CWNP PW0-250 Online Practice Questions and Exam Preparation

CWNP PW0-250 Online Questions & Answers

• Question 11:

  What is the purpose of Friis transmission equation [(LdB) = 20 log(d) + 20 log (f) - 27.55 ]?

  A. Calculate earth bulge to determine minimum antenna height
  B. Calculate receive sensitivity for an 802.11 radio/antenna pair
  C. Calculate RF path loss in free space
  D. Calculate the loss experienced between the intentional radiator and antenna
  E. Calculate the minimum voltage requirements for lightning suppression systems
  C. Calculate RF path loss in free space

• Question 12:

  You deployed an AP and installed its antenna, and you now need to set the AP transmit power. Given a desired EIRP of 21 dBm, and an antenna gain of 5.85 dBd connected through 25 feet of cable with a loss specification of 4 dB/100 feet. Assuming that there is no significant loss from the connectors, what should be the transmit power level for this AP?

  A. 10 mW
  B. 14 mW
  C. 20 mW
  D. 25 mW
  E. 40 mW
  F. 50 mW
  D. 25 mW

• Question 13:

  ABC Manufacturing has a heavily-used dual-band (2.4 / 5 GHz) WLAN, but sporadic RF interference across the 2.4 GHz band is causing dropped VoWiFi calls and leading to data connectivity and throughput problems.

  

  

  What steps should ABC Manufacturing take to most effectively remedy this problem?

  A. Solution 1
  B. Solution 2
  C. Solution 3
  D. Solution 4
  B. Solution 2

• Question 14:

  What exhibit reflects the recommended life-cycle steps for successfully designing and deploying an enterprise WLAN from start to finish? (Choose 2) A. Solution 1

  

  

  B. Solution 2
  C. Solution 3
  D. Solution 4
  E. Solution 5
  E. Solution 5

• Question 15:

  When a WLAN controller transmits an Ethernet frame that has an IEEE 802.11 frame as its payload to a lightweight AP, what type of QoS marks can be applied to the Ethernet frame and/or its payload? (Choose 3)

  A. IEEE 802.1Q PCP marks in the Ethernet frame header
  B. User Priority marks in the IEEE 802.11 frame header
  C. Throughput subscription marks in the Ethernet frame header
  D. MPLS tags from the Label Edge Router (LER)
  E. DSCP marks to the ToS bits in the encapsulating IP packet header
  F. RSVP tag if RTP is the payload of the IEEE 802.11 frame
  A. IEEE 802.1Q PCP marks in the Ethernet frame header
  B. User Priority marks in the IEEE 802.11 frame header
  E. DSCP marks to the ToS bits in the encapsulating IP packet header

• Question 16:

  Your customer location is equipped with DAS, originally deployed to relay a GSM signal indoors and provide 802.11 data coverage to static stations. What type of wireless application would be least likely to be supported by this RF distribution model?

  A. On-demand video streaming over wireless
  B. Data connection with frequent roaming
  C. Location-based services for wireless assets or RFID tags
  D. VoWLAN if the codec is G.729.
  E. FTP over implicit TLS/SSL
  C. Location-based services for wireless assets or RFID tags

• Question 17:

  When deploying long-distance 802.11 bridge links (10 miles / 16 km), what parameter may be critical for improving data flow by reducing retries caused by the long distances?

  A. The sequence control field value
  B. The PHY parameter set field
  C. The minimum transmit data rate value
  D. The CTS-to-self threshold
  E. The Beacon interval
  F. The acknowledgement timeout threshold
  F. The acknowledgement timeout threshold

• Question 18:

  According to WLAN security design best practices, what is true of the EAP properties shown in the exhibit?

  

  A. The "Validate server certificate" checkbox should be checked if you purchased a third-party SSL certificate for the AS, but left unchecked if you have a self-signed certificate for the AS.
  B. The "Validate server certificate" checkbox should always be checked to prevent MITM attacks from rogue authentication servers.
  C. The "Trusted Root Certification Authorities" list is provided to identify the certificate that the client should send to the AS for client authentication.
  D. The "Do not prompt user to authorize new servers or trusted certification authorities" box should be checked only for administrative users.
  E. The "Enable Identity Privacy" checkbox and anonymous name field are only useful for networks supporting EAP-LEAP.
  B. The "Validate server certificate" checkbox should always be checked to prevent MITM attacks from rogue authentication servers.

• Question 19:

  What RF math formula should be used to convert an RF value in units of dBm into a value of mW?

  *NotE. "dBm" in the formulas represents the known dBm value

  A. mW 10(dBm/10)
  B. mW
  C. mW
  D. mW
  E. mW
  F. mW =
  A. mW 10(dBm/10)

• Question 20:

  As you plan a WLAN upgrade, you have assessed the network requirements and data signatures of your applications. One of the popular applications used on your network requires high bandwidth and low to medium Wi-Fi loss, but can tolerate moderate latency and jitter.

  What application matches this description?

  A. Voice
  B. Email
  C. Skype chat
  D. Video-on-demand
  E. Video conferencing
  F. FTP
  D. Video-on-demand