PW0-104 Wireless LAN Administration Certified Practice Exam Set 3

According to the IEEE 802.11 standard, how much separation is specified between the center frequencies of OFDM (clause 17) channels?


Options are :

  • 22 MHz
  • 10 MHz
  • 11 MHz
  • 20 MHz

Answer : 20 MHz

Given: As your station moves away from the access point to which it is associated, it changes its data rate from 54 Mbps to 48 Mbps and then to 36 Mbps.What IEEE 802.11 term is used to describe this functionality?


Options are :

  • Proximity Rate Handling
  • Rate Set Selectivity
  • Multi-rate Control
  • Dynamic Rate Switching

Answer : Dynamic Rate Switching

PW0-105 Certified Wireless Network Administrator CWNA Exam Set 4

What OSI model layers are specifically addressed by the IEEE 802.11-2007 standard?


Options are :

  • Network
  • Data Link
  • Physical
  • Transport

Answer : Data Link Physical

What mechanism is used to maintain time synchronization in an 802.11 BSS?


Options are :

  • A continuous heartbeat frame (used specifically for time synchronization) is sent from access points to associated stations.
  • Access points synchronize time information from an external time-source using NTP.
  • Stations use ACK frames to regularly reset their internal clock to match that of their AP.
  • When receiving Beacon frames, stations check and correct their clocks using the included timestamp fiel

Answer : When receiving Beacon frames, stations check and correct their clocks using the included timestamp fiel

What factors can significantly influence the application layer throughput of an ERP-OFDM client station in an ERP-OFDM BSS?


Options are :

  • Use of "smart" antenna technology on the ERP-OFDM access point
  • Use of passphrase authentication instead of 802.1X/EAP authentication
  • BSS transition speed between RSN capable access points
  • Number of simultaneous ERP-OFDM clients using the same access point
  • Use of CCMP/AES encryption instead of TKIP/RC4 encryption
  • Association of an HR/DSSS client to the same ERP-OFDM access point as the ERPOFDM client

Answer : Use of "smart" antenna technology on the ERP-OFDM access point Number of simultaneous ERP-OFDM clients using the same access point Association of an HR/DSSS client to the same ERP-OFDM access point as the ERPOFDM client

PW0-104 Wireless LAN Administration Practice Exam Set 2

What information is transmitted in the Beacon management frames of an ERP-OFDM access point for the benefit of nearby HR/DSSS wireless stations?


Options are :

  • Capability Information of the access point
  • Time Synchronization information
  • Encrypted Data
  • Spread Spectrum Parameter Set information

Answer : Capability Information of the access point Time Synchronization information Spread Spectrum Parameter Set information

What are three operational channel widths specified by the 802.11 Clause 20 (High Throughput) PHY?


Options are :

  • 22 MHz
  • PCO
  • 20 MHz
  • 20/40 MHz

Answer : PCO 20 MHz 20/40 MHz

In an 802.11 OFDM Basic Service Set (BSS), what prevents each station from using the full network bandwidth (54 Mbps) when multiple stations are actively transmitting and receiving within the BSS?


Options are :

  • WLAN devices operate in a half duplex medium
  • The queuing buffer memory size of the access point
  • Use of a distributed coordination function containing a backoff algorithm
  • WLAN devices have a default fragmentation threshold value of 2346 bytes

Answer : WLAN devices operate in a half duplex medium Use of a distributed coordination function containing a backoff algorithm

PW0-104 Wireless LAN Administration Certified Practice Exam Set 2

How far apart are the center frequencies of the OFDM channels specified for use in the UNII-2 band (5.25 5.35 GHz)?


Options are :

  • 20 MHz
  • 10 MHz
  • 15 MHz
  • 22 MHz

Answer : 20 MHz

Given: The 802.11-2007 standard often refers to Association and Reassociation frames as a set by saying, "(Re)Association." What is one difference between these two frame types?


Options are :

  • Association frames cannot be used in fast BSS transition.
  • Only the Association frame is used in a heterogeneous (mixed vendor) network.
  • The Reassociation frame contains an additional field called the Current AP Address
  • In a QoS BSS, Association frames carry QoS information while Reassociation frames do not.

Answer : The Reassociation frame contains an additional field called the Current AP Address

How many HR/DSSS channels are specified by the IEEE 802.11-2007 standard, without reference to a specific governmental regulatory domain?


Options are :

  • 14
  • 12
  • 1
  • 11

Answer : 14

PW0-204 Certified Wireless Security Professional (CWSP) Exam Set 3

Given: John configures ten IEEE 802.11 dual-band ERP / OFDM laptops in a conference room for AdHoc wireless networking. One laptop is connected to the Ethernet network, and its Ethernet and WLAN interfaces are bridged. All ten laptops are now able to obtain an IP address from the organization's DHCP server, resolve DNS queries, and reach web servers on the Internet.Is this WLAN an Independent Basic Service Set (IBSS) or an Infrastructure Basic Service Set (BSS)?


Options are :

  • BSS because the laptop with bridged interfaces is acting as an access point
  • BSS because each wireless station has full access to wired network infrastructure services
  • IBSS because the laptop with bridged interfaces does not transmit all of the Beacons
  • IBSS because all laptops are configured for Ad Hoc mode connectivity

Answer : IBSS because all laptops are configured for Ad Hoc mode connectivity

The IEEE 802.11 standard specifies the use of DSSS and OFDM spread spectrum technology for data transmission within the 2.4 GHz ISM band in accordance with regulatory agency requirements of the FCC (US), IC (Canada), and ETSI (Europe). What is the specified frequency range for data transmission within the 2.4 GHz ISM band?


Options are :

  • 2.4010 - 2.4750 GHz
  • 2.4020 2.4950 GHz
  • 2.4000 - 2.4725 GHz
  • 2.4000 - 2.4835 GHz

Answer : 2.4000 - 2.4835 GHz

What conditions can prevent an 802.11 client device from performing a fast BSS transition between two access points that are part of the same WLAN system?


Options are :

  • The client's role-based profile on the WLAN controller does not allow the client to use specific access points on the network.
  • The access points are hiding the SSID in Beacons and Probe Response frames.
  • One access point supports only HR/DSSS, and the other access point is ERP-OFDM capable.
  • One access point has reached its admission control limit.

Answer : The client's role-based profile on the WLAN controller does not allow the client to use specific access points on the network. One access point has reached its admission control limit.

PW0-105 Certified Wireless Network Administrator Exam Set 3

What statements about the Service Set Identifier (SSID) are true?


Options are :

  • The SSID is an alphanumeric value used for identifying a device's manufacturer.
  • The SSID is a mandatory security identifier used only in RSN sessions.
  • The SSID is a logical network name for the devices in a WLAN system.
  • The SSID is an arbitrary number assigned to each AP by each wireless client for roaming purposes only.
  • The SSID is an alphanumeric information field having a value of 0 32 octets.

Answer : The SSID is a logical network name for the devices in a WLAN system. The SSID is an alphanumeric information field having a value of 0 32 octets.

What statements about the 802.11 standard's QoS facility enhancements are true?


Options are :

  • new contention-based channel access method is introduced.
  • Frames with the highest priority access category tend to have the lowest backoff values and therefore they are more likely to get a TXOP.
  • New QoS control frame types are introduced for backwards compatibility with non-QoS capable stations.
  • As long as the Voice queue has data frames awaiting transmission, no data will be transmitted from the Best Effort queue.

Answer : new contention-based channel access method is introduced. Frames with the highest priority access category tend to have the lowest backoff values and therefore they are more likely to get a TXOP.

In an 802.11 ERP-OFDM system, what channel pairs are considered non-overlapping?


Options are :

  • Channels 1 and 4
  • Channels 1 and 10
  • Channels 3 and 7
  • Channels 4 and 10

Answer : Channels 1 and 10 Channels 4 and 10

PW0-104 Wireless LAN Administration Certified Practice Exam Set 1

In an IEEE 802.11 frame, the IP packet is considered by the MAC layer to be a(n) _________.


Options are :

  • PSDU
  • MPDU
  • BPDU
  • MSDU

Answer : MSDU

Given: Unicast data frames are queued at the access point for a dozing station that is operating in IEEE 802.11 legacy (non-QoS) Power Save mode.What actions are part of the process for the station to receive the queued frames?


Options are :

  • The AP retransmits the first queued data frame at a regular interval until the station receives it and sends an acknowledgement.
  • Stations awaken at a predetermined interval.
  • The AP transmits information in Beacons that note which stations have queued frames.
  • Stations request their queued frames from the access point using a PS-Poll frame

Answer : Stations awaken at a predetermined interval. The AP transmits information in Beacons that note which stations have queued frames. Stations request their queued frames from the access point using a PS-Poll frame

Devices compliant with the IEEE 802.11-2007 standard use which radio bands?


Options are :

  • 5.15 5.25 GHz UNII band
  • 5.470 5.725 GHz UNII band
  • 5.725 5.875 GHz ISM band
  • 902 - 928 MHz ISM band

Answer : 5.15 5.25 GHz UNII band 5.470 5.725 GHz UNII band 5.725 5.875 GHz ISM band

PW0-270 Certified Wireless Analysis Professional (CWAP) Exam Set 4

When is an ERP-OFDM access point required by the IEEE 802.11 standard to respond to Probe Request frames from nearby High Throughput (HT) stations?


Options are :

  • When the access point is configured for Open System authentication
  • When the Probe Request frames contain all basic data rates specified by the access point E. When the access point supports only HR/DSSS data rates
  • When the Probe Request frames contain the correct SSID value
  • When the Probe Request frames contain a blank SSID value

Answer : When the Probe Request frames contain the correct SSID value When the Probe Request frames contain a blank SSID value

What carrier sense mechanisms are deployed by the IEEE 802.11-2007 standard that aid in collision avoidance?


Options are :

  • Pseudo-random
  • Passive
  • Active
  • Physical
  • Virtual

Answer : Physical Virtual

Given: A company has several stations connected to a single radio access point, and all stations are actively transmitting and receiving in the BSS.What factors affect the amount of wireless bandwidth available to each station?


Options are :

  • Beacon interval value configured in the access point
  • Distance from the access point to the most distant station
  • Number of actively transmitting stations associated to the access point
  • Co-located access points on non-overlapping channels

Answer : Distance from the access point to the most distant station Number of actively transmitting stations associated to the access point

PW0-270 Certified Wireless Analysis Professional (CWAP) Exam Set 2

Which data rate is supported by 802.11 ERP-OFDM systems that is not supported by 802.11 OFDM systems?


Options are :

  • 9 Mbps
  • 12 Mbps
  • 5.5 Mbps
  • 54 Mbps

Answer : 5.5 Mbps

In an Infrastructure Basic Service Set (BSS), what best describes the Passive Scanning process?


Options are :

  • Stations broadcast Probe Request frames on all channels within the governmental regulatory domain.Nearby access points respond with Probe Response frames. Stations record information found in the Probe Response frames for use in the association process.
  • Access points broadcast Beacons on all channels on each radio within the regulatory domain. Nearby stations record information found in the Beacons for use in the association process.
  • Stations broadcast Beacons on a single channel. Nearby stations record information found in the Beacons for use in the association process.
  • Stations broadcast Probe Request frames on the single channel for which they are programmed. Nearby access points respond on that channel with Probe Response frames. Stations record information found in the Probe Response frames for use in the association process.

Answer : Access points broadcast Beacons on all channels on each radio within the regulatory domain. Nearby stations record information found in the Beacons for use in the association process.

What 802.11 WLAN type implements power management where stations send trigger frames to the AP after they awake from dozing?


Options are :

  • Ad Hoc PSP Mode Set (APMS)
  • Integrated Service Set (ISS)
  • Independent Basic Service Set (IBSS)
  • Extended Service Set (ESS)

Answer : Extended Service Set (ESS)

CWNA-106 Certified Wireless Network Administrator Exam Set 1

What features are defined by the IEEE 802.11-2007 standard for the purpose of satisfying regulatory requirements for 5 GHz operation?


Options are :

  • Transmit Power Control
  • Dynamic Frequency Selection
  • Controlled Access Phasing
  • Distributed Coordination Function
  • Port-based Access Control
  • Frequency Shift Keying

Answer : Transmit Power Control Dynamic Frequency Selection

What steps are part of the 802.11 reassociation process?


Options are :

  • The new access point's Reassociation Service informs the Distribution System that the association is moving.
  • The new access point transmits a Reassociation Response frame to a client station with a status value.
  • The current access point invokes reassociation with the client station.
  • A client station transmits a Reassociation Request frame to its current access point.
  • The current access point informs the Ethernet switch of the reassociation.

Answer : The new access point's Reassociation Service informs the Distribution System that the association is moving. The new access point transmits a Reassociation Response frame to a client station with a status value.

What statements about 802.3-2005, Clause 33 (Power-over-Ethernet) are true?


Options are :

  • Clause 33 compliant Ethernet switches must simultaneously support class 3 powered devices on every powered interface.
  • If a dual-radio access point requires 11 W to operate, a Clause 33 compliant endpoint switch allocates 15.4 W to the powered interface.
  • Class 4 powered devices may use a maximum of 15.4 W of power.
  • Clause 33 compliant endpoint and midspan PSE devices support 10/100/1000Base-T data rates.
  • Clause 33 compliant endpoint PSE devices may source power of 44 57 VDC on the active data wires or the spare copper pairs.

Answer : If a dual-radio access point requires 11 W to operate, a Clause 33 compliant endpoint switch allocates 15.4 W to the powered interface. Clause 33 compliant endpoint PSE devices may source power of 44 57 VDC on the active data wires or the spare copper pairs.

PW0-204 Certified Wireless Security Professional (CWSP) Exam Set 1

Given: You are the network administrator for ABC Company. Your manager has recently attended a wireless security seminar. The seminar speaker insisted that a wireless network could be hidden from potential intruders if you disabled the broadcasting of the SSID in Beacons and configured the access points not to respond to Probe Request frames that have a null SSID field.Your manager asks your opinion about these security practices. How would you respond?


Options are :

  • These security practices prevent manufacturers' client utilities from seeing the SSID. This means that the SSID cannot be obtained, except through social engineering, guessing, or use of WIPS.
  • Broadcasting the SSID in Beacons and allowing access points to respond to Probe Request frames with null SSID fields allows authorized users to easily find and connect to the WLAN, provided they have the correct security credentials.
  • Any tenants in the same building using a wireless intrusion protection system (WIPS) will be able to obtain the SSID by exploiting probe delay timers. This poses a security risk.
  • Any 802.11 protocol analyzer can see the SSID in clear text in frames other than Beacons and Probe Response frames. This negates any benefit of trying to hide the SSID by configuring Beacons and Probe Response frames.

Answer : Broadcasting the SSID in Beacons and allowing access points to respond to Probe Request frames with null SSID fields allows authorized users to easily find and connect to the WLAN, provided they have the correct security credentials. Any 802.11 protocol analyzer can see the SSID in clear text in frames other than Beacons and Probe Response frames. This negates any benefit of trying to hide the SSID by configuring Beacons and Probe Response frames.

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