[Aug-2022] Check your preparation for CWNP CWNA-108 On-Demand Exam [Q37-Q59]

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[Aug-2022] Check your preparation for CWNP CWNA-108 On-Demand Exam

Practice Exam CWNA-108 Realistic Dumps Verified Questions

QUESTION 37
In an 802.11n 2.4 GHz BSS, what prevents each station from using the full network data rate (e.g. 216.7 Mbps) for user data when multiple clients are actively exchanging data with the AP?

Half of the bandwidth is allocated to uplink traffic and half to downlink traffic

All data frames must be acknowledged and the medium is shared

Radio receiver hardware cannot process data is quickly as it can be transmitted

APs do not have sufficient wired connection speeds to the LAN, even at 1 Gbps connections, with
802.11n and earlier APs

QUESTION 38
Prior to association, what parameter can 802.11 client devices measure and use to select the optimal access point for association?

Signal strength of access point beacons received

Proximity to potential access points

Retry rate of probe request and response frames

Average round trip time to reach the Internet DNS server

Average round trip time to reach the IP router

QUESTION 39
What common feature of MDM solutions can be used to protect enterprise data on mobile devices?

Over-the-air registration

Onboarding

Containerization

Self-registration

QUESTION 40
When considering data rates available in HT and VHT PJY devices, in addition to the modulation, coding, channel width, and spatial streams, what impacts the data rate according to the MCS tables?

The Frequency band in use

The client drivers

The guard interval

The height of the antennas

QUESTION 41
What is the most effective method for testing roaming in relation to 802.11 VoIP handsets?

Use a spectrum analyzer to monitor RF activity during a VoIP call.

Use a protocol analyzer to capture the traffic generated when a laptop roams.

Place a call with the handset and move around the facility to test quality during roaming.

Use the built-in roaming monitor built into all VoIP handsets.

QUESTION 42
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?

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

OFDM was first introduced in 802. 11a and is used by the ERP, HT and VHT PHYs as well

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

OFDM modulation is used only in 5 GHz 802. 11 transmissions.

QUESTION 43
What statement about 802.11 WLAN bridges is true?

WLAN bridges only work in the 2.4 GHz frequency band and they support only SISO communications

WLAN bridges must use a channel with acceptable SNR at both transceivers to maintain the desired data rate bi-directionally

WLAN bridges may support MIMO communication, but only if used in the GHz frequency band

WLAN bridges must be implemented such that no interference occurs on the channel anywhere between the two endpoints used to establish the bridge

QUESTION 44
You are reporting on the RF environment in you facility. The manager asks you do describe the noise floor noted in the report. Which of the following is the best explanation?

The energy radiated by flooring materials that causes interference in the 2.4 GHz and 5 GHz bands.

The noise caused elevators, microwave ovens, and video transmitters.

The RF energy that exists in the environment from intentional and unintentional RF radiators that forms the baseline above which the intentional signal of your WLAN must exist.

The extra energy radiated by access points and clint devices beyond that intended for the signal.

QUESTION 45
You manage a WLAN with 100 802.1lac access points. All access points are configured to use 80 MHz channels. In a particular BSS, only 40 MHz communications are seen. What is the likely cause of this behavior?

The short guard interval is also enabled

The clients are all 802.11n STAs or lower

The AP is improperly configured to use only 40 MHz of the 80 MHz allocated bandwidth

All clients implement single spatial stream radios

QUESTION 46
What best describes WPA2 in relation to 802.11 wireless networks?

WPA2 is the standard that defines security for WLANs.

WPA2 is a certification created by the Wi-Fi Alliance that validates devices correctly implement CCMP/ AES.

WPA2 is the second version of WPA and it enhances security through the use of TKIP instead of WEP.

WPA2 is specified in the 802.11 standard as implementing CCMP/AES.

QUESTION 47
You are deploying a WLAN with the access points configured for 10 mW of output power on the
2.4 GHz radios and 20 mW of output power on the 5 GHz radios. Some semi- directional antennas are also in use. What kind of deployment is described?

High density

SOHO

Standard office

Residential

QUESTION 48
Which one of the following 802.11 PHYs is more likely to be used in an industrial deployment but not likely to be used in standard office deployments?

SIG

VHT

OFDM

QUESTION 49
You are managing a wireless access point in autonomous mode using the Web based interface. You capture traffic during this management task and notice that you can see the HTML code of the Web pages used for access point management. What error in administration could be the cause of this security concern?

IPsec is not in use of the management connection as recommended

A VPN with the AP is not established

WPA2 is disabled on the WLAN

HTTP is in use instead of HTTPS

QUESTION 50
What terms accurately complete the following sentence?
The IEEE 802.11-2012 standard specifies mandatory support of the ___________ cipher suite for Robust Security Network Associations, and optional use of the ___________ cipher suite, which is designed for use with pre-RSNA hardware.

CCMP, TKIP

802.1X/EAP, WEP

TLS, SSL

RC5, RC4

QUESTION 51
You are installing AP to be used by 23 laptops. All laptops will connect on the 5 GHz frequency band. A neighbor network uses channels 1 and 6. What channel should be used for this AP and why?

Channel 6, because it is always best to use this channel

A 5 GHz channel, because channels 1 and 6 are 2.4 GHz channels they have no impact on the decision

Channel 1, because it is best to use the channel with the lowest frequency

Channel 11, because channels 1 and 6 are in use nearby

QUESTION 52
When compared with legacy Power Save mode, how does VHT TXOP power save improve battery life for devices on a WLAN?

VHT TXOP power save allows stations to enter sleep mode and legacy Power Save does not.

VHT TXOP power save uses the partial AID in the preamble to allow clients to identify frames targeted for them.

Legacy Power Save mode was removed in the 802.11ac amendment.

VHT TXOP power save allows the WLAN transceiver to disable more components when in a low powerstate.

QUESTION 53
What statement about 802.3. Clause 33 Power over Ethernet is true?

Only midspan PSEs are supported.

The lowest voltage drop is achieved when using CAT6 cable instead of CAT5 or CAT5e.

Only endpoint PSEs are supported.

When using CAT5 cabling, you increase the maximum draw available to the PD over that available with CAT6.

QUESTION 54
A company has hired you to perform a pre-deployment site survey of their facility. During an interview, the network manager informs you that the new wireless network must use 5 GHz bands and OFDM, and VoWiFi handsets will be used extensively over the wireless network.
What items do you need to include in the RF site survey report? (Choose 2)

A heat map demonstrating signal quality in areas where VoWiFi is supported.

Codec types and sampling rates for each VoWiFi phone

Security parameters and configuration steps for VoWiFi handsets.

Test results from an active survey with a VoWiFi handset

Results of OFDM versus ERP performance in each BSA

QUESTION 55
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?

Spectrum analysis to locate and identify RF interference sources.

Frequency-band hopping analysis to detect improper RF channel implementations.

Application analysis with an active phone call on an VoWiFi handset.

Protocol analysis to discover channel use on neighboring APs.

QUESTION 56
Which directional antenna types are commonly used by indoor Wi-Fi devices in a MIMO multiple spatial stream implementation?

Dish and grid

Dipole and yagi

Grid and sector

Patch and panel

QUESTION 57
You are using a tool that allows you to see signal strength for all Aps in the area with a visual representation. It shows you SSIDs available and the security settings for each SSID. It allows you to filter by frequency band to see only 2.4 GHz networks or only 5 GHz networks. No additional features are available.
What kind of application is described?

Protocol analyzer

Site survey utility

Spectrum analyzer

WLAN scanner tool

QUESTION 58
In a WALN security, what authentication method always creates Layer2 dynamic encryption keys?

Shared Key

WEP

HTTPS captive portal

EAP-TLS

QUESTION 59
During a post-implementation survey, you have detected a non-802.11 wireless device transmitting in the area used by handheld 802.11g scanners. What is the most important factor in determining the impact of this non-
802.11 device?

Receive sensitivity

Channel occupied

Airtime utilization

Protocols utilized