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?

A. Spectrum analysis to locate and identify RF interference sources.

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

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

D. Protocol analysis to discover channel use on neighboring APs.

You manage a WLAN with 100 802.11ac 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?

A. All clients implement single spatial stream radios

B. The clients are all 802.11n STAs or lower

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

D. The short guard interval is also enabled

What statement about 802.11 WLAN bridges is true?

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

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

C. WLAN bridges may support MIMO communications, but only if used in the 5 GHz frequency band

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

What is always required to establish a high quality 2.4 GHz RF link at a distance of 3 miles (5 kilometers)?

A. Grid antennas at each endpoint

B. A Fresnel Zone that is at least 60% clear of obstructions

C. A minimum antenna gain of 11 dBi at both endpoints

D. Minimum output power level of 2 watts

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. Range

B. Beam width

C. Active gain

D. Receive sensitivity

What standard is referenced in the 802.11-2016 specification and is recommended for robust WLAN client security?

A. SSID hiding

B. WEP

C. 802.1X/EAP

D. IPSec VPN

What statement describes the authorization component of a AAA implementation?

A. Validating client device credentials against a database.

B. Implementing a WIPS as a full-time monitoring solution to enforce policies.

C. Granting access to specific network services or resources according to a user profile.

D. Verifying that a user is who he says he is.

You have implemented an 802.11ax WLAN for a customer. All APs are four stream HE APs. The customer states that it is essential that most of the clients can use the OFDMA modulation scheme. What do you tell the customer?

A. The clients that must support OFDMA must also be upgraded to 802.11ax

B. OFDMA is an optional feature of 802.11ax and most APs don't even support it

C. All 5 GHz PHYs use OFDM modulation, so you will achieve OFDMA everywhere in 5 GHz

D. If the devices support 802.11ac, they can be updated to support OFDMA through driver upgrades

A POE device requires 47 W of power. What POE specification should be used?

A. 802.3at

B. 802.3af

C. 802.3bt

D. 802. 11at

A natural disaster has occurred in a remote area that is approximately 57 miles from the response team headquarters. The response team must implement a local wireless network using 802.11 WLAN access points. What is the best method, of those listed, for implementation of a network back-haul for communications across the Internet in this scenario?

A. 802.11 bridging to the response team headquarters

B. Cellular/LTE/5G

C. Turn up the output power of the WLAN at the response team headquarters

D. Temporary wired DSL