PW0-104 Wireless LAN Administration Certified Practice Exam Set 4

What device feature is user configurable for RSN-capable 802.11 WLAN client devices?


Options are :

  • CCMP Configuration Parameters
  • EAP Authentication Type
  • SNMP Community Strings
  • WMM Priority Tagging
  • RADIUS Server IP Address

Answer : EAP Authentication Type

Select the answer that accurately describes an 802.11 Clause 20 High Throughput (HT) operational mode.


Options are :

  • Mode 1: Used if there are non-HT stations or APs using the primary or secondary channels. Called "HT non-member protection mode".
  • Mode 3: Used if only HT stations are associated in the BSS and at least one 20 MHz HT station is associated.
  • Mode 0: Used if one or more non-HT stations are associated in the BSS. Called "HT mixed mode"
  • Mode 2: Used if all stations in the BSS are 20/40 MHz HT capable, or if the BSS is 20/40 MHz capable,or if all stations in the BSS are 20 MHz HT stations in a 20 MHz BSS.

Answer : Mode 1: Used if there are non-HT stations or APs using the primary or secondary channels. Called "HT non-member protection mode".

PW0-270 Certified Wireless Analysis Professional (CWAP) Exam Set 6

Given: You have been hired as a consultant to troubleshoot a performance problem with an 802.11 ERP network. You begin troubleshooting by finding a WLAN client device that is experiencing throughput problems and viewing its 802.11 frame exchanges in an 802.11 protocol analyzer. The retransmission rate is 40% instead of the company's baseline of 3%.How should you proceed in further troubleshooting this problem?


Options are :

  • Use a laptop-based site survey planning and analysis tool to optimize AP placement.
  • Use a protocol analyzer to look for increased reassociations due to a low roaming threshold.
  • Use a protocol analyzer to look for MAC layer DoS attacks such as EAPoL-Start floods.
  • Use a spectrum analyzer to look for a 2.4 GHz RF source with a high duty cycle value.
  • Use a spectrum analyzer to look for a noise floor value significantly higher than -95 dBm.

Answer : Use a spectrum analyzer to look for a 2.4 GHz RF source with a high duty cycle value. Use a spectrum analyzer to look for a noise floor value significantly higher than -95 dBm.

The IEEE 802.11-2007 standard specifies which channel access methods as a part of the Hybrid Coordination function?


Options are :

  • EDCA
  • HCCA
  • PCFA
  • HDCF

Answer : EDCA HCCA

The IEEE 802.11-2007 standard specifies which features for strong security?


Options are :

  • CCMP Cipher Suite
  • 802.1X/EAP
  • SSID Hiding
  • EAP-TTLS

Answer : CCMP Cipher Suite 802.1X/EAP

CWNA-106 Certified Wireless Network Administrator Exam Set 3

What statement describes the use of communication protocols between WLAN controllers and lightweight access points (APs)?


Options are :

  • All vendors support simultaneous L2 and L3 protocol connectivity between the WLAN controller and lightweight APs.
  • All vendors support L3 (IP) tunneling between WLAN controllers and lightweight APs.
  • Some vendors use proprietary protocols, and some vendors use protocols based on public standards like RFCs.
  • All vendors support the use of VRRP, which allows lightweight APs to connect to a backup controller in case the primary fails.
  • All vendors use the same protocol so that APs will interoperate with all WLAN controllers.

Answer : All vendors support L3 (IP) tunneling between WLAN controllers and lightweight APs. Some vendors use proprietary protocols, and some vendors use protocols based on public standards like RFCs.

When using 802.3-2005, Clause 33 compliant Power-over-Ethernet switches at the network edge, what situation has the potential to adversely affect the proper operation of your Clause 33 compliant access points?


Options are :

  • The Ethernet switch's uplink ports are not connected to a Clause 33 compliant core or Distribution Ethernet switch.
  • Access points that do not support Clause 33 requirements are attached to the same Ethernet switch.
  • PoE is provided on both 10/100 and 1000BaseTx ports on the same Ethernet switch.
  • A large number of Clause 33 compliant VoIP phones are attached to the same Ethernet switch.

Answer : A large number of Clause 33 compliant VoIP phones are attached to the same Ethernet switch.

Given: Joe runs a coffee shop, and as a value added service for his customers he has implemented a Wi-Fi hotspot. Joe has read news articles about how hackers lurk at hotspots trying to take advantage of unsuspecting users. Joe wants to avoid this problem at his coffee shop.What is the most efficient step that Joe can take to prevent hackers from attacking his customers' wireless computers at his coffee shop?


Options are :

  • Configure Role Based Access Control (RBAC) features in the WLAN controller
  • Give out a CD to each customer with free firewall software
  • Enable station-to-station traffic blocking in the WLAN controller
  • Authorize Network Admission Control (NAC) functionality in the WLAN controller

Answer : Enable station-to-station traffic blocking in the WLAN controller

PW0-104 Wireless LAN Administration Practice Exam Set 2

Given: ABC Company has a 2-story building and one WLAN controller with six lightweight APs. The WLAN controller currently provides coverage to 75% of both floors and an adequate amount of capacity for all client devices. The network manager has decided that ABC Company needs 100% coverage, and the existing WLAN controller will not support any additional APs. The Engineering team is moving upstairs and the Sales team is moving downstairs to keep everyone organized and efficient. There will be an occasional need for members of the Engineering team to work downstairs and for the Sales team to work upstairs, and each team is increasing in size by 10% over the next month.What is the most cost effective upgrade solution that will yield: 1) Continued support of fast/secure roaming between APs 2) Added network capacity to accommodate the 10% growth 3) 100% coverage on both floors of the facility


Options are :

  • Turn up the power to all lightweight APs and move the APs to suitable locations to provide 100% coverage. Leave the WLAN controller configured for a single subnet.
  • Replace the existing WLAN controller with a larger WLAN controller and add additional APs.Configure two WLAN profiles in the WLAN controller, but continue to use a single subnet.
  • Buy a second WLAN controller with additional lightweight APs. Use one WLAN controller for upstairs and the other for downstairs. Put each WLAN controller on its own subnet.
  • Add autonomous APs where needed to complete coverage. Configure the autonomous APs for preauthentication support and the same SSID used by the WLAN controller. Autonomous APs should be on the same subnet with the WLAN controller.

Answer : Replace the existing WLAN controller with a larger WLAN controller and add additional APs.Configure two WLAN profiles in the WLAN controller, but continue to use a single subnet.

What mechanisms are specified by the IEEE 802.11-2007 standard to assure that only one radio is transmitting on the RF medium at a given point in time?


Options are :

  • Random backoff timer
  • Interframe spacing
  • Clear channel assessment
  • Network allocation vector

Answer : Random backoff timer Clear channel assessment Network allocation vector

In a single channel architecture (SCA) WLAN system, 802.11n (High Throughput) APs should not share an ESSID with 802.11g (ERP-OFDM) APs because _________.


Options are :

  • The additional beacon material would confuse 802.11b/g client stations
  • 802.11n APs use 40 MHz channels, while 802.11g APs use 20 MHz channels
  • The added range of 802.11n APs would cause co-channel interference
  • Client stations could lose services as they roam between APs with the same BSSID

Answer : Client stations could lose services as they roam between APs with the same BSSID

PW0-105 Certified Wireless Network Administrator CWNA Exam Set 4

If an 802.11 RF signal reaches a receiving antenna simultaneously by direct and indirect (reflected) paths, what effect might the reflected signal have on the signal that took the direct line-of-sight path?


Options are :

  • The direct signal will not be received if the indirect signal is greater than 90 out-ofphase
  • Adjacent channel interference will occur. The interference creates distortion of the signal, rendering it corrupt and unreadable.
  • The direct signal will be attenuated if the indirect signal arrives simultaneously at the receiver, but 90 out-of-phase.
  • The direct signal will be amplified. The amplification results in a signal that is stronger at the receiving antenna than was originally transmitted.

Answer : The direct signal will be attenuated if the indirect signal arrives simultaneously at the receiver, but 90 out-of-phase.

An ERP-OFDM access point can control use of the RF medium for a specified period of time using which of the listed components of the IEEE 802.11-2007 standard?


Options are :

  • Protection Mechanisms
  • Probe Request frames
  • DTIM Interval
  • Long Slot Times
  • RTS-to-Self

Answer : Protection Mechanisms

In a point-to-multipoint bridge environment where 802.1X/EAP is used for bridge authentication, what device in the network acts as the 802.1X Authenticator?


Options are :

  • The RADIUS server
  • A designated non-root bridge
  • The root bridge
  • All non-root bridges

Answer : The root bridge

CWNA-106 Certified Wireless Network Administrator Exam Set 1

The Wi-Fi Multimedia (WMM) certification, created by the Wi-Fi Alliance, is based on the ___________ medium access method with support for ___________.


Options are :

  • HCCA, Unscheduled APSD
  • EDCA, Transmission Opportunities
  • HEMM, Block Acknowledgement
  • DCF, Fast/Secure Roaming

Answer : EDCA, Transmission Opportunities

Given: As a consultant, you have been hired by ABC Company to implement an outdoor WLAN connection between two buildings that are 2 kilometers (1.24 miles) from each other.Your first required objective is to create a point-to-point link between the two buildings within the local regulatory body's 800 mW EIRP maximum. Your second required objective is to provide an industry-standard security solution capable of supporting mutual authentication. As an optional objective, you must minimize the amount of interference to nearby WLAN networks. There are no obstructions between the two buildings.You install an OFDM wireless bridge at each building, configuring one in root mode and the other in non-root mode. You set each radio for 100 mW (+20 dBm) and attach 9 dBi omni-directional antennas to both. You configure each bridge for WPA2-Enterprise with PEAPv0/EAPMSCHAPv2 authentication.Which statement is true about the solution you chose to deploy?


Options are :

  • Your solution meets both required objectives and the optional objective.
  • Your solution meets neither required objective but meets the optional objective.
  • Your solution meets the second required objective and the optional objective, but not the first required objective.
  • Your solution meets both required objectives, but does not meet the optional objective.
  • Your solution meets the first required objective and the optional objective, but not the second objective.

Answer : Your solution meets both required objectives, but does not meet the optional objective.

What features are available within 802.11 WLAN client utilities?


Options are :

  • WLAN Profile Configuration Tool
  • Co-channel Interference Meter
  • Driver Changing Tool
  • Link Statistics Monitor

Answer : WLAN Profile Configuration Tool Link Statistics Monitor

PW0-071 Certified Wireless Technology Specialist Sales Exam Set 3

What statement about 802.11 WLAN performance is true?


Options are :

  • Larger frame sizes result in greater throughput in a low RF interference environment.
  • Compared to an Independent BSS, an Infrastructure BSS can provide almost twice the throughput between wireless nodes.
  • Use of the maximum wireless frame size on the access point will increase throughput between the wired and wireless networks.
  • Changing the security mechanism from WPA2-Enterprise to WPA2-Personal will increase throughput.

Answer : Larger frame sizes result in greater throughput in a low RF interference environment.

Given: XYZ Company has decided to install an 802.11 WLAN system that will support 250 wireless users, but they are concerned about network security. They have decided to implement three mandatory security mechanisms: 1) Role-Based Access Control, 2) 802.1X/PEAP, and 3) Bandwidth Management.What two devices, when implemented together, will give XYZ Company the features that will allow them to meet their security goals?


Options are :

  • Wireless Mesh Router System
  • Wireless Intrusion Prevention System
  • Wireless LAN Controller
  • RADIUS Authentication Server

Answer : Wireless LAN Controller RADIUS Authentication Server

What are some valid reasons for a wireless network administrator to disable 1 and 2 Mbps data rates on a WLAN controller?


Options are :

  • To induce load balancing of stations in the ESS
  • To reduce the number of hidden nodes
  • To increase throughput in each BSS
  • To force users to use 5 GHz frequencies

Answer : To reduce the number of hidden nodes To increase throughput in each BSS

PW0-071 Certified Wireless Technology Specialist Sales Exam Set 3

What are some common components of 802.11 WLAN client utilities?


Options are :

  • Spectrum Analyzer Utility
  • WLAN Profile Configuration Tool
  • Site Survey Utility
  • AP Signal Strength Meter
  • Role Based Access Control Configuration
  • Power Management Mode State Monitor

Answer : WLAN Profile Configuration Tool Site Survey Utility AP Signal Strength Meter

What are possible causes of the "hidden node" problem with 802.11 WLANs?


Options are :

  • Client stations too close in proximity to each other
  • Interfering obstacles between client stations
  • Data frames too large for the physical environment
  • Large 802.11 cells with physically distributed stations
  • Access points broadcasting with too little power
  • Client stations broadcasting with too much power

Answer : Interfering obstacles between client stations Large 802.11 cells with physically distributed stations

How best can throughput capacity be uniquely added to a single channel architecture (SCA) WLAN system?


Options are :

  • By placing APs that are on a single channel more closely together
  • By adding more radios to an AP or co-locating more APs, and having each radio on a different channel
  • By using a channel reuse pattern similar to multiple channel architecture (MCA) WLAN systems
  • By using downlink data compression and uplink flow control at the AP E. By enabled multiple data streams on each radio within an AP

Answer : By adding more radios to an AP or co-locating more APs, and having each radio on a different channel

PW0-104 Wireless LAN Administration Practice Exam Set 4

Given: ABC Company is opening a new branch office that needs an 802.11 WLAN to support a mission-critical application. The IT manager has considered implementing a remote office WLAN controller with lightweight access points instead of several autonomous access points. He has asked you about the primary differences between the two solutions.What statements define characteristics of WLAN controllers?


Options are :

  • Lightweight access points must be plugged directly into the WLAN controller, but autonomous access points can be plugged into Ethernet switches of any kind.
  • The Lightweight Access Point Protocol (LWAPP) allows lightweight access points from one vendor to be used with WLAN controllers from another vendor
  • All lightweight access points support 802.3-2005, Clause 33 PoE, and some lightweight access points support the 802.3at PoE Plus standard.
  • Lightweight access points download their firmware and configuration from the WLAN controller upon initialization, thus reducing management overhead.

Answer : All lightweight access points support 802.3-2005, Clause 33 PoE, and some lightweight access points support the 802.3at PoE Plus standard. Lightweight access points download their firmware and configuration from the WLAN controller upon initialization, thus reducing management overhead.

What problems exist for a multiple channel architecture (MCA) WLAN when its APs are all operating at full power (typically 100mW)?


Options are :

  • WLAN system capacity can be reduced due to co-channel interference.
  • WLAN client stations can experience the hidden node problem when located near each other within the same cell.
  • The mismatched power between WLAN client stations and APs violates many regulatory domain requirements.
  • Mismatched transmission amplitudes between VoWiFi handsets and APs can cause poor quality calls.

Answer : WLAN system capacity can be reduced due to co-channel interference. Mismatched transmission amplitudes between VoWiFi handsets and APs can cause poor quality calls.

What are some problems that may arise in 802.11 WLANs as a result of a hidden node?


Options are :

  • Low throughput within the BSS
  • Collisions on the RF medium
  • Increase in duration values on the RF medium
  • Increased probing by the hidden node
  • High retransmissions from a station

Answer : Low throughput within the BSS Collisions on the RF medium High retransmissions from a station

PW0-105 Certified Wireless Network Administrator Exam Set 1

Given: Co-located ERP-OFDM access points can experience throughput degradation due to frame corruption and retransmissions when operating on non-overlapping channels.What could cause this condition to occur?


Options are :

  • The access points are too close to one another.
  • A client station pre-authenticates to multiple access points in the areA.
  • The output power on each access point is too high.
  • A client station is using active scanning to probe for access points on multiple channels.
  • The antenna gain on each access point is too high.
  • Reflective objects in the area are causing significant multipath.

Answer : The access points are too close to one another. The output power on each access point is too high. The antenna gain on each access point is too high.

What features are supported by 802.11 WLAN controllers?


Options are :

  • Role based access control
  • Guest access functions
  • Layer 3 switching
  • Heat maps overlaying floor plans
  • Multiple simultaneous WLAN profiles

Answer : Role based access control Guest access functions Heat maps overlaying floor plans Multiple simultaneous WLAN profiles

While working in a conference room equipped with a wireless network on a presentation document, you notice that turning your laptop in different directions results in your wireless signal strength changing. This change in signal strength is primarily caused by which RF signal property?


Options are :

  • The RF signal's phase is oscillating due to electromagnetic interference (EMI).
  • The RF signal's polarization is different than the receiving antenna.
  • The RF signal's multipath is changing the amount of RF absorbed by nearby objects.
  • The RF signal's wavelength is being affected by varying antenna gain.
  • The RF signal's amplitude is changing due to a change in the visual line-of-sight.

Answer : The RF signal's polarization is different than the receiving antenna.

PW0-104 Wireless LAN Administration Practice Exam Set 2

As part of a manual RF site survey report, what are the best methods for documenting "dead spots" in an area covered by an indoor 802.11 WLAN?


Options are :

  • Taking digital photographs of dead spots and giving them to end users F. Using a heat map overlaying the floor plan
  • Marking the dead spots with markers, flags, or other visible indicators
  • Dead spots should not be recorded in a site survey report
  • Manually marking the dead spots on the floor plan
  • Showing the dead spots to the network administrator in person

Answer : Taking digital photographs of dead spots and giving them to end users F. Using a heat map overlaying the floor plan Manually marking the dead spots on the floor plan

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