CWNP CWNP Certifications CWNA-106 Questions & Answers

• Question 51:

  What problem may exist for a multiple channel architecture(MCA) WLAN when its APs are all operating at full power (typically 100mW)?

  A. WLAN client stations can experience the hidden node problem when located near each other within the same cell.

  B. The mismatched power between WLAN client stations and APs violates regulatory and IEEE signal quality requirements.

  C. Cell size may be too large, causing co-channel interference to adjacent cells and reducing system capacity.

  D. APs operating in the 2.4 GHz band would prevent microwave ovens and analog video camerasfrom functioning.

  Correct Answer: A

• Question 52:

  What term describes the effect of increasing the intensity of an RF wave withan antenna by focusing the energy in a specific direction?

  A. Distributed Radiation

  B. Active Amplification

  C. Beam Compression

  D. Passive Gain

  E. RF Flooding

  Correct Answer: D

• Question 53:

  Which one of the following channels can be used for VHT transmissions?

  A. 11

  B. 6

  C. 48

  D. 1

  Correct Answer: D

• Question 54:

  An 802.11 WLAN transmitter thatemits a 50 mW signal is connected to a cable with 3 dB of loss. The cable is connected to an antenna with 16 dBi of gain.

  What is the EIRP power output?

  A. 2 mW

  B. 500 mW

  C. 250 mW

  D. 1000 mW

  Correct Answer: D

• Question 55:

  Which IEEE 802.11 physical layer (PHY) specifications include support for and compatibility of both OFDM and HR/DSSS? (Choose 2)

  A. HR/DSSS (802.11b)

  B. OFDM (802.11a)

  C. ERP (802.11g)

  D. HT (802.11n)

  E. CCK (802.11b)

  F. VHT (802.11ac)

  Correct Answer: CD

• Question 56:

  Users and Network support personnel at a mid-sized equipment manufacturer have been discussing the potentialuses and benefits of implementing an indoor WLAN. The network administrator and network manager have requested a meeting of senior management personnel to discuss a WLAN implementation before performing a site survey or taking any implementation steps. Thefirst topic of discussion in the meeting is the corporate policy concerning implementation and use of WLAN technology.

  What specific topics are appropriate in this policy meeting? (Choose 2)

  A. Use of the latest 802.11ac equipment

  B. Businessjustification

  C. User productivity impact

  D. Antenna types

  E. Defining RF channels for use

  Correct Answer: BC

• Question 57:

  The IEEE 802.11-2012 standard requires VHT capabledevices to be backward compatible with devices using which other 802.11 physical layer specifications (PHYs)? (Choose 2)

  A. HT

  B. OFDM

  C. HR/DSSS

  D. ERP-PBCC

  E. DSSS-OFDM

  Correct Answer: AB

• Question 58:

  ABC Hospital is planning a Wi-Fi infrastructure upgrade wherethe 802.11b/g APs (HR/DSSS and ERP)

  would be replaced with new dual-radio 802.11n/802.11ac (HT and VHT) APs. ABC wants to minimize the

  time and cost associated with performing a new site survey, so they will be mounting all of the new APs in

  the same locations and with the same cable drops as the existing APs.

  What is one performance drawback with this deployment method?

  A. Multipath will increase, causing excessive layer-2 retransmissions. The retransmissions will cause latency for VoWiFi handsets.

  B. Increased receiver sensitivity on theVHT APs will cause them to continually change channels to avoid co-channel interference.

  C. If the existing UTP cabling is not Category 3 or better, the total Ethernet backhaul for each AP will be limited to 100 Mbps.

  D. The existing WLAN plan, including the AP locations, may not provide the benefits seen in HT and VHT

  802.11 PHY capabilities.

  Correct Answer: D

• Question 59:

  What feature(s) are most likely to be supported by 802.11 enterprise-class WLAN controllers? (Choose 4)

  A. Link aggregation / port trunking

  B. 802.1p and DSCP QoS

  C. BGP and Frame Relay

  D. Captive web portals

  E. IGMP snooping

  Correct Answer: ABDE

• Question 60:

  ABC Company has thousands of Wi-Fi users accessing their network ona daily basis. Their WLAN consists of 700 access points, 6 WLAN controllers, and a wireless network management system.

  What network functions are performed by the enterprise-class WNMS? (Choose 3)

  A. RF pre-deployment planning and post-deployment reporting of access point locations on a floor plan

  B. Performance and security monitoring of WLAN controllers with alarms and notifications for administrative staff

  C. Radio management, fast roaming, key caching, and othercentralized control plane operations

  D. Centralized bridging of guest data traffic and application of firewall and QoS policies to data

  E. Management of WLAN controller configuration and provisioning of firmware updates

  F. Generating, encrypting, and decrypting 802.11 frames and collecting RF radio data.

  Correct Answer: ABE