CWNP CWNP Wireless LAN Certifications PW0-105 Questions & Answers

• Question 51:

  What term correctly completes the following sentence?

  In an IEEE 802.11 frame, the IP packet is considered by the MAC layer to be a(n) _________.

  A. MAC Service Data Unit (MSDU)

  B. MAC Protocol Data Unit (MPDU)

  C. Bridge Protocol Data Unit (BPDU)

  D. PLCP Service Data Unit (PSDU)

  E. PLCP Protocol Data Unit (PPDU)

  Correct Answer: A

• Question 52:

  What factors are likely to cause the greatest impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS? (Choose three)

  A. Use of WEP or TKIP for encryption instead of CCMP

  B. Use of passphrase authentication instead of 802.1X/EAP authentication

  C. Increasing the beacon interval from 100 to 200 (TUs)

  D. RF interference from more than 10 nearby Bluetooth transmitters

  E. Increasing or decreasing the number of spatial streams in use by the client station and AP

  F. Configuring the AP to perform off-channel IDS scans for rogue devices for 50 ms out of every 20 seconds

  Correct Answer: ADE

• Question 53:

  Given: Joe runs a small hotel, and as a value added service for his customers he has implemented a Wi-Fi hot-spot. Joe has read news articles about how hackers wait at hot-spots trying to take advantage of unsuspecting users. Joe wants to avoid this problem at his hotel.

  What is an efficient and practical step that Joe can take to decrease the likelihood of active attacks on his customers' wireless computers?

  A. Implement Network Access Control (NAC) and require antivirus and firewall software along with OS patches

  B. Require EAP-FAST authentication and provide customers with a username/password on their receipt

  C. Implement an SSL VPN in the WLAN controller that initiates after HTTPS login

  D. Enable station-to-station traffic blocking by the access points in the hotel

  Correct Answer: D

• Question 54:

  In an 802.11n WLAN with a heterogeneous set of associated client devices including 802.11b, 11g, and 11n, what HT protection mode will the BSS use?

  A. Mode 0: No protection mode (Greenfield)

  B. Mode 1: Nonmember protection mode

  C. Mode 2: 20 MHz protection mode

  D. Mode 3: Non-HT mixed mode

  Correct Answer: D

• Question 55:

  Given: As you prepare for a site survey in a hospital, you have learned about several wireless devices that support connection-oriented, real-time applications. These applications are sensitive to service interruptions and require excellent signal quality, low latency, and low loss. For that reason, it is important to identify sources of RF interference as well as building characteristics that would cause RF blockage or dead spots.

  What systems or environmental characteristics are most likely to cause interference or RF blockage and disrupt service for these applications? (Choose two)

  A. Microwave ovens

  B. Long hallways

  C. Elevator shafts

  D. RFID chokepoints

  E. Drywall offices

  Correct Answer: AC

• Question 56:

  What factors influence the distance that an RF signal can be effectively received? (Choose 4)

  A. Transmitting station's antenna type

  B. Receiving station's radio sensitivity

  C. Free Space Path Loss

  D. MAC layer encryption

  E. Transmitting station's output power

  F. Temperature in the Fresnel zone

  Correct Answer: ABCE

• Question 57:

  What three cipher suites are specified by the IEEE 802.11-2007 standard? (Choose three)

  A. Counter Mode with CBC-MAC Protocol

  B. Wi-Fi Protected Access v1 and v2

  C. Internet Protocol Security

  D. Extensible Authentication Protocol

  E. Internet Key Exchange v2

  F. Wired Equivalent Privacy

  G. Temporal Key Integrity Protocol

  Correct Answer: AFG

• Question 58:

  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

  Correct Answer: B

• Question 59:

  What advantages does using predictive site survey modeling software offer over performing a manual site survey? (Choose two)

  A. Predictive modeling software can predict the ideal access point location 100% of the time, whereas the results from manual surveying are less reliable.

  B. Predictive modeling software makes it simple to assess multiple different AP locations and then adjust and display the AP's expected coverage pattern in almost real-time.

  C. Predictive modeling software provides more reliable data than manual surveys when fine-tuning and validating access point placement after the installation.

  D. The exact impact of interference sources from external networks can be more accurately measured when using predictive modeling software than with manual surveys.

  E. It takes less time to create an initial site survey for a large facility when using predictive modeling software than when performing a manual survey.

  Correct Answer: BE

• Question 60:

  What term correctly completes the following sentence?

  802.11a/b/g used a mandatory 800ns guard interval. 802.11n introduces an optional short 400ns guard interval. Guard intervals (GI) are necessary in OFDM to reduce the likelihood of interference between two consecutive ____________.

  A. Frames

  B. Packets

  C. Segments

  D. Bits

  E. Bytes

  F. Symbols

  Correct Answer: F