CWNP CWNP Wireless LAN Certifications PW0-105 Questions & Answers

• Question 31:

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

  A. 9 Mbps

  B. 11 Mbps

  C. 12 Mbps

  D. 54 Mbps

  E. 65 Mbps

  F. 130 Mbps

  Correct Answer: B

• Question 32:

  What information is transmitted in the Beacon management frames of an HT access point to communicate about backward compatibility with ERP and HR/DSSS stations? (Choose two)

  A. HT Protection mode

  B. NonERP Present field

  C. Secondary channel offset

  D. RIFS mode

  E. Power save mode of clients

  Correct Answer: AB

• Question 33:

  What mechanisms are specified by the IEEE 802.11 standard to attempt to prevent multiple radios from transmitting on the RF medium at a given point in time? (Choose three)

  A. Random backoff timer

  B. Clear channel assessment

  C. Network allocation vector

  D. Slot assessment value

  E. Collision detection

  F. Duty cycle detection

  Correct Answer: ABC

• Question 34:

  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 26character hex keys.

  Correct Answer: D

• Question 35:

  Given: You are being interviewed by ABC Company for employment as a wireless site survey engineer. The interviewing manager asks you what items should be included in a manual RF site survey report.

  What answer would be accurate? (Choose two)

  A. Itemized list of equipment, licenses, and support contracts required for the facility

  B. RF heat map illustrating coverage and signal quality for each frequency band

  C. Documentation noting physical security hazards in the RF coverage area

  D. Documentation noting where each access point will be placed and how it will be mounted

  E. Documentation noting how each WLAN user group will authenticate to the network

  Correct Answer: BD

• Question 36:

  What statement about 802.3af Power over Ethernet (802.3, Clause 33) is true?

  A. If a dual-radio access point requires 12W to operate, a PoE power source supplies 15.4W to the powered interface.

  B. 802.3af-compliant endpoint and midspan PSE devices support 10/100 as well as Gigabit (1000BaseT) data rates.

  C. Class 1 powered devices may use a maximum of 29W of power.

  D. 802.3af-compliant Ethernet switches must be able to simultaneously support class 3 powered devices on every powered interface.

  E. There are two classes of 802.3af PSEs: Type A supports up to 7W and Type B supports up to 15W of supplied power.

  Correct Answer: A

• Question 37:

  What is required to establish a high quality 2.4 GHz RF link at a distance of 3 miles (5 kilometers)?

  A. Minimum output power level of 1 W

  B. Accurate Earth Bulge calculations

  C. Directional antennas at each endpoint

  D. A minimum antenna gain of 13 dBi at both endpoints

  E. A Fresnel Zone that is at least 60% clear of obstructions

  Correct Answer: E

• Question 38:

  Prior to association, what parameter can 802.11 client devices measure and use to select the optimal access point for association?

  A. Signal strength of access point beacons

  B. Proximity to potential access points

  C. Retry rate of probe request and response frames

  D. Average round trip time to reach the IP gateway

  E. Number of nearby RF interference sources

  Correct Answer: A

• Question 39:

  What statements about the beamwidth of an RF antenna are true? (Choose two)

  A. The lower the gain of an antenna, the more narrow one or both beamwidths become.

  B. The beamwidth patterns on an antenna polar chart indicate the point at which the RF signal stops propagating.

  C. Horizontal and vertical beamwidth are calculated at the points in which the main lobe decreases power by 3 dB.

  D. Horizontal beamwidth is displayed (in degrees) on the antenna's Azimuth Chart.

  E. Antenna beamwidth is measured in units of decibels relative to an isotropic radiator (dBi).

  Correct Answer: CD

• Question 40:

  When compared with legacy Power Save mode, how does WMM-PS improve voice device and application performance?

  A. WMM-PS identifies and prioritizes incoming VoIP data and delivers it immediately

  B. WMM-PS uses a trigger-and-delivery method that eliminates the need for PS-Poll exchanges

  C. WMM-PS requires scheduled service periods for predictable uplink data delivery.

  D. WMM-PS allows the WLAN transceiver to disable more components when in a low power state.

  Correct Answer: B