PW0-105 Certified Wireless Network Administrator CWNA Exam Set 4

Which data rate is supported by 802.11g radios that is not supported by 802.11a radios?


Options are :

  • 12 Mbps
  • 11 Mbps
  • 54 Mbps
  • 9 Mbps

Answer : 11 Mbps

Given: XYZ Company has decided to install an 802.11 WLAN system that will support 1000 wireless users, but they are concerned about network security. XYZ is interested in deploying standardized security features. In addition to WPA2-Enterprise with PEAP and role-based access control, XYZ would like to support management frame protection as well as a fast secure roaming protocol for future mobile handsets.

As XYZ Company selects a product to deploy, what two IEEE amendments should be supported to provide the management frame protection and fast secure roaming security features? (Choose two)

A. 802.11j

B. 802.11p

C. 802.11r

D. 802.11u

E. 802.11w

F. 802.11z


Options are :

  • E,F
  • C,E
  • A,B
  • D,E

Answer : C,E

What phrase correctly completes the following sentence?

When using WMM Power Save operation, a wireless client device ______________.


Options are :

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

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

PW0-270 Certified Wireless Analysis Professional (CWAP) Exam Set 3

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


Options are :

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

Answer : 902 - 928 MHz ISM band

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

A. Wi-Fi enabled voice handsets with low transmit power can experience asynchronous downlink and uplink performance.

B. WLAN client stations can experience the hidden node problem when located near each other within the same cell.

C. The mismatched power between WLAN client stations and APs violates regulatory and IEEE signal quality requirements.

D. Cell size may be too large, causing co-channel interference to adjacent cells and reducing system capacity.

E. APs operating in the 2.4 GHz band would prevent microwave ovens and analog video cameras from functioning


Options are :

  • A,D
  • C,D
  • A,B
  • D,E

Answer : A,D

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


Options are :

  • An IBSS does not have a distribution system (DS), 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 require beacon frames, but a BSS does.
  • An IBSS does not support 802.11 authentication or association, but a BSS does.

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

PW0-104 Wireless LAN Administration Certified Practice Exam Set 5

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


Options are :

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

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

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

A. HR/DSSS (802.11b)

B. OFDM (802.11a)

C. ERP (802.11g)

D. HT (802.11n)

E. CCK (802.11b)

F. PBCC (802.11g)


Options are :

  • D,E
  • C,D
  • E,F
  • B,C
  • A,B

Answer : C,D

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 :

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

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

PW0-104 Wireless LAN Administration Practice Exam Set 1

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)

A. RF pre-deployment planning and post-deployment reporting of access point locations on a floor plan

B. Performance and security monitoring of WLAN controllers with alarms and notifications for administrative staff

C. Radio management, fast roaming, key caching, and other centralized control plane operations

D. Centralized bridging of guest data traffic and application of firewall and QoS policies to data

E. Management of WLAN controller configuration and provisioning of firmware updates

F. Generating, encrypting, and decrypting 802.11 frames and collecting RF radio data.


Options are :

  • C,D,E
  • D,E,F
  • A,B,C
  • A,B,E

Answer : A,B,E

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


Options are :

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

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, single-band 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 :

  • 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
  • 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.
  • 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

PW0-105 Certified Wireless Network Administrator Exam Set 2

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 :

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

Answer : Passive Gain

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


Options are :

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

Answer : An impedance mismatch in the RF cables and connectors

What phrase defines Equivalent Isotropically Radiated Power (EIRP)?


Options are :

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

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

CWNA-106 Certified Wireless Network Administrator Exam Set 1

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

A. 20 MHz

B. 20/40 MHz

C. 5/10 MHz

D. 22 MHz

E. 80 MHz

F. 160 MHz


Options are :

  • C,D
  • E,F
  • A,B
  • D,E

Answer : A,B

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 :

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

Answer : 30 dBm

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)

A. Use high-gain omnidirectional antennas to improve SNR

B. Use directional antennas to isolate the RF propagation

C. Configure APs to transmit at or near their maximum power setting

D. Use WPA2-Personal security for ease of deployment

E. Disable 802.11n MCS rates to prevent high overhead protection mechanisms

F. Implement a band steering feature for dual-band clients


Options are :

  • C,D
  • B,F
  • E,F
  • A,B

Answer : B,F

PW0-071 Certified Wireless Technology Specialist Sales Exam Set 1

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

A. Frame generator utility

B. Power management

C. Co-channel interference threshold

D. Roaming aggressiveness

E. AES key and block size


Options are :

  • C,E
  • A,B
  • D,E
  • B,D

Answer : B,D

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

A. Channels 5 and 10

B. Channels 1 and 5

C. Channels 3 and 7

D. Channels 2 and 8

E. Channels 8 and 11

F. Channels 10 and 13


Options are :

  • B,C
  • A,B
  • A,D
  • E,F

Answer : A,D

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


Options are :

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

PW0-105 Certified Wireless Network Administrator CWNA Exam Set 2

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

A. RF cables have upper and lower frequency range specifications.

B. 75 and 125 ohms are the typical impedances of 802.11 WLAN connectors.

C. Two RF connectors of the same type (e.g. SMA), manufactured by different companies, may vary in specifications.

D. Every RF connector causes insertion loss.

E. Large diameter RF cables cause greater loss than small diameter cables.

F. Coaxial RF cables can be used to carry Power-over-Ethernet (PoE) to an outdoor bridge mounted on a mast.


Options are :

  • A,C,D
  • B,C,D
  • D,E,F
  • A,B,C

Answer : A,C,D

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