最新的CWNP CWAP-404免費考試真題

問題1

The IEEE 802.11 Dynamic Frequency Selection (DFS) service is capable of performing what functions? (Choose 2)

A. Using modulation switching techniques to avoid interfering with radar systems

B. Establishing an interference baseline on all 2.4 GHz channels

C. Requesting and reporting of measurements in the current and other channels

D. Suspending operations on a channel with high IEEE 802.11 co-channel interference

E. Testing channels for radar before using a channel and while operating in a channel

正確答案: C,E

問題2

Given: ABC Company recorded the 2.4 GHz band with a spectrum analyzer prior to installing their ERP WLAN. Image-A is how the band appeared prior to the WLAN installation. Image-B is how the band appears now, and all channels on their WLAN have ceased to function.

What is the best explanation as to why their WLAN is no longer functioning properly?

A. A new microwave oven was installed in the cafeteria.

B. A malfunctioning IEEE 802.11 OFDM radio card is transmitting continuously.

C. A Terminal Doppler Weather Radar (TDWR) is causing a DFS response across the entire band.

D. A manual site survey tool is actively testing the throughput of their WLAN.

E. A wideband RF power source is corrupting all IEEE 802.11 transmissions.

正確答案: E

問題3

You are evaluating a protocol capture file in Wireshark.
The following filter is applied:
wlan_radio.11ac.bandwidth - - 4
What kind of frames are displayed?

A. Only 40 MHz frames

B. Only frames supporting 4 radio chains

C. Only frames supporting 4 spatial streams

D. Only 80 MHz frames

正確答案: D

說明：（僅 Fast2test 成員可見）

問題4

IEEE 802.11-2007 specifies two ERP protection mechanisms: RTS/CTS and CTS-to-Self.
Which statement is true regarding these two protection mechanisms? (Choose 2)

A. RTS and CTS frames use Short Interframe Spaces (SIFS), and CTS-to-Self frames use PCF Interframe Spaces (PIFS).

B. A CTS-to-Self frame sent by a client station may reach fewer nodes than the RTS/CTS frame exchange.

C. Use of RTS/CTS requires more overhead than CTS-to-Self due to a higher number of frames transmitted onto the wireless medium.

D. Aside from the Subtype subfield of the Frame Control field, the generic MAC header format of RTS and CTS frames are identical.

E. By definition, all associated client stations in a BSS can hear RTS, CTS, and CTS-to-Self frames, so RTS/CTS and CTS-to-Self mechanisms have equal effectiveness.

F. RTS and CTS frames are relayed through the access point, whereas the CTS-to-Self frames are not.

正確答案: B,C

問題5

You have been asked to recommend a solution for protocol capture of 802.11 frames consisting of 3x3:3 802.11ac communications. The requirement specifies that you gain a general view of a coverage area and does not require that you capture from specific user locations. The solution must be the least expensive practical solution possible that does not disrupt user access to the WLAN and it must be based on enterprise WLAN hardware.
What solution would you recommend so that any coverage area could be monitored on demand?

A. Install the minimum number of Aps required for coverage and use these Aps for protocol analysis as needed

B. Install sufficient Aps so that an AP can be taken offline to perform protocol analysis as needed

C. Install Wireshark on the Aps natively to allow dynamic capture while serving clients

D. Install laptop-based protocol analyzer near each AP

正確答案: B

問題6

You are tasked with describing the various frames used in 802.11 communications.
What frame is used for spectrum management, fast BSS transition and some other actions taken within a BSA?

A. CTS

B. PS Poll

C. Action

D. BlockAck

正確答案: C

問題7

You are performing 802.3 network analysis. For what are the DA and SA fields used in the frame header?

A. Defining the addresses sending and receiving the frame

B. Defining either direct access or sourced access

C. They are not used; addresses are only used in the 802.11 header

D. Defining either distance access routing or strict access routing

正確答案: A

問題8

The manager in the security group is concerned about compliance with security policies on the WLAN. The budget is not available for a full WIPS SOLUTION. He has asked you to implement a process that will verify compliance.
What would you recommend in such a scenario?

A. Implement AP-based sensors throughout the facility and then monitor for performance issues with these sensors

B. Simplify enable 802.11w, which will enforce management frame compliance

C. Use a laptop-based protocol analyzer that provides compliance reporting to monitor the environment on a periodic basis

D. Use the built-in spectrum analyzer features of the APs to ensure that WPA2-Enterprise is implemented throughout the organization

正確答案: C

問題9

You have installed a new 802.11ac WLAN configured with 80 MHz channels. Users in one area are complaining about poor performance. This area is currently served by a single AP. You take a spectrum analysis capture in the poor performing area. While examining the waterfall plot you notice the airtime utilization is higher on the first 20 MHz of the 80 MHz channel when compared to the rest of the channel. What do you conclude?

A. The first 20 MHz is the AP's primary channel and higher airtime utilization on the primary channel is normal when an AP Is configured for 80 MHz operation

B. Non Wi-Fi interference is preventing the APs 80 MHz operation

C. The AP is misconfigured and needs to be reconfigured to 80MHz operation

D. RRM is enabled and has dynamically picked a 20 MHz channel

正確答案: B

說明：（僅 Fast2test 成員可見）

問題10

iPerf is a tool used in what category of testing?

A. Throughput

B. Connection

C. Name resolution

D. Configuration

正確答案: A

問題11

You have implemented an AP at a remote office. It is a single-band AP supporting 802.11ac.
Several users complain that their laptops cannot connect to the WLAN. These laptops are from multiple vendors and range in age from 2 to 4 years. The SSID and security profile settings are correct. All default settings were used on the AP with the exception of the SSID and security settings. What is the most likely issue preventing these STAs from connecting to the AP?

A. They are 2.4 GHz-only devices

B. They do not support VHI and only support OFDM

C. They do not support the basic data rates

D. They are 5 GHz-only devices

正確答案: A

說明：（僅 Fast2test 成員可見）

問題12

You need to determine RF activity over time in a spectrum analyzer. It is to be able to see the activity and the amplitude of that activity.
What kind of view should be used?

A. Device listing

B. Real-time FFT

C. Swept spectrogram

D. Channel listing

正確答案: C

問題13

Given a protocol analyzer can decrypt WPA2-PSK data packets providing the PSK and SSID are configured in the analyzer software.
When performing packet capture (in a non-FT environment) which frames are required in order for PSK frame decryption to be possible?

A. 4-Way Handshake

B. Reassociation

C. Probe Response

D. Authentication

正確答案: A

說明：（僅 Fast2test 成員可見）

最新的CWNP Certified Wireless Analysis Professional - CWAP-404免費考試真題

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