What factor is likely to cause the least impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS?

Implementing Fast BSS Transition (FT) for roaming

Increasing or decreasing the number of spatial streams in use by the client station and AP

Implementing Fast BSS Transition (FT) for roaming

Implementation of several other clients in the same BSS using 802.11g radios

RF interference from more than 10 nearby Bluetooth transmitters

You recently purchased four laptops containing dual-band 802.11ac adapters. The laptops can connect to your 2.4 GHz network, but they cannot connect to the 5 GHz network. The laptops do not show the 5 GHz SSIds, which are different than the 2.4 GHz SSIDs. Existing devices can connect to the 5 GHz SSIDs with no difficulty. What is the likely problem?

Interference from non-Wi-Fi sources

What can cause excessive VSWR in RF cables used to connect a radio to an antenna?

Radio output power above 100 mW but below 400 mw

High gain parabolic dish antenna

You are troubleshooting a problem with a new 802.11ax AP. While the AP supports four spatial streams, most clients are only achieving maximum data rates of 150 Mbps. What is the likely cause?

The clients are 802.11n devices

The clients are only two stream 802.11ax clients

Contention caused by an overlapping BSS

Non-Wi-Fi interference in the channel

When an ACK frame is not received by the transmitting STA, what is assumed?

The frame was not delivered and must be retransmitted

The receiver processed the frame, but did not respond with an ACK frame because 802.11w is enabled

The frame was correctly delivered

The frame was not delivered and must be retransmitted

When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs respond?

Each AP responds in turn after preparing a probe response and winning contention.

For each probe request frame, only one AP may reply with a probe response.

Each AP checks with the DHCP server to see if it can respond and then acts accordingly.

After waiting a SIFS, all APs reply at the same time with a probe response.

What statement about the IEEE 802.11-2016 QoS facility is true?

802.11 QoS is achieved by giving high priority queues a statistical advantage at winning contention.

802.11 control frames are assigned to the 802.11 EF priority queue.

When the Voice queue has frames awaiting transmission, no data will be transmitted from the Best Effort queue.

802.11 QoS is achieved by giving high priority queues a statistical advantage at winning contention.

Four 802.1p user priorities are mapped to eight 802.11 transmit queues.

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?

The clients are all 802.11n STAs or lower

All clients implement single spatial stream radios

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

The short guard interval is also enabled

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 the WLAN transceiver to disable more components when in a low power state.

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 power state.

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

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

What 802.11 network configuration would result in multiple stations broadcasting Beacon frames with the same BSSID but with different source addresses?

An IBSS is used instead of a BSS.

Multiple APs have been loaded with the same configuration from an image file.

A single AP supports multiple BSSs with different SSIDs.

An IBSS is used instead of a BSS.

What primary metric of scanning can stations use to select the best AP for connectivity to the desired BSS?

Signal strength of AP beacons received.

PING latency when testing against an Internet server.

FCS errors in frames transmitted to and from the AP.

Your consulting firm has recently been hired to complete a site survey for a company desiring an indoor coverage WI-AN. Your engineers use predictive design software for the task, but the company insists on a pre-design site visit.What task should be performed as part of the pre-design visit to prepare for a predictive design?

Evaluate the building materials at the facility and confirm that the floor plan documents are consistent with the actual building

Install at least one AP on each side of the exterior walls to test for co-channel interference through these walls

Collect information about the company's security requirements and the current configuration of their RADIUS and user database servers

Test several antenna types connected to the intended APS for use in the eventual deployment

Evaluate the building materials at the facility and confirm that the floor plan documents are consistent with the actual building

You are the network administrator for ABC Company. Your manager has recently attended a wireless security seminar. The seminar speaker taught that a wireless network could be hidden from potential intruders if you disabled the broadcasting of the SSID in Beacons and configured the access points not to respond to Probe Request frames that have a null SSID field.Your manager suggests implementing these security practices. What response should you give to this suggestion?

Any 802.11 protocol analyzer can see the SSID in clear text in frames other than Beacons frames. This negates any security benefit of trying to hide the SSID in Beacons and Probe Response frames.

To improve security by hiding the SSID, the AP and client stations must both be configured to remove the SSID from association request and response frames. Most WLAN products support this.

Any tenants in the same building using advanced penetration testing tools will be able to obtain the SSID by exploiting WPA EAPOL-Key exchanges. This poses an additional risk of exposing the WPA key.

This security practice prevents manufacturers' client utilities from detecting the SSID. As a result, the SSID cannot be obtained by attackers, except through social engineering, guessing, or use of a WIPS.

What cipher suite is specified by the 802.11-2016 standard and is not deprecated?

Counter Mode with CBC-MAC Pro tocol

Temporal Key Integrity Protocol

Counter Mode with CBC-MAC Pro tocol

Extensible Authentication Protocol

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?

HTTP is in use instead of HTTPS

IPsec is not in use of the management connection as recommended

A VPN with the AP is not established

HTTP is in use instead of HTTPS

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

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

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.

What statement about 802.11 WLAN bridges is true?

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

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 communications, but only if used in the 5 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

An AP is advertised as a tri-band, 4x4:4, Wi-Fi 6, 802. 11ax AP. Based on this information and assuming it is correctly advertised, what can be determined as certainly true about this AP?

It supports four channels in 2.4 GHz and 4 channels in 5 GHz

It uses a modified OpenWRT firmware

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?

802.11 bridging to the response team headquarters

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

CWNP CWNA-109 Practice Test 2 - Free Online Exam Prep & Questions

Question 1 / 40

When antenna gain is reported in dBi, the gain of the antenna is compared to what theoretical radiator?

End-fire radiator

Dipole radiator

Isotropic radiator

Anthropomorphic radiator

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