CWNA-108 practice questions, page 3 of 3, with answer review and explanations.
Question 11
An IEEE 802.11 amendment is in the daft state. What impact does this draft amendment have on the 802.11 standard?
Devices will be released based on the draft amendment and the draft amendment features are part of the standard.
No impact: Until an amendment is ratified, it does not become part of the standard.
No impact: Draft amendments do not become part of the standard until a working group is formed.
The standard is changed to reflect the new capabilities as soon as an amendment enters the draft stage.
Question 12
You are implementing a VHT-capable AP. Which one of the following channels is available in the 802.11-2016 standard that was not available before the ratification of 802.11 ac?
56
161
153
144
Question 13
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.
OFDM was first introduced in 802.11a and is used by the ERP, HT and VHT PHYs as well.
OFDM modulation is used only in 5 GHz 802.11 transmissions.
OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.
Question 14
Which IEEE 802.11 physical layer (PHY) specification includes support for and compatibility with both ERP and HR/DSSS?
DSSS (802.11-Prime)
OFDM (802.11a)
HT (802.11n)
VHT (802.11ac)
Question 15
An 802.11-based network uses an AP and has several connecting clients. The clients include iPhones, iPads, laptops and one desktop. What WLAN use case is represented?