PW0-105 Certified Wireless Network Administrator Exam Set 2

Given: To ease user complexity, your company has implemented a single SSID for all employees. However, the network administrator needs a way to control the network resources that can be accessed by each employee based on their department.What WLAN feature would allow the network administrator to accomplish this task?


Options are :

  • SNMP
  • VRRP
  • RBAC
  • IPSec

Answer : RBAC

As a consultant, you've been hired by XYZ Company to provide recommendations about client device selection, operation, and interoperability. What information should be considered to help them choose the right WLAN client devices?


Options are :

  • 802.11n OFDM is more susceptible to high-power, narrowband interference than 802.11a OFDM.
  • In order to earn Wi-Fi Alliance certification, 802.11n clients stations are required to support both 2.4 and 5 GHz frequencies
  • 802.11a/g devices may support WMM, but all 802.11n devices are required to support WMM.
  • An 802.11g/n AP that is configured to support only OFDM data rates will allow HR/DSSS devices to associate.

Answer : 802.11a/g devices may support WMM, but all 802.11n devices are required to support WMM.

Given: ABC Hospital is planning a Wi-Fi infrastructure upgrade where the 802.11b/g APs would be replaced with new dual-radio HT (802.11n) APs. ABC wants to minimize the time and cost associated with performing a new site survey, so they will be mounting all of the new APs in the same locations and with the same cable drops as the existing APs. What is one performance drawback with this deployment method?


Options are :

  • Multipath will increase, causing excessive layer-2 retransmissions. The retransmissions will cause latency for VoWiFi handsets.
  • Increased receiver sensitivity on the HT APs will cause them to continually change channels to avoid co-channel interference
  • If the existing UTP cabling is not Category 6 or better, the total Ethernet backhaul for each AP will be limited to 100 Mbps.
  • In locations with line-of-sight to client devices and little multipath, the benefits of MIMO may be less significant than in other areas.

Answer : In locations with line-of-sight to client devices and little multipath, the benefits of MIMO may be less significant than in other areas.

CWNA-106 Certified Wireless Network Administrator Exam Set 4

Given: In a single channel architecture (SCA) WLAN system, 802.11n (HT) APs should not share an SSID with 802.11g (ERP) APs.What is the reason for this recommendation?


Options are :

  • Client stations would see two different sets of AP capabilities as they roam between APs with the same BSSID.
  • The added range of 802.11n APs would cause additional co-channel interference.
  • The additional beacon material in 802.11n beacons would confuse 802.11b/g client stations.
  • Beacons from 802.11n APs use 40 MHz channels, while beacons from 802.11g APs use 20 MHz channels.

Answer : Client stations would see two different sets of AP capabilities as they roam between APs with the same BSSID.

Which unit of measurement is a relative unit that is used to quantify power level changes?


Options are :

  • dBm
  • dBW
  • dB
  • mW

Answer : dB

Given: Return Loss is the decrease of forward energy in a system when some of the power is being reflected back toward the transmitter.What causes high return loss in an RF transmission system?


Options are :

  • A Voltage Standing Wave Ratio (VSWR) of 1:1
  • An impedance mismatch between devices in the RF system
  • Cross-polarization of the RF signal as it passes through the RF system
  • The use of different connector types in the RF system (e.g. N-type and SMA-type)

Answer : An impedance mismatch between devices in the RF system

PW0-071 Certified Wireless Technology Specialist Sales Exam Set 2

The OSI model is a 7-layer model for understanding the functions of a communication system. What OSI sublayers are specifically addressed by the IEEE 802.11-2007 standard? (Choose 2)


Options are :

  • MSDU
  • PPDU
  • PLCP
  • MAC

Answer : PLCP MAC

The 802.11 protocol specifies a fundamental channel access method that is required for all stations and is used in all IBSS and BSS networks.What is this fundamental channel access method called?


Options are :

  • DCF
  • PCF
  • HCF
  • EDCAF

Answer : DCF

What factor is NOT taken into account when calculating the Link Budget of a point-to-point outdoor WLAN bridge link?


Options are :

  • Operating frequency
  • Transmit antenna gain
  • Transmit power
  • Antenna height

Answer : Antenna height

PW0-105 Certified Wireless Network Administrator Exam Set 4

ABC Company is planning a point-to-multipoint outdoor bridge deployment with standalone (autonomous) 802.11 bridge units. 802.1X/EAP will be used for bridge authentication. What device in the bridge implementation acts as the 802.1X Authenticator?


Options are :

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

Answer : The root bridge

What phrase correctly completes the following sentence?When using WMM Power Save operation, a wireless client device ______________.


Options are :

  • Powers down a subset of MIMO radio chains and transmits information at a slower data rate
  • Alternates between awake and dozing, depending on its need to transmit and receive information
  • Enters a low-power radio state until it receives a WMM PS-Poll frame from the AP
  • Experiences higher throughput and lower latency than when operating in Active mode

Answer : Alternates between awake and dozing, depending on its need to transmit and receive information

PW0-105 Certified Wireless Network Administrator Exam Set 4

When planning an access point deployment that utilizes Power over Ethernet (PoE) switches at the network edge, what design decision could adversely affect the operation of 802.3af APs?


Options are :

  • A gigabit Ethernet switch port supporting an 802.11a/g AP auto-negotiates to 100 Mbps
  • Some APs are connected to a PoE switch and are also receiving power from an AC outlet
  • All ports on the Ethernet switch will be supporting Class 3 PoE powered devices.
  • The Ethernet switch's uplink ports are not connected to an 802.3af-compliant core or distribution Ethernet switch

Answer : All ports on the Ethernet switch will be supporting Class 3 PoE powered devices.

What phrase defines Equivalent Isotropically Radiated Power (EIRP)?


Options are :

  • Radio transmitter output power only
  • Power supplied to the transmit antenna input plus antenna gain
  • Radio transmitter output power minus attached cable and connector loss
  • Reflected power due to an impedance mismatch in the signal path

Answer : Power supplied to the transmit antenna input plus antenna gain

What are two channel modes specified by the 802.11n (High Throughput) PHY? (Choose two)


Options are :

  • 22 MHz
  • 20 MHz
  • 5/10 MHz
  • 20/40 MHz

Answer : 20 MHz 20/40 MHz

PW0-104 Wireless LAN Administration Certified Practice Exam Set 2

What statements accurately describe the RF cables and connectors that are used in an 802.11 WLAN system? (Choose three)


Options are :

  • 75 and 125 ohms are the typical impedances of 802.11 WLAN connectors.
  • Two RF connectors of the same type (e.g. SMA), manufactured by different companies, may vary in specifications.
  • Every RF connector causes insertion loss
  • RF cables have upper and lower frequency range specifications.

Answer : Two RF connectors of the same type (e.g. SMA), manufactured by different companies, may vary in specifications. Every RF connector causes insertion loss RF cables have upper and lower frequency range specifications.

ABC Company has thousands of Wi-Fi users accessing their network on a daily basis. Their WLAN consists of 700 access points, 6 WLAN controllers, and a wireless network management system.What network functions are performed by the enterprise-class WNMS? (Choose three)


Options are :

  • RF pre-deployment planning and post-deployment reporting of access point locations on a floor plan
  • Performance and security monitoring of WLAN controllers with alarms and notifications for administrative staff
  • Centralized bridging of guest data traffic and application of firewall and QoS policies to data
  • Radio management, fast roaming, key caching, and other centralized control plane operations

Answer : RF pre-deployment planning and post-deployment reporting of access point locations on a floor plan Performance and security monitoring of WLAN controllers with alarms and notifications for administrative staff Centralized bridging of guest data traffic and application of firewall and QoS policies to data

Which IEEE 802.11 physical layer (PHY) specifications include support for and compatibility of both OFDM and HR/DSSS? (Choose 2)


Options are :

  • HT (802.11n)
  • OFDM (802.11a)
  • HR/DSSS (802.11b)
  • ERP (802.11g)

Answer : HT (802.11n) ERP (802.11g)

PW0-104 Wireless LAN Administration Certified Practice Exam Set 1

What frequency band is NOT specified for use by IEEE 802.11 radios?


Options are :

  • 902 - 928 MHz ISM band
  • 5.15 5.25 GHz UNII band
  • 4.94 4.99 GHz public safety band
  • 2.4000 2.4835 GHz ISM band

Answer : 902 - 928 MHz ISM band

What distinguishes an independent basic service set (IBSS) from an infrastructure basic service set (BSS)?


Options are :

  • An IBSS does not require beacon frames, but a BSS does
  • An IBSS can only operate on a single channel, but a BSS can operate on multiple channels.
  • An IBSS does not support 802.11 authentication or association, but a BSS does
  • An IBSS does not have a distribution system (DS), but a BSS does.

Answer : An IBSS does not have a distribution system (DS), but a BSS does.

In an 802.11b/g system, what channels are considered non-overlapping? (Choose two)


Options are :

  • Channels 2 and 8
  • Channels 3 and 7
  • Channels 5 and 10
  • Channels 1 and 5

Answer : Channels 2 and 8 Channels 5 and 10

PW0-270 Certified Wireless Analysis Professional (CWAP) Exam Set 5

What problems may occur when there are hidden nodes in the BSS?


Options are :

  • Excessive use of null data frames
  • High retransmission count for a subset of client stations
  • Increase in downlink (transmitted by AP) frame retries
  • Use of frame fragmentation with fragment bursts

Answer : High retransmission count for a subset of client stations

The client devices that connect to your network include a mix of dual-band 802.11n, singleband 802.11b/g, and some 802.11a/g. Your access points are configured with the same SSID on both the 2.4 and 5 GHz bands. The APs are also configured to prioritize client connectivity to 5 GHz.How does an AP perform band steering to encourage clients to use 5 GHz?


Options are :

  • The AP may allow an 802.11 association with the client in the 2.4 GHz band, then send unicast channel switch announcements to the client announcing the 5 GHz channel as the new channel.
  • After receiving probe request frames from the same client in both bands, the AP may send an association request frame to the client in the 5 GHz band.
  • The AP may ignore the initial probe requests or 802.11 authentication requests sent in the 2.4 GHz band by dual-band clients
  • When the client sends a probe request in the 2.4 GHz band, the AP may reply with information about the 5 GHz BSS.

Answer : The AP may ignore the initial probe requests or 802.11 authentication requests sent in the 2.4 GHz band by dual-band clients

What features are most often configurable within 802.11 WLAN client utilities? (Choose two)


Options are :

  • Co-channel interference threshold
  • Roaming aggressiveness
  • Frame generator utility
  • Power management

Answer : Roaming aggressiveness Power management

CWNA-106 Certified Wireless Network Administrator Exam Set 3

Given: When designing a WLAN infrastructure implementation for high client density at a public venue such as a conference or stadium, what are common best practices? (Choose 2)


Options are :

  • Use directional antennas to isolate the RF propagation
  • Use high-gain omnidirectional antennas to improve SNR
  • Implement a band steering feature for dual-band clients
  • Use WPA2-Personal security for ease of deployment
  • Configure APs to transmit at or near their maximum power setting
  • Disable 802.11n MCS rates to prevent high overhead protection mechanisms

Answer : Use directional antennas to isolate the RF propagation Implement a band steering feature for dual-band clients

How is throughput capacity scaled in a single channel architecture (SCA) WLAN system?


Options are :

  • By adding more SSIDs to existing APs to spread users across different contention domains.
  • By using downlink data compression and uplink flow control at the AP.
  • By increasing transmit power and placing APs that are on a single channel farther from one another.
  • By adding APs to increase the number of non-overlapping channel layers.

Answer : By adding APs to increase the number of non-overlapping channel layers.

What term describes the effect of increasing the intensity of an RF wave with an antenna by focusing the energy in a specific direction?


Options are :

  • Passive Gain
  • Active Amplification
  • Beam Compression
  • Spatial Multiplexing

Answer : Passive Gain

PW0-104 Wireless LAN Administration Certified Practice Exam Set 4

Given: An 802.11 WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB loss.The cable is connected to an antenna with 16 dBi gain.What is the EIRP power output?


Options are :

  • 20 dBm
  • 23 dBm
  • 17 dBm
  • 27 dBm
  • 30 dBm

Answer : 30 dBm

What can cause an excessively high VSWR (Voltage Standing Wave Ratio) in a WLAN RF transmission line?


Options are :

  • Crosstalk (inductance) between adjacent RF conductors
  • An impedance mismatch in the RF cables and connectors
  • Reflected direct current (DC) voltage on the main RF signal line
  • Attenuation of the RF signal as it travels along the main signal path

Answer : An impedance mismatch in the RF cables and connectors

What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) in IEEE 802.11 WLANs?


Options are :

  • 802.11a/g/n OFDM includes several combinations of modulation and coding to achieve data rates from 1-600 Mbps.
  • 802.11n HT-OFDM utilizes 256-QAM, which increases the data rate from 54 Mbps (with 64-QAM) up to 65 Mbps.
  • In 802.11a OFDM, forty-eight (48) subcarriers are used as parallel symbol transmission paths to carry data.
  • 802.11a and 11n use six (6) "pilot" subcarriers as a reference for the receiver to detect frequency and phase shifts of the signal.
  • With 802.11a OFDM, 16-QAM provides either 48 or 54 Mbps data rates, depending upon coding rates.

Answer : In 802.11a OFDM, forty-eight (48) subcarriers are used as parallel symbol transmission paths to carry data.

PW0-105 Certified Wireless Network Administrator CWNA Exam Set 3

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


Options are :

  • Cell size may be too large, causing co-channel interference to adjacent cells and reducing system capacity.
  • Wi-Fi enabled voice handsets with low transmit power can experience asynchronous downlink and uplink performance.
  • The mismatched power between WLAN client stations and APs violates regulatory and IEEE signal quality requirements.
  • WLAN client stations can experience the hidden node problem when located near each other within the same cell.

Answer : Cell size may be too large, causing co-channel interference to adjacent cells and reducing system capacity. Wi-Fi enabled voice handsets with low transmit power can experience asynchronous downlink and uplink performance.

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