CWNP PW0-104 Online Practice Questions and Exam Preparation

CWNP PW0-104 Online Questions & Answers

• Question 81:

  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 82:

  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
  A. HT Protection mode
  B. NonERP Present field

• Question 83:

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

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

• Question 84:

  Given:

  You were previously on-site at ABC's facility to conduct a pre-deployment RF site survey. The WLAN has been deployed according to your recommendations and you are on-site again to perform a network validation.

  When performing this type of post-deployment RF site survey for VoWiFi, what are two steps that must be performed? (Choose two)

  A. Coverage analysis to verify appropriate coverage and roaming boundaries
  B. Spectrum analysis to locate and identify RF interference sources
  C. Hidden node analysis to identify and relocate existing hidden nodes
  D. Protocol analysis to discover channel use on neighboring APs
  E. Application analysis with an active phone call on a VoWiFi handset
  A. Coverage analysis to verify appropriate coverage and roaming boundaries
  E. Application analysis with an active phone call on a VoWiFi handset

• Question 85:

  Given:

  You have been sent as a consultant to a customer site that is experiencing problems with some 2.4 GHz clients on their 802.11a/g network. After collecting information from the company about the problem, your initial troubleshooting step is

  to find a client device experiencing performance problems and observe its 802.11 frame exchanges in a protocol analyzer. The retransmission rate for that client is 65% instead of the company's baseline, which is 9%.

  Based on this information, what troubleshooting step should follow to isolate the problem?

  A. Check the frame decodes in the protocol analyzer and look for an excessive number of deauthentication frames.
  B. Evaluate the client's operating frequency band with a spectrum analyzer, looking for a high noise floor or interference sources.
  C. Utilize a laptop-based site survey and planning tool to create a predictive model of the optimal AP placement in the customer's facility.
  D. With a protocol analyzer, identify the client's roaming threshold settings and reassociation behavior.
  E. Install Wi-Fi endpoint security and reporting software on the client device to monitor and log the retransmission behavior.
  B. Evaluate the client's operating frequency band with a spectrum analyzer, looking for a high noise floor or interference sources.

• Question 86:

  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
  B. Power management
  D. Roaming aggressiveness

• Question 87:

  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?

  A. 802.11n OFDM is more susceptible to high-power, narrowband interference than 802.11a OFDM.
  B. In order to earn Wi-Fi Alliance certification, 802.11n clients stations are required to support both 2.4 and 5 GHz frequencies
  C. 802.11a/g devices may support WMM, but all 802.11n devices are required to support WMM.
  D. An 802.11g/n AP that is configured to support only OFDM data rates will allow HR/DSSS devices to associate.
  E. When HR/DSSS devices are present, HT MCS rates are disabled for the entire BSS.
  C. 802.11a/g devices may support WMM, but all 802.11n devices are required to support WMM.

• Question 88:

  What is a common feature of an 802.11 WLAN client utility? (Choose two)

  A. Real-time retry monitor
  B. AP Signal strength meter
  C. Spectrum analyzer utility
  D. VLAN configuration
  E. Link statistics display
  B. AP Signal strength meter
  E. Link statistics display

• Question 89:

  During the discovery and connectivity process, client and AP stations exchange information about their supported data rates. After the association, how do client and AP stations select the supported data rate that will be used to send an

  802.11 data frame?

  A. During the association, the client and AP agree to use the same transmit rate, but either station can request a change at any time after the association.
  B. The client and AP each choose the optimal data rate to use independently of one another, based on their own experience of the RF link.
  C. The client and AP may use different transmit rates, but the AP determines the data rate that will be used by each client station in the BSS.
  D. The client and AP may use different transmit rates, but the client determines the data rate that it will use and the data rate that the AP will use when communicating to the client.
  E. The client and AP may use a different transmit rates, but the transmit rate is determined by the peer station, based on the peer's experience of the RF link.
  B. The client and AP each choose the optimal data rate to use independently of one another, based on their own experience of the RF link.

• Question 90:

  As XYZ Company's wireless specialist, you have been asked to troubleshoot some unexpected frame patterns in a wireless protocol capture. Your peers explain that the network's beacon frames are inconsistent. That is, the BSSID is the same for all beacons, but the source address varies between three different addresses.

  What network configuration would cause this beacon frame behavior?

  A. A single AP supports multiple BSSs with different SSIDs
  B. A virtual cell single channel network has been implemented
  C. The beacons are from an IBSS instead of a BSS
  D. Three APs still share the same default configuration.
  C. The beacons are from an IBSS instead of a BSS