Valid CWNP CWAP-404 Exam Voucher & Free CWAP-404 Updates

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Free CWAP-404 Updates - Exam CWAP-404 Quiz

With the CWNP CWAP-404 certification exam you will get an opportunity to learn new and in-demand skills. In this way, you will stay updated and competitive in the market and advance your career easily. To do this you just need to pass the Certified Wireless Analysis Professional CWAP-404 Certification Exam.

CWNP CWAP-404 Exam Certification Details:

Exam Name	Wireless Analysis Professional
Passing Score	70%
Sample Questions	CWNP CWAP-404 Sample Questions
Exam Code	CWAP-404 CWAP
Recommended Training	CWAP self-paced training kit, Training Class

CWNP Certified Wireless Analysis Professional Sample Questions (Q100-Q105):

NEW QUESTION # 100
What is an AIFS?

A. A medium access method introduced by 802.11n, but never implemented
B. The shortest period of time a STA can sleep
C. A variable Interframe Space introduced by 802.11e to help prioritize medium access for different Access Categories
D. A form of aggregation performed at the PLCP sub-layer

Answer: C

Explanation:
An AIFS is a variable interframe space introduced by 802.11e to help prioritize medium access for different Access Categories (ACs). An interframe space is a period of time that a STA (station) has to wait before attempting to access the medium. An AIFS is a type of interframe space that varies depending on the AC of the traffic. An AC is a logical queue that corresponds to a QoS (Quality of Service) level for different types of traffic. There are four ACs defined by 802.11e:
AC_VO (Voice), AC_VI (Video), AC_BE (Best Effort), and AC_BK (Background). Each AC has a different AIFSN (Arbitration Interframe Space Number) value, which determines how long it has to wait before attempting to access the medium. A lower AIFSN value means a higher priority and a shorter waiting time. The other options are not correct, as they do not describe what an AIFS is.
An AIFS is not a medium access method introduced by 802.11n, but never implemented, as it is part of the 802.11e standard and widely used in QoS-enabled WLANs. An AIFS is not a form of aggregation performed at the PHY layer based on 802.11e UP values interpreted from DSCP values, as aggregation is a technique that combines multiple frames into one larger frame to improve efficiency and throughput, not prioritization or medium access. An AIFS is not the shortest period of time a STA can sleep, as sleeping is a power saving mode that allows a STA to conserve battery power by periodically turning off its radio, not accessing the medium.

NEW QUESTION # 101
You are using a Wireless Aggregator utility to combine multiple packet captures.
One capture exists for each of channels 1, 6 and 11.
What kind of troubleshooting are you likely performing with such a tool?

A. Fast secure roaming problems.
B. Wireless adapter failure analysis.
C. Narrowband DoS attack detection.
D. Interference source location.

Answer: D

NEW QUESTION # 102
How many frames make up the Group Key Handshake excluding any Ack frames that may be required?

A. 0
B. 1
C. 2
D. 3

Answer: D

Explanation:
The Group Key Handshake consists of two frames excluding any Ack frames that may be required. The Group Key Handshake is used to distribute and update the Group Temporal Key (GTK) for encrypting broadcast and multicast traffic. The AP initiates the Group Key Handshake by sending a Group Key Message 1 frame to a STA, which contains the new GTK and other information. The STA responds with a Group Key Message 2 frame to the AP, which confirms the receipt of the GTK and other information. After this, both the AP and the STA can use the new GTK for encryption and decryption of broadcast and multicast traffic.

NEW QUESTION # 103
What Interframe space would be expected between a CTS and a Data frame?

A. DIFS
B. AIFS
C. SIFS
D. PIFS

Answer: C

Explanation:
The interframe space that would be expected between a CTS (Clear to Send) and a Data frame is SIFS (Short Interframe Space). A SIFS is the shortest interframe space that is used for high- priority transmissions, such as ACKs (Acknowledgements), CTSs, or data frames that are part of a fragmentation or aggregation process. A SIFS is a fixed value that depends on the PHY type and channel width. A CTS and a Data frame are part of a virtual copyright sense mechanism called RTS/CTS (Request to Send/Clear to Send), which is used to avoid collisions and hidden node problems in wireless transmissions. When a STA (station) wants to send a data frame, it first sends an RTS frame to the intended receiver, indicating the duration of the transmission. The receiver then responds with a CTS frame, also indicating the duration of the transmission. The other STAs in the vicinity hear either the RTS or the CTS frame and update their NAV (Network Allocation Vector) timers accordingly, deferring their access to the medium until the transmission is over. The sender then sends the data frame after waiting for a SIFS, followed by an ACK frame from the receiver after another SIFS. The other options are not correct, as they are not used between a CTS and a Data frame. A PIFS (PCF Interframe Space) is used for medium access by the PCF (Point Coordination Function), which is an optional and rarely implemented polling-based mechanism that provides contention-free service for time-sensitive traffic. An AIFS (Arbitration Interframe Space) is used for medium access by different ACs (Access Categories), which are logical queues that correspond to different QoS (Quality of Service) levels for different types of traffic. An AIFS is a variable interframe space that depends on the AIFSN (Arbitration Interframe Space Number) value of each AC. A DIFS (Distributed Interframe Space) is used for medium access by the DCF (Distributed Coordination Function), which is the default and mandatory contention-based mechanism that provides best-effort service for normal traffic.

NEW QUESTION # 104
The PHY layer provides framing by adding a header to create what type of data unit?

A. PPDU
B. PSDU
C. MSDU
D. MPDU

Answer: A

Explanation:
Explanation
The PHY layer provides framing by adding a header to create a PPDU. A PPDU (PHY Protocol Data Unit) is the data unit that is transmitted or received over the wireless medium by the PHY layer. A PPDU consists of a PSDU (PHY Service Data Unit) and a PHY header, which contains information such as modulation, coding, and data rate. The PHY layer adds the PHY header to the PSDU to create a PPDU for transmission, or removes the PHY header from the PPDU to extract the PSDU for reception. The other options are not correct, as they are not created by adding a header at the PHY layer. An MPDU (MAC Protocol Data Unit) is created by adding a MAC header and FCS to an MSDU (MAC Service Data Unit) at the MAC layer. An MSDU is the data unit that is passed from the LLC sublayer to the MAC sublayer or vice versa. References: [Wireless Analysis Professional Study Guide CWAP-404], Chapter 4: 802.11 Physical Layer, page 97-98

NEW QUESTION # 105
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VALID CWNP CWAP-404 EXAM VOUCHER & FREE CWAP-404 UPDATES

Valid CWNP CWAP-404 Exam Voucher & Free CWAP-404 Updates