Practice Free CWNA-109 Exam Online Questions
To establish a four-mile point-to-point bridge link in the 5 GHz U-NII-3 band, what factors should be taken under consideration? (Choose all that apply.)
- A . Fresnel zone clearance
- B . Earth bulge calculations
- C . Outdoor power regulations
- D . Proper choice of semidirectional antennas
- E . Proper choice of highly directional antennas
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
- A . OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.
- B . OFDM was first introduced in 802.11 and is used by the ERP, HT and VHT PHYs as well.
- C . OFDM implement BPSK modulation to allow for data rates up to 7 Gbps.
- D . OFDM modulation is used only in 5 GHz 802.11 transmissions.
What are the advantages of using unlicensed frequency bands for RF transmissions? (Choose all that apply.)
- A . There are no government regulations.
- B . There is no additional financial cost.
- C . Anyone can use the frequency band.
- D . There are no rules.
While aligning a directional antenna, you notice that the signal drops as you turn the antenna away from the other antenna, but then it increases a little.
This increase in signal is cause by what?
- A . Signal reflection
- B . Frequency harmonic
- C . Side band
- D . Side lobe
Which of these security methods is the replacement for PSK authentication as defined by WPA3?
- A . Per-user/per-device PSK
- B . Wi-Fi Protected Setup (WPS)
- C . Simultaneous authentication of equals (SAE)
- D . EAP-SIM
- E . WPA2-Personal
What is required when operating 802.11ax APS in the 6 GHz band using passphrase-based authentication?
- A . VHT PHY
- B . HT PHY
- C . SAE
- D . CCMP
802.11ax BSS color information is communicated at both the PHY layer and the MAC sublayer.
Which of these statements are true about BSS color? (Choose all that apply.)
- A . The primary BSS color identifiers are blue, red, and yellow.
- B . The secondary BSS color identifiers are green, orange, and purple.
- C . BSS color is a numerical identifier.
- D . BSS color is an identifier of the basic service set.
- E . BSS color is an identifier of the basic service area.
XYZ Company has decided to install an 802.11 WLAN system that will support 1000 wireless users, but they are concerned about network security.
XYZ is interested in deploying standardized security features. In addition to WPA2-Enterprise with PEAP and role-based access control, XYZ would like to support management frame protection as well as a fast secure roaming protocol for future mobile handsets.
As XYZ Company selects a product to deploy, what two IEEE amendments, which are included in 802.11-2012, should be supported to provide the management frame protection and fast secure roaming security features? (Choose 2)
- A . 802.11j
- B . 802.11p
- C . 802.11r
- D . 802.11u
- E . 802.11w
- F . 802.11z
When replacing the antenna of a WLAN device with a similar antenna type that has a higher passive gain, what antenna characteristic will decrease?
- A . Beam width
- B . Range
- C . Active gain
- D . Receive sensitivity
- E . Fresnel Zone size
STAs operating in Infrastructure mode may communicate in which of the following scenarios? (Choose all that apply.)
- A . 802.11 frame exchanges with other STAs via an AP
- B . 802.11 frame exchanges with an AP in scanner mode
- C . 802.11 frame peer-to-peer exchanges directly with other STAs
- D . Frame exchanges with network devices on the DSM
- E . All of the above