CWNP PW0-105 Online Practice Questions and Exam Preparation

CWNP PW0-105 Online Questions & Answers

• Question 81:

  ABC Company has just purchased a 6 dBi patch antenna. After performing some tests with the 6 dBi antenna, they have concluded that more antenna gain is needed to cover their outdoor courtyard. When choosing an antenna with higher gain, what other antenna characteristic will also change?

  A. Fresnel Zone size
  B. Maximum input power
  C. Beamwidth
  D. Impedance
  E. VSWR Ratio
  C. Beamwidth

• Question 82:

  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?

  A. 17 dBm
  B. 20 dBm
  C. 23 dBm
  D. 27 dBm
  E. 30 dBm
  E. 30 dBm

• Question 83:

  What phrase correctly completes the following sentence?

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

  A. Alternates between awake and dozing, depending on its need to transmit and receive information
  B. Enters a low-power radio state until it receives a WMM PS-Poll frame from the AP
  C. Experiences higher throughput and lower latency than when operating in Active mode
  D. Powers down a subset of MIMO radio chains and transmits information at a slower data rate
  E. Buffers frames destined to the low-power AP until the AP wakes its radio and begins beaconing again
  A. Alternates between awake and dozing, depending on its need to transmit and receive information

• Question 84:

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

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

• Question 85:

  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?

  A. A Voltage Standing Wave Ratio (VSWR) of 1:1
  B. An impedance mismatch between devices in the RF system
  C. Cross-polarization of the RF signal as it passes through the RF system
  D. The use of different connector types in the RF system (e.g. N-type and SMA-type)
  E. Low output power at the transmitter and use of a high-gain antenna
  B. An impedance mismatch between devices in the RF system

• Question 86:

  What statement describes the authorization component of a AAA implementation?

  A. Verifying that a user is who he says he is
  B. Validating client device credentials against a database
  C. Logging the details of user network behavior in order to review it at a later time
  D. Granting access to specific network services according to a user profile
  E. Implementing a WIPS as a full-time monitoring solution to enforce policies
  D. Granting access to specific network services according to a user profile

• Question 87:

  What facts are true regarding controllers and APs in a Split MAC architecture? (Choose 2)

  A. An IP tunnel is established between the AP and controller for AP management and control functions.
  B. Using centralized data forwarding, APs never tag Ethernet frames with VLAN identifiers or 802.1p CoS.
  C. With 802.1X/EAP security, the AP acts as the supplicant and the controller acts as the authenticator.
  D. Management and data frame types must be processed locally by the AP, while control frame types must be sent to the controller.
  E. In a distributed (local bridging) data forwarding model, the AP handles frame encryption and decryption.
  A. An IP tunnel is established between the AP and controller for AP management and control functions.
  E. In a distributed (local bridging) data forwarding model, the AP handles frame encryption and decryption.

• Question 88:

  What is an advantage of using WPA2-Personal instead of WEP-128 as a security solution for 802.11 networks?

  A. WPA2-Personal uses 802.1X/EAP for authentication, and WEP-128 uses preshared keys.
  B. WPA2-Personal is based on IEEE 802.11 industry standards, but WEP is not.
  C. WPA2-Personal uses CCMP for encryption, and WEP-128 uses TKIP for encryption.
  D. WPA2-Personal uses dynamic encryption keys, and WEP-128 uses static keys.
  E. WPA2-Personal requires complex 64-character hex keys, whereas WEP-128 requires weak 26- character hex keys.
  D. WPA2-Personal uses dynamic encryption keys, and WEP-128 uses static keys.

• Question 89:

  When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs respond?

  A. After waiting a SIFS, all APs reply at the same time with a probe response.
  B. After waiting a SIFS, a designated AP sends an ACK, and then replies with a probe response.
  C. Each AP sends its own ACK, and then follows the ACK with a probe response.
  D. For each probe request frame, only one AP may reply with a probe response.
  E. Each AP responds in turn after preparing a probe response and winning contention.
  E. Each AP responds in turn after preparing a probe response and winning contention.

• Question 90:

  As an RF wave propagates through space, the wave front experiences natural expansion that reduces its signal strength in an area. What term describes the rate at which this expansion happens?

  A. MIMO equalization
  B. Inverse square law
  C. Path spread phenomenon
  D. Fresnel zone thinning
  E. Ohm's law
  B. Inverse square law