Free Access CWNP.CWNA-108.v2023-10-02.q83 Practice Test (Page 15)

Which directional antenna types are commonly used by indoor Wi-Fi devices in a MIMO multiple spatial stream implementation?

A.Grid and sector

B.Dish and grid

C.Patch and panel

D.Dipole and yagi

What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?

A.OFDM was first introduced in 802.11a and is used by the ERP, HT and VHT PHYs as well.

B.OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.

C.OFDM modulation is used only in 5 GHz 802.11 transmissions.

D.OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.

In an 802.11n WLAN with a heterogeneous set of associated client devices including 802.11b,
11g, and 11n, what HT protection mode will the BSS use?

A.Mode 1: Nonmember protection mode

B.Mode 0: No protection mode (Greenfield)

C.Mode 2: 20 MHz protection mode

D.Mode 3: Non-HT mixed mode

Which IEEE 802.11 physical layer (PHY) specifications include support for and compatibility with both ERP and HR/DSSS?

A.DSSS (802.11-Prime)

B.VHT (802.11ac)

C.OFDM (802.11a)

D.HT (802.11n)

Which one of the following channels can be used for VHT transmissions?

A.48

B.1

C.6

D.11

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