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CWNP PW0-205 問題集

PW0-205

試験コード:PW0-205

試験名称:Certified wireless analusis professional(cwap)

最近更新時間:2025-09-12

問題と解答:全120問

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質問 1:
How does an access point operating in DCF mode notify a client station operating in Power Save mode of multiple multicast frames queued at the access point?
A. The access point sends the client station a CF-Poll frame with the AID subfield set to the station MAC address.
B. The access point responds to the client station PS-Poll frame with the AID subfield set to a value equal to the number of queued multicast frames.
C. The access point sets the More Data subfield in the Frame Control field of each Data frame to 1 until the last multicast frame is delivered.
D. The access point sets the Beacon DTIM to indicate that it has queued multicast traffic for the client station.
E. The access point sets the Duration field of each Beacon to a value equal to the amount of time it will take to send all of the queued multicast frames to the client station.
正解:C,D

質問 2:
When operating in an 802.11b/g mixed mode environment in which both 802.11b and
802.11g client stations are present and transmitting data on the network, which of the statements below are accurate concerning the 802.11g access point responsibilities in the Basic Service Set?
A. The access point may transmit beacons using a short preamble only if all of the client stations in the BSS have indicated support for short preambles.
B. If beacons are transmitted using short preambles, all associated client stations are required to transmit all data frames using short preambles.
C. The access point will alternate transmitting beacons using long and short preambles so that client stations using either preamble length can associate.
D. The access must transmit beacons using a short preamble in a mixed mode environment. Client stations not supporting short preambles will not be able to associate.
正解:A

質問 3:
There are many wireless LAN scanners on the market such as NetStumbler, Kismet, MacStumbler, and others that can aid in finding the SSID of wireless LANs. In order to defeat the efforts of these scanners, some administrators configure their access points to stop broadcasting SSIDs in Beacons and not to respond to Probes with null (empty) SSID fields. Describe how wireless LAN protocol analyzers can circumvent this so-called
"security" solution.
A. Wireless LAN protocol analyzer software puts the radio card driver into RF Monitor mode. This mode is recognized by access points as privileged, allowing them connectivity when it would otherwise be denied.
B. Wireless LAN protocol analyzers use a special driver, used to operate the card in promiscuous mode. Promiscuous mode is a special mode allowing the radio card to see raw data frames, instead of the filtered data frames that standard mode radio cards see.
C. Wireless LAN protocol analyzers analyze all frames on a wireless LAN. Frame types other than Beacons and Probe Responses carry the SSID information.
D. Wireless LAN protocol analyzers send specialized Probe Requests to which 802.11 compliant access points are required to respond with a Probe Response containing the SSID information.
E. Wireless LAN protocol analyzers using cards from the same manufacturer as the access point will always be able receive the SSID due to the proprietary chipset protocol extensions.
正解:C

質問 4:
The PLCP Protocol Data Unit (PPDU) consists of which three parts?
A. PSDU
B. Header
C. MSDU
D. FCS
E. Trailer
F. Preamble
正解:A,B,F

質問 5:
Which features of a wireless LAN protocol analyzer allow troubleshooters to monitor network events that are happening while the troubleshooters are not watching the analyzer user interface?
A. Peer Map
B. Notifications
C. Node Statistics
D. Alarms
E. Trending Analysis
F. Event Triggers
正解:B,D,F

質問 6:
Which of the following IEEE 802.11 units has a 16-bit frame check sequence (FCS)?
A. 802.11g Announcement Traffic Indication Message (ATIM)
B. 802.11 MAC Protocol Data Unit (MPDU)
C. 802.11b Physical Layer Convergence Protocol (PLCP) header
D. 802.11a MPDU Frame Control field
E. 802.11 Wired Equivalent Privacy (WEP)
正解:C

質問 7:
Which is true of the Association Identifier (AID) used in 802.11 wireless LANs?
A. When bit 16 of the field is zero, the value in bits 15-0 represent the remaining duration of a frame exchange.
B. The least significant 8 bits of this field are used by the wireless client station to identify which bit in a TIM indicates that the access point has frames buffered for the wireless client station.
C. The AID has a maximum value of 2048, and is used to uniquely identify a wireless client station associated with an access point.
D. The AID is used by the access point in DCF mode to reduce duplicate transmissions when sending multicasts.
E. The AID has a maximum value of 2007, and resides in the duration/ID field of a PS-Poll frame only.
正解:E

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CWNP Certified wireless analusis professional(cwap) 認定 PW0-205 試験問題:

1. Given the displayed wireless protocol analyzer trace, which of the following is true?

A) 00:40:96:A1:9A:F9 is a station sending encrypted broadcast data using an encryption key generated by the authenticator.
B) 00:0D:ED:A5:4F:70 is a client station sending unicast data frames to a network node on the wired LAN.
C) Both 00:40:96:A1:9A:F9 and 00:0D:ED:A5:4F:70 are operating in Ad Hoc mode using WPA-compliant 802.1X/EAP authentication.
D) FF:FF:FF:FF:FF:FF is the access point, and data encrypted with static WEP is being sent from a wired station to the wireless station 00:40:96:A1:9A:F9.
E) 00:40:96:A1:9A:F9 is a client station performing a successful 802.1X/EAP reauthentication.


2. XYZ Company is using a single 802.11g access point in their New York branch office.
There are ten 802.11g wireless client stations currently on the network, each used by XYZ full-time employees. XYZ has hired a consultant to work on some accounting problems, and he is using an 802.11b radio card in his laptop. How might this affect XYZ wireless LAN throughput?

A) The network throughput capacity will remain unchanged, but the 802.11b client station will slow access down for the 802.11g stations.
B) There will be no affect on the wireless LAN throughput capacity since the access point talks to each station at the highest rate at which the station is capable of transmitting.
C) The network throughput capacity will decrease slightly since the only change will be that the 802.11b client station will transmit at 11 Mbps instead of 54 Mbps.
D) The network throughput capacity will be greatly decreased, and each 802.11g client station must begin using 20 us slot times.
E) The network throughput capacity will greatly decreased due to mandatory use of DSSS- OFDM modulation.


3. Which of the following descriptions accurately describes IEEE 802.11 compliant Power Save mode operation in a DCF Basic Service Set?

A) After waking from a low power state, client stations listen for the next beacon to determine if sending a PS-Poll frame to the access point is necessary.
B) Following a period of time in a low power state, client stations wake themselves and automatically poll the access point for traffic using a PS-Poll frame.
C) When the access point's buffer is full, the access point wakes all client stations using a PS-Poll frame so that they can receive the data.
D) Upon receiving traffic for a dozing station, the access point wakes the client station using a PS-Poll frame so that the client station can receive the data.
E) After waking at a schedule TBTT, client stations automatically send Null Function frames to the access point with the Power Management bit cleared.


4. Which 802.11g specification calls for the use of PLCP preambles and headers using DBPSK or DQPSK modulation and data payloads using OFDM modulation?

A) ERP-PBCC
B) ERP-OFDM
C) OFDM-CCK
D) ERP-DSSS/CCK
E) DSSS-OFDM


5. What is the duration, in microseconds, of the Slot Time specified by the 802.11a standard?

A) 5 us
B) 20 us
C) 50 us
D) 9 us
E) 10 us


質問と回答:

質問 # 1
正解: A
質問 # 2
正解: D
質問 # 3
正解: A
質問 # 4
正解: E
質問 # 5
正解: D

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