community answered

(23 responses)
  • A
    4% (1)
  • B
    52% (12)
  • C
    13% (3)
  • D
    30% (7)

Explanation

Implementing Fast BSS Transition (FT) for roaming is likely to cause the least impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS. FT is a feature that allows a client station to quickly switch from one AP to another within the same ESS (Extended Service Set) without having to re-authenticate and re-associate with each AP. This reduces the latency and packet loss that may occur during roaming, thus improving the user experience and maintaining the application layer throughput. FT is defined in the IEEE 802.11r amendment and is also known as Fast Roaming or Fast Secure Roaming.

Topics

#802.11n throughput#Fast BSS Transition#HT BSS#roaming

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