CWNP CWNA CWNA-106 Questions & Answers

• Question 31:

  The IEEE 802.11-2012 standard requires VHT capable devices to be backward compatible with devices using which other 802.11 physical layer specification (PHY)?

  A. OFDM

  B. HR/DSSS

  C. ERP-PBCC

  D. DSSS

  Correct Answer: A

• Question 32:

  Which antenna types are commonly used by indoor Wi-Fi devices in a MIMO diversity implementation? (Choose 2)

  A. Dipole

  B. Patch

  C. Dish

  D. Grid

  E. Sector

  Correct Answer: AB

• Question 33:

  What answer correctly completes the following sentence?

  ____________ and physical carrier sense functions are used to determine if the wireless medium is busy.

  A. Backup

  B. Passive

  C. Virtual

  D. Active

  Correct Answer: C

• Question 34:

  What parameter of the client drivershould be configured on a Windows computer to optimize moving from one AP to another within the ESS?

  A. Band preference

  B. Roaming threshold

  C. ESSID selection

  D. SSID selection

  Correct Answer: C

• Question 35:

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

  A. Minimum output power level of 2 W

  B. Grid antennas ateach endpoint

  C. A minimum antenna gain of 11 dBi at both endpoints

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

  Correct Answer: D

• Question 36:

  How is throughput capacity scaled in a single channel architecture (SCA) WLAN system?

  A. By increasing transmit power and placing APs that are on a single channel farther from one another.

  B. By adding more SSIDs to existing APs to spread users across different contention domains.

  C. By adding non-overlapping channel layers through the addition of more APs.

  D. By using downlink data compression and uplink flow control at the AP.

  Correct Answer: C

• Question 37:

  For what likely reasons might an organization choose to purchase an AP designed for outdoor deployment to use as an indoor WLAN AP at an industrial facility? (Choose 2)

  A. Aesthetic requirements

  B. Physical security and theft prevention

  C. Protection from environmental conditions

  D. Reduce transient RF interference

  E. 802.11 securitycompliance

  Correct Answer: BC

• Question 38:

  In a single channel architecture (SCA) WLAN system, 802.11n (HT) APs should not share an SSID with 802.11g (ERP) APs.

  What is the reason for this recommendation?

  A. Client stations would see two different sets of AP capabilities as they roam between APs with the same BSSID.

  B. The added range of 802.11n APs would cause additional co-channel interference.

  C. The additional beacon material in 802.11n beacons wouldconfuse 802.11b/g client stations.

  D. Beacons from 802.11n APs use 40 MHz channels, while beacons from 802.11g APs use 20 MHz channels.

  Correct Answer: A

• Question 39:

  In an 802.11n WLAN with a heterogeneous set of associated client devices including 802.11b, 11g, and 11n, what HT protection mode will theBSS 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 40:

  When replacing the antenna of a WLAN device with a similar antenna type that hasa higher passive gain, what antenna characteristic will decrease?

  A. Beam width

  B. Range

  C. Active gain

  D. Receive sensitivity

  Correct Answer: A