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CWAP-404 Valid Test Camp - Latest CWAP-404 Test Sample

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CWNP certification CWAP-404 exam can give you a lot of change. Such as work, life would have greatly improve. Because, after all, CWAP-404 is a very important certified exam of CWNP. But CWAP-404 exam is not so simple.

CWNP CWAP-404 Exam Certification Details:

Sample Questions
CWNP CWAP-404 Sample Questions

Duration
90 minutes

Passing Score
70%

Exam Name
Wireless Analysis Professional

Exam Code
CWAP-404 CWAP

Number of Questions
60

Recommended Training
CWAP self-paced training kit, Training Class

CWNP CWAP-404 Exam Topics:

Section
Objectives

Protocol Analysis - 15%

Capture 802.11 frames using the appropriate methods
- Select capture devices

Laptop protocol analyzers
APs, controllers, and other management solutions
Specialty devices (hand-held analyzers and custom-built devices)

- Install monitor mode drivers
- Select capture location(s)
- Capture sufficient data for analysis
- Capture all channels or capture on a single channel as needed
- Capture roaming events

Understand and apply the common capture configuration parameters available in protocol analysis tools
- Save to disk
- Packet slicing
- Event triggers
- Buffer options
- Channels and channel widths
- Capture filters
- Channel scanning and dwell time

Analyze 802.11 frame captures to discover problems and find solutions
- Use appropriate display filters to view relevant frames and packets
- Use colorization to highlight important frames and packets
- Configure and display columns for analysis purposes
- View frame and packet decodes while understanding the information shown and applying it to the analysis process
- Use multiple adapters and channel aggregation to view captures from multiple channels
- Implement protocol analyzer decryption procedures
- View and use a capture’s statistical information for analysis
- Use expert mode for analysis
- View and understand peer maps as they relate to communications analysis

Utilize additional tools that capture 802.11 frames for analysis and troubleshooting
- WLAN scanners and discovery tools
- Protocol capture visualization and analysis tools
- Centralized monitoring, alerting, and forensic tools

Ensure appropriate troubleshooting methods are used with all analysis types
- Define the problem
- Determine the scale of the problem
- Identify probable causes
- Capture and analyze the data
- Observe the problem
- Choose appropriate remediation steps
- Document the problem and resolution

Spectrum Analysis - 10%

Capture RF spectrum data and understand the common views available in spectrum analyzers
- Install, configure, and use spectrum analysis software and hardware
- Capture RF spectrum data using handheld, laptop-based, and infrastructure spectrum capture solutions
- Understand and use spectrum analyzer views

Real-time FFT
Waterfall, swept spectrogram, density, and historic views
Utilization and duty cycle
Detected devices
WLAN integration views

Analyze spectrum captures to identify relevant RF information and issues
- RF noise floor in an environment
- Signal-to-Noise Ratio (SNR) for a given signal
- Sources of RF interference and their locations
- RF channel utilization
- Non-Wi-Fi transmitters and their impact on WLAN communications
- Overlapping and non-overlapping adjacent channel interference
- Poor performing or faulty radios

Analyze spectrum captures to identify various device signatures
- Identify various 802.11 PHYs

DSSS
OFDM
OFDMA
Channel widths
Primary channel

- Identify non-802.11 devices based on RF behaviors and signatures

Frequency hopping devices
IoT devices
Microwave ovens
Video devices
RF Jammers
Cordless phones

Use centralized spectrum analysis solutions
- AP-based spectrum analysis
- Sensor-based spectrum analysis

PHY Layers and Technologies - 10%

Understand and describe the functions of the PHY layer and the PHY protocol data units (PPDUs)
- DSSS (Direct Sequence Spread Spectrum)
- HR/DSSS (High Rate/Direct Sequence Spread Spectrum)
- OFDM (Orthogonal Frequency Division Multiplexing)
- ERP (Extended Rate PHY)
- HT (High Throughput)
- VHT (Very High Throughput)
- HE (High Efficiency)

HE SU PPDU
HE MU PPDU
HE ER SU PPDU
HE TB PPDU
HE NULL data packets

Apply the understanding of PHY technologies, including PHY headers, preambles, training fields, frame aggregation, and data rates, to captured data

Identify and use PHY information provided within pseudo-headers in protocol analyzers
- Pseudo-Header formats

Radiotap
Per Packet Information (PPI)

- Key pseudo-header content

Guard intervals
Resource units allocation
PPDU formats
Signal strength
Noise
Data rate and MCS index
Length information
Channel center frequency or received channel
Channel properties

Recognize the limits of protocol analyzers to capture PHY information including NULL data packets and PHY headers

Use appropriate capture devices based on proper understanding of PHY types
- Supported PHYs
- Supported spatial streams

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CWNP Certified Wireless Analysis Professional Sample Questions (Q168-Q173):

NEW QUESTION # 168
Given: The Frame Check Sequence (FCS) is a 32 CRC used for error detection.
The CRC is calculated over what?

A. Frame Body only
B. Mac Header and Frame Body only
C. PHY Header, MAC Header and Frame Body
D. PHY Header and Mac Header only

Answer: B

Explanation:
Explanation
The CRC is calculated over the MAC Header and Frame Body only. The CRC (Cyclic Redundancy Check) is a 32-bit value that is used for error detection in wireless transmissions. The CRC is calculated over the MAC Header and Frame Body of a PSDU, which are the parts of the data unit that contain information such as source and destination addresses, frame type, frame control, sequence number, payload, etc. The CRC is appended to the end of the PSDU as a FCS (Frame Check Sequence) field. The CRC is not calculated over the PHY Header or PHY Preamble, which are parts of the PPDU that contain information such as modulation, coding, data rate, etc. The PHY Header and PHY Preamble are added or removed by the PHY layer during the conversion between PSDU and PPDU. References: [Wireless Analysis Professional Study Guide CWAP-404], Chapter 4: 802.11 Physical Layer, page 97-98

NEW QUESTION # 169
The 802.11r-2008 amendment to the 802.11 specification introduces what new Information Elements (IEs) to facilitate fast BSS transitions? (Choose 2)

A. RSN IE (Robust Security Network)
B. HT IE (High Throughput)
C. DS IE (Distribution System)
D. MD IE (Mobility Domain)
E. FSR IE (Fast Secure Roaming)
F. FT IE (Fast Transition)

Answer: D,F

NEW QUESTION # 170
WMM-PS trigger frames can be what type of IEEE 802.11 frames? (Choose 2)

A. QoS Null
B. PS-Poll
C. QoS Data
D. Reassociation
E. CTS
F. QoS Action

Answer: A,C

NEW QUESTION # 171
Which statements are true regarding frame acknowledgement in an IEEE 802.11 WLAN?
(Choose
3)

A. A client station's Reassociation Request frames are only acknowledged with a Reassociation Response from the access point and not with an ACK frame.
B. Following non-QoS Data frames with the More Fragments bit set to 1, the Duration/ID field of the ACK frame is set to a value equal to two SIFS plus the next Data fragment and its ACK.
C. In an EDCA BSS, encrypted Data frames are only acknowledged by client stations, never by access points.
D. The RA field of ACK frames is always obtained from the Address 2 field in the corresponding frame being acknowledged.
E. Data frame fragments are acknowledged individually (with an ACK frame).
F. Probe request acknowledgement (sending of a Probe Response frame) is configurable in the access point and is always linked to SSID broadcast configuration in Beacons.

Answer: B,D,E

NEW QUESTION # 172
What must occur before an HT STA operating in an EDCA BSS can transmit a data frame over the wireless medium? (Choose 3)

A. Its CCA must report that the medium is idle.
B. The backoff timer for the AC must equal zero.
C. Its NAV must be equal to one.
D. The appropriate interframe space must expire.
E. The AP must issue the STA a TXOP.
F. The STA must receive a BlockAck, resetting the NAV to zero.

Answer: A,B,D

NEW QUESTION # 173
......

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