CWAP-405 Exam Questions Dumps, Selling CWNP Products
CWAP-405 Cert Guide PDF 100% Cover Real Exam Questions
NEW QUESTION # 34
When configuring a long-term, forensic packet capture and saving all packets to disk which of the following is not a consideration?
- A. Individual trace file size
- B. Real-time packet decodes
- C. Analyzer location
- D. Total capture storage space
Answer: B
Explanation:
Real-time packet decodes are not a consideration when configuring a long-term, forensic packet capture and saving all packets to disk. Real-time packet decodes are useful for live analysis and troubleshooting, but they consume CPU and memory resources that could affect the performance of the capture process. For a long- term, forensic packet capture, it is more important to consider the analyzer location, the total capture storage space, and the individual trace file size. These factors affect the quality and quantity of the captured packets and the ease of post-capture analysis34 References:
* CWAP-405Study Guide, Chapter 2: Protocol Analysis, page 49
* CWAP-405Objectives, Section 2.1: Configure protocol analyzers
NEW QUESTION # 35
You are concerned with management overhead in your WLAN. When evaluating the network, you note that each dual-band AP provides for 4 SSIDs in each band with three secure SSIDs and one Open System SSID.
The network runs only 802.11ac APs and uses 20 MHz channels in 2.4 GHz and 400 MHz channels in 5 GHz.
What can you do to reduce the impact of beacon frames on CCI and channel utilization?
- A. Use only 40 MHz channels
- B. Disable SSID broadcasting
- C. Increase the beacon interval
- D. Use the same security across all SSIDs
Answer: B
NEW QUESTION # 36
What is the formula used to calculate the Duration field value in an RTS frame?
- A. RTS Duration field = Data or management frame to be sent duration + CTS duration
- B. RTS Duration field = Data or management frame to be sent duration + CTS duration + one ACK duration + three SIFS
- C. RTS Duration field = CTS duration
- D. RTS Duration field = Data or management to be sent frame duration
Answer: B
NEW QUESTION # 37
You must report on frame types seen on the WLAN. You want to list the frame types by both name and binary value.
What frame type is represented by the binary value 011010, which includes the Type and Subtype values?
- A. Authentication
- B. Beacon
- C. Association Request
- D. PS-Poll
Answer: D
Explanation:
References:
NEW QUESTION # 38
You have implemented centralized, infrastructure-based spectrum analysis. The Aps are configured to perform spectrum analysis in an ad-hoc manner and will go offline as Aps to perform this duty when needed.
What unique method of spectrum analysis monitoring is provided by this solution that is not typically available in a laptop-based analyzer?
- A. Real-time FFT
- B. Web-based viewing
- C. RBW adjustments
- D. Band selection
Answer: C
NEW QUESTION # 39
Given: Protocol analyzer often have useful graphical dashboards providing information about the health and operations of the WLAN.
What is a valid use of a graph showing the Top APs Based on Active Associations?
- A. Ensuring compliance with corporate security policies
- B. Locating overloaded APs
- C. Evaluating the capacity handling on a specific channel
- D. Discovering the total number of client STAs on your network
Answer: B
NEW QUESTION # 40
What element was added to the general frame of 802.11 with the 802.11e amendment and the 802.11-2007 rollup?
- A. Address 4
- B. HT Control
- C. RSN-IE
- D. QoS Control
Answer: D
NEW QUESTION # 41
Which one of the following is not an 802.11 Management frame?
- A. Authentication
- B. Beacon
- C. PS-Poll
- D. Action
Answer: C
Explanation:
A PS-Poll (Power Save Poll) frame is not an 802.11 management frame. A PS-Poll frame is a type of control frame that is used by a STA in power save mode to request data frames from an AP. A STA in power save mode can conserve battery power by periodically sleeping and waking up. When a STA sleeps, it cannot receive any data frames from the AP, so it informs the AP of its power save status by setting a bit in its MAC header. The AP then buffers any data frames destined for the sleeping STA until it wakes up. When a STA wakes up, it sends a PS-Poll frame to the AP, indicating its association ID and requesting any buffered data frames. The AP then responds with one or more data frames, followed by an ACK or BA frame from the STA. The other options are not correct, as they are types of 802.11 management frames. An Action frame is used to perform various management actions, such as spectrum management, QoS management, radio measurement, etc. A Beacon frame is used to advertise the presence and capabilities of an AP or BSS. An Authentication frame is used to establish or terminate an authentication relationship between a STA and an AP. References: [Wireless Analysis Professional Study Guide CWAP-405], Chapter 6: 802.11 Frame Exchanges, page 169-170
NEW QUESTION # 42
You have been asked to recommend a protocol analysis solution that uses open source software and works with the Linux platform. It must provide decoding of 802.11ac frames and minimal support for reporting and statistics.
What solution would you recommend?
- A. OmniPeek
- B. Wi-Fi Analyzer Pro
- C. CommView for Wi-Fi
- D. Wireshark
Answer: D
NEW QUESTION # 43
How does a VoIP Phone, using WMM Power Save, request data frames buffered at the AP?
- A. The VoIP phone transmits a WMM Action frame
- B. The VoIP phone transmits a trigger frame, which is a QoS Null frame or a QoS Data frame
- C. The VoIP phone transmits a PS-Poll frame
- D. The VoIP phone sets the More Data bit in the MAC Header to 1
Answer: B
Explanation:
A VoIP phone, using WMM Power Save, requests data frames buffered at the AP by transmitting a trigger frame, which is a QoS Null frame or a QoS Data frame. WMM Power Save is a power saving mode that allows a STA (station) to conserve battery power by periodically sleeping and waking up. WMM Power Save is based on WMM (Wi-Fi Multimedia), which is a QoS (Quality of Service) enhancement that provides prioritized and differentiated access to the medium for different types of traffic. When a STA sleeps, it cannot receive any data frames from the AP, so it informs the AP of its power save status by setting a bit in its MAC header. The AP then buffers any data frames destined for the sleeping STA until it wakes up. When a STA wakes up, it sends a trigger frame to the AP, indicating its AC (Access Category), which is a logical queue that corresponds to its QoS level. A trigger frame can be either a QoS Null frame or a QoS Data frame, depending on whether it has any payload or not. The AP then responds with one or more data frames from the same AC as the trigger frame, followed by an ACK or BA (Block Acknowledgement) frame from the STA.
The other options are not correct, as they are not used by a VoIP phone using WMM Power Save to request data frames buffered at the AP. A PS-Poll (Power Save Poll) frame is used by a STA using legacy power save mode, not WMM Power Save mode, to request data frames buffered at the AP. A PS-Poll frame does not indicate any AC or QoS information. Setting the More Data bit in the MAC header to 1 does not request any data frames from the AP, but indicates that there are more data frames to be sent by the STA or received by the STA. Transmitting a WMM Action frame does not request any data frames from the AP, but performs various management actions related to WMM features, such as admission control, parameter update, etc. References: [Wireless Analysis Professional Study Guide CWAP-405], Chapter 7: QoS Analysis, page
198-199
NEW QUESTION # 44
Finish the statement:
It is possible to distinguish between_______22 MHz transmissions and________20 MHz transmissions when looking at an FFT plot.
- A. HR/DSSS and ERP
- B. HT and VHT
- C. OFDM and HT
- D. ERP and VHT
Answer: C
Explanation:
It is possible to distinguish between OFDM 20 MHz transmissions and HT 20 MHz transmissions when looking at an FFT plot. OFDM and HT are two different modulation schemes used by 802.11 WLANs.
OFDM is used by legacy 802.11a/g devices, while HT is used by newer 802.11n/ac devices. OFDM and HT have different spectral characteristics that can be observed on an FFT plot. OFDM transmissions have a flat spectrum with sharp edges, while HT transmissions have a tapered spectrum with rounded edges. This is because HT uses guard intervals and cyclic prefixes to reduce inter-symbol interference and improve performance. The other options are not correct, as they do not describe different modulation schemes or channel widths that can be distinguished on an FFT plot. References: [Wireless Analysis Professional Study Guide CWAP-405], Chapter 3: Spectrum Analysis, page 70-71
NEW QUESTION # 45
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 the basic data rates
- C. They are 5 GHz-only devices
- D. They do not support VHI and only support OFDM
Answer: C
NEW QUESTION # 46
You are troubleshooting VoIP WLAN issues. When performing a PING to a remote device that would be involved in a call link, you see that the time value averages 220 milliseconds.
How much extra delay beyond that recommend for VoIP links is in this link?
- A. There is 80 milliseconds more delay than recommended
- B. There is not enough information because the PING command give round-trip-times
- C. There is 70 milliseconds more delay than recommended
- D. There is no extra delay beyond that recommended, instead there is 80 milliseconds less
Answer: D
NEW QUESTION # 47
What is used to respond with an uplink transmission to an MU-RTS trigger frame in the 802.11ax PHY?
- A. HE TB PPDU
- B. VHT PPDU
- C. HE SU PPDU
- D. HE MU PPDU
Answer: A
Explanation:
An HE TB PPDU (High Efficiency Trigger-Based Packet Data Unit) is used to respond with an uplink transmission to an MU-RTS trigger frame in the 802.11ax PHY (Physical Layer). An MU-RTS trigger frame is a frame that initiates a multi-user transmission opportunity (MU-TXOP) by requesting multiple stations (STAs) to send clear-to-send (CTS) frames on different spatial streams or resource units (RUs). An HE TB PPDU is a frame that contains data from multiple STAs that have been allocated RUs by an MU-RTS trigger frame or another type of trigger frame. An HE SU PPDU (High Efficiency Single User Packet Data Unit) is a frame that contains data from a single STA using all available spatial streams or RUs. An HE MU PPDU (High Efficiency Multi User Packet Data Unit) is a frame that contains data from multiple STAs using different spatial streams or RUs without being triggered by another frame. A VHT PPDU (Very High Throughput Packet Data Unit) is a frame that uses the 802.11ac PHY and does not support multi-user transmissions.
References:
CWAP-405Study Guide, Chapter 3: 802.11 MAC Layer Frame Formats and Technologies, page 101 CWAP-405Objectives, Section 3.4: Analyze multi-user transmissions CWAP-405Study Guide, Chapter 3: 802.11 MAC Layer Frame Formats and Technologies, page 99
NEW QUESTION # 48
VoIP is used heavily in your organization. You must troubleshoot problems with dropped calls on the WLAN.
What is a common cause of dropped calls when using Wi-Fi VoIP phones?
- A. Slow roaming
- B. Use of WMM
- C. Data rates below 54 Mbps
- D. Data rates below 75 Mbps
Answer: A
NEW QUESTION # 49
You have received reports of performance problems in a BSS. One specific user is indicating that her downloads are taking a very long time compared to other users around her. You want to determine if the AP is sending frames multiple times to get through to the user's computer.
Where should you monitor with the protocol analyzer to see retries from the AP in this scenario?
- A. Very near the client STA
- B. Capture from another AP in another BSS
- C. Very near the AP
- D. Directly in the middle of the AP and client STA
Answer: C
NEW QUESTION # 50
As the WLAN engineer in your organization, you must troubleshoot performance problems related to co- channel interference (CCI).
What is a good measurement of CCI impact in addition to the number of APs seen on a channel?
- A. The frequency used
- B. Utilization
- C. Retries
- D. Non-Wi-Fi device count
Answer: A
NEW QUESTION # 51
Where, in a protocol analyzer, would you find an indication that a frame was transmitted as part of an A- MPDU?
- A. The Aggregation flag in the Radio Tap Header
- B. A-MPDU flag in the QoS Control Field
- C. A-MPDU flag in the Frame Control Field
- D. The HT Operation Element
Answer: A
Explanation:
In a protocol analyzer, you would find an indication that a frame was transmitted as part of an A-MPDU by looking at the Aggregation flag in the Radio Tap Header. The Radio Tap Header is a pseudo-header that is added by some wireless capture devices to provide additional information about the physical layer characteristics of a frame. The Aggregation flag is one of the fields in this header, and it indicates whether the frame belongs to an A-MPDU or not. If the flag is set to 1, it means that the frame is part of an A-MPDU; if it is set to 0, it means that the frame is not part of an A-MPDU . References: CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 9: PHY Layer Frame Formats and Technologies, page 303; CWAP-405Certified Wireless Analysis Professional Study and Reference Guide, Chapter 9: PHY Layer Frame Formats and Technologies, page 304.
NEW QUESTION # 52
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. Real-time FFT
- B. Device listing
- C. Swept spectrogram
- D. Channel listing
Answer: C
Explanation:
The FFT shows spectral activity in the frequency domain, while waterfall or swept spectrogram views attempt to represent RF activity over time
NEW QUESTION # 53
You are analyzing a problem with a specific client adapter. The vendor specifications sheet does not provide detailed information.
What tool can you use to provide the most detailed specification information in many such cases?
- A. Wi-Fi finder
- B. FCC ID Search
- C. WLAN controller
- D. Spectrum analyzer
Answer: B
NEW QUESTION # 54
A PHY Header is added to the PSDU at which layer?
- A. Network
- B. LLC
- C. PHY
- D. MAC
Answer: C
Explanation:
A PHY header is added to the PSDU at the PHY layer. A PHY header is a part of the PPDU that contains information such as modulation, coding, and data rate. The PHY header is added by the PHY layer when it converts a PSDU to a PPDU for transmission, or removed by the PHY layer when it converts a PPDU to a PSDU for reception. The other layers do not add or remove a PHY header. References: [Wireless Analysis Professional Study Guide CWAP-405], Chapter 4: 802.11 Physical Layer, page 97-98
NEW QUESTION # 55
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