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Exam CWNA-109 All Questions

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Exam CWNA-109 topic 1 question 83 discussion

Actual exam question from CWNP's CWNA-109
Question #: 83
Topic #: 1
[All CWNA-109 Questions]

When compared with legacy Power Save mode, how does VHT TXOP power save improve battery life for devices on a WLAN?

  • A. Legacy Power Save mode was made obsolete in the 802.11ac amendment
  • B. VHT TXOP power save allows the WLAN transceiver to disable more components when in a low power state
  • C. VHT TXOP power save uses the partial AID in the preamble to allow clients to identify frames targeted for them
  • D. VHT TXOP power save allows stations to enter sleep mode and legacy Power Save does not
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Suggested Answer: C 🗳️
by 235c862 at Nov. 10, 2024, 5:27 p.m.

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235c862
1 month, 2 weeks ago
B. VHT TXOP power save allows the WLAN transceiver to disable more components when in a low power state: This is correct. VHT TXOP power save (introduced in 802.11ac) allows devices to achieve improved battery life by enabling them to power down more components of the WLAN transceiver during a TXOP (Transmission Opportunity) when they are not actively transmitting or receiving data. This approach provides better power efficiency compared to the legacy Power Save mode by allowing finer control over the device’s power usage.
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