The IEEE 802.11-2016 standard requires VHT capable devices to be backward compatible with devices using which other 802.11 physical layer specification (PHY)?

1. A. ERP-PBCC
2. B. DSSS
3. C. OFDM
4. D. HR/DSSS

Correct Answer: C

You are using a site survey tool for post-implementation validation. You have installed the appropriate adapter driver and imported a floor plan. Now, you want to take the next step in proper tool use. What must you do before gathering survey data after the floor plan is imported?

1. A. Install iPerf
2. B. Install WinPCAP
3. C. Calibrate the floor plan
4. D. Nothing, you can simply start capturing signal readings

Correct Answer: C

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

1. A. VHT TXOP power save allows stations to enter sleep mode and legacy Power Save does not.
2. B. VHT TXOP power save allows the WLAN transceiver to disable more components when in a low power state.
3. C. VHT TXOP power save uses the partial AID in the preamble to allow clients to identify frames targeted for them.
4. D. Legacy Power Save mode was removed in the 802.11ac amendment.

Correct Answer: C

You were previously onsite at XYZ’s facility to conduct a pre-deployment RF site survey. The WLAN has been deployed according to your recommendations and you are onsite again to perform a post-deployment validation survey.
When performing this type of post-deployment RF site survey voice over Wi-Fi, what is an action that must be performed?

1. A. Spectrum analysis to locate and identify RF interference sources.
2. B. Frequency-band hopping analysis to detect improper RF channel implementations.
3. C. Protocol analysis to discover channel use on neighboring APs.
4. D. Application analysis with an active phone call on an VoWiFi handset.

Correct Answer: A

A client STA must choose the best AP for connectivity. As part of the evaluation, it must verify compatible data rates. What can the client STA use to verify that an AP supports the same data rates that it supports?

1. A. Beacon frames transmitted by the AP
2. B. Data frames sent between the AP and current client STAs
3. C. Authentication frames transmitted by the other client STAs
4. D. Probe request frames transmitted by other client STAs

Correct Answer: D
Reference
https://supportforums.cisco.com/t5/wireless-mobility-documents/802-11-sniffer-capture-analysis-management-f