CWNP CWNP CWAP-405 PDF CWNP CWNP CWAP-405 PDF Questions Available Here at: https://www.certification-exam.com/en/study-guides/cwnp-exam/cwap-405- questions/quiz.html Enrolling now you will get access to 465 questions in a unique set of CWNP CWAP-405 Question 1 During a WPA2 capture, a wireless analyst observes that each client has a distinct key for unicast traffic, while multicast and broadcast frames use a key shared by associated clients. Which key-management behavior explains this observation? Options: A. The AP derives a separate Group Temporal Key for every client and uses a single Pairwise Master Key for broadcast traffic B. The 4-way handshake derives a Pairwise Transient Key for each client, while the AP distributes a shared Group Temporal Key for group traffic C. The authentication server provides one Pairwise Transient Key to all clients, while each client independently derives its own Group Temporal Key D. The AP uses the Pairwise Master Key directly for unicast traffic and derives a new Group Temporal Key for every transmitted frame Answer: B Explanation: The 4-way handshake uses the PMK and handshake values to derive a unique PTK for each client, protecting unicast traffic. The AP distributes a GTK to associated stations for multicast and broadcast traffic, so that traffic uses a shared group key rather than a per-client key. Question 2 During an 802.11 troubleshooting session, an analyst must capture management, control, and data frames exchanged by multiple stations, including frames not addressed to the analyzer. The capture adapter is near the affected WLAN, and the analyst wants to avoid missing exchanges while the analyzer changes CWNP CWNP CWAP-405 PDF https://www.certification-exam.com/ channels. Which configuration is most appropriate? Options: A. Use promiscuous mode on the associated client interface and allow automatic channel hopping B. Use monitor mode with the adapter locked to the channel used by the affected WLAN C. Capture on the access point's wired interface while filtering for the WLAN's SSID D. Use an Ethernet capture adapter in full-duplex mode connected to the switch uplink Answer: B Explanation: Monitor mode allows the adapter to receive raw 802.11 frames observed over the air, including frames not addressed to the analyzer. Locking the adapter to the target channel prevents channel hopping from creating gaps in the capture. An associated client interface, a wired capture, or an Ethernet adapter cannot provide the same over-the-air view of all WLAN frame exchanges. Question 3 A packet capture shows a station receiving a CTS frame and then transmitting the DATA frame after a short interframe interval. The receiver sends an ACK after another short interframe interval. Which interpretation best explains this sequence? Options: A. The station used DIFS before DATA, and the receiver used EIFS before ACK B. The station used SIFS before DATA, and the receiver used SIFS before ACK C. The station used PIFS before DATA, and the receiver used DIFS before ACK D. The station used EIFS before DATA, and the receiver used PIFS before ACK Answer: B Explanation: A CTS-to-DATA exchange and the DATA-to-ACK response are coordinated parts of the same 802.11 transmission sequence, so SIFS is used between these frames. DIFS is used before a new contention- based transmission, while PIFS and EIFS apply in different access or recovery situations. Question 4 A client successfully completes open-system authentication with an access point, but it has not yet exchanged an Association Request and Association Response. The client then attempts to send normal data traffic. Which statement best describes the client's 802.11 state and the expected result? Options: CWNP CWNP CWAP-405 PDF https://www.certification-exam.com/ A. The client is authenticated and associated, so normal data exchange should proceed B. The client is unauthenticated but associated, so only management traffic is permitted C. The client is authenticated but unassociated, so normal data exchange cannot begin D. The client is in the roaming state, so data is buffered until reassociation completes Answer: C Explanation: Successful authentication moves the station to the authenticated but unassociated state. The station must complete the association exchange before it can use the data service with the access point. Authentication alone does not establish an association, and roaming is not implied by this sequence. Question 5 A client uses RTS/CTS before transmitting a unicast data frame to an access point. After the access point successfully receives the RTS, which response and subsequent exchange correctly describe the protected transmission? Options: A. The access point sends CTS, the client sends DATA, and the access point returns ACK B. The access point sends ACK, the client sends CTS, and the access point returns DATA C. The access point sends DATA, the client sends ACK, and the access point returns CTS D. The access point sends CTS, the client sends ACK, and the access point returns DATA Answer: A Explanation: In an RTS/CTS exchange, the intended receiver answers a valid RTS with CTS, reserving the medium for the stated transmission duration. The sender then transmits the DATA frame, and the receiver acknowledges successful reception with an ACK. An ACK does not replace CTS, and DATA is sent by the RTS sender rather than the access point. Question 6 An 802.11 WLAN uses EDCA, and a voice frame and a best-effort frame become ready at nearly the same time. Assuming both stations have comparable signal conditions and no transmission is already in progress, which mechanism gives the voice frame a higher probability of gaining access to the medium first? Options: A. The voice access category uses a longer AIFS and a larger contention window CWNP CWNP CWAP-405 PDF https://www.certification-exam.com/ B. The voice access category uses a shorter AIFS and typically a smaller contention window C. The best-effort access category defers only after detecting a voice frame D. The voice access category bypasses carrier sensing before transmitting Answer: B Explanation: EDCA provides differentiated access by assigning higher-priority access categories shorter arbitration interframe spaces and typically smaller contention windows. These settings reduce the voice category's expected waiting time, while it still performs carrier sensing and contention rather than bypassing it. Question 7 A packet capture from a WPA2-Enterprise WLAN shows successful association, an EAP-Request/Identity exchange, and a RADIUS Access-Reject followed by an EAP-Failure. The four-way handshake never begins. What is the most defensible conclusion? Options: A. The client and access point failed to derive matching pairwise transient keys B. The authentication server rejected the client's credentials or authentication policy C. The client received an invalid group key during the protected handshake D. The access point detected a replay-protection failure in the data traffic Answer: B Explanation: A RADIUS Access-Reject followed by EAP-Failure indicates that backend authentication was denied before the WPA2 four-way handshake could start. Key-derivation, group-key, and replay-protection problems occur later, after successful 802.1X authentication and commencement of protected key establishment. Question 8 A WLAN packet capture begins after a client has joined an access point and contains valid encrypted unicast data frames exchanged between them, but no EAPOL frames are present. Assuming the capture filter includes EAPOL traffic, which conclusion is best supported? Options: A. The access point rejected the client's authentication credentials B. The capture likely began after the security handshake had completed C. The client never completed association with the access point D. The network was operating without 802.11 security CWNP CWNP CWAP-405 PDF https://www.certification-exam.com/ Answer: B Explanation: Valid encrypted data frames indicate that the client and access point had already established the security context needed for protected communication. If EAPOL traffic was included in the capture but none appears, the most likely explanation is that the capture started after the authentication and key- management exchange had completed. The absence of EAPOL alone does not prove authentication failure or an open network. Question 9 A WLAN analyzer captures a short frame sent by a power-saving station to its associated AP after the station detects its AID in the TIM. The frame carries no data payload and is identified as a PS-Poll frame. How should this frame be classified and interpreted? Options: A. A management frame used to renegotiate the station's association B. A control frame used by the station to request buffered unicast data C. A data frame that confirms successful delivery of buffered traffic D. An acknowledgment frame sent in response to the AP's beacon Answer: B Explanation: A PS-Poll is a control frame used by a legacy power-saving station to request delivery of buffered unicast data from its associated AP after the TIM indicates pending traffic. It is not a management frame, does not carry the requested data itself, and is not an acknowledgment of a beacon. Question 10 During a high-density WLAN capture, an AP detects a transmission from an overlapping BSS on the same channel. The overlapping PPDU has a different BSS color and its received power is below the configured OBSS packet-detection threshold. Assuming other MAC rules permit transmission, which 802.11ax capability allows the AP to reuse the channel rather than defer solely because of that overlapping transmission? Options: A. OFDMA resource-unit scheduling B. BSS coloring with OBSS packet-detection-based spatial reuse C. Downlink multi-user MIMO D. VHT transmit opportunity bursting CWNP CWNP CWAP-405 PDF https://www.certification-exam.com/ Answer: B Explanation: 802.11ax uses BSS coloring to identify transmissions from other BSSs and can apply an OBSS packet- detection threshold to support spatial reuse when the overlapping signal is sufficiently weak. OFDMA divides a transmission into resource units, MU-MIMO uses spatial streams, and TXOP bursting controls frame exchanges within a transmit opportunity; none of those mechanisms directly determines whether a weak overlapping BSS transmission may be ignored for channel access. Would you like to see more? 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