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PW0-105 Online Practice Questions and Answers

Questions 4

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

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Questions 5

In a long-distance RF link, what statement about Fade Margin is true?

A. Fade Margin is an additional pad of signal strength designed into the RF system to compensate for unpredictable signal fading.

B. The Fade Margin of a long-distance radio link should be equivalent to the receiver's antenna gain.

C. A Fade Margin is unnecessary on a long-distance RF link if more than 80% of the first Fresnel zone is clear of obstructions.

D. The Fade Margin is a measurement of signal loss through free space, and is a function of frequency and distance.

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Questions 6

Given: ABC Hospital is planning a Wi-Fi infrastructure upgrade where the 802.11b/g APs would be replaced with new dual-radio HT (802.11n) 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 the HT APs will cause them to continually change channels to avoid co-channel interference.

C. If the existing UTP cabling is not Category 6 or better, the total Ethernet backhaul for each AP will be limited to 100 Mbps.

D. In locations with line-of-sight to client devices and little multipath, the benefits of MIMO may be less significant than in other areas.

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Questions 7

Given: 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 would confuse 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.

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Questions 8

Given: XYZ Corporation is experiencing connectivity problems with their existing building-to-building bridge link. A concrete wall on the roof of one building is partially blocking the Fresnel Zone, and the connection is dropping many frames. The administrator moves the antenna to an area not obstructed by the concrete wall and then realizes the RF cable cannot reach the new location.

If an extension cable is added to move the antenna, what are the likely results?

A. The data throughput rate will increase because VSWR will decrease.

B. The Equivalent Isotropically Radiated Power (EIRP) will decrease.

C. The antenna's azimuth beamwidth will decrease.

D. The size of the Fresnel zone will increase.

E. The likelihood of a direct lightning strike will increase.

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Questions 9

Given:

The center frequency of channel 1 in the 2.4 GHz ISM band is 2.412 GHz (2412 MHz).

What is the center frequency of channel 2?

A. 2.413 GHz

B. 2.417 GHz

C. 2.422 GHz

D. 2.432 GHz

E. 2.437 GHz

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Questions 10

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

A. Wi-Fi enabled voice handsets with low transmit power can experience asynchronous downlink and uplink performance.

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

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

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

E. APs operating in the 2.4 GHz band would prevent microwave ovens and analog video cameras from functioning.

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Questions 11

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

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Questions 12

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

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Questions 13

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.

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Questions 14

What factors will have the most significant affect on the amount of wireless bandwidth available to each station within a BSS? (Choose two)

A. The number of client stations associated to the BSS

B. The power management settings in the access point's beacons

C. The presence of co-located (10m away) access points on non-overlapping channels

D. The data rates at which nearby client stations are transmitting and receiving data

E. The layer 3 protocol used by each station to transmit data over the wireless link

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Questions 15

Given: You are on-site to perform a post-deployment site survey. When verifying a multiple channel VoWiFi deployment using a VoWiFi handset, which aspect is most important?

A. Performing protocol analysis with a single wireless adapter that is scanning all channels in use

B. Testing a constant conversation or handset tone while roaming from area to area, or performing an active survey

C. Configuring DSCP-to-802.11e QoS maps on the handset for each access category.

D. Verifying the orientation/polarity of all omni-directional antennas in use by the VoWiFi clients.

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Questions 16

If an 802.11 RF transmission reaches a receiving antenna simultaneously by direct and indirect (reflected) paths, what effect will the reflected signal have on the signal that took the direct line-of- sight path?

A. The direct signal will only be received if the reflected signal is more than 180 degrees out of phase.

B. The direct signal cannot be received if the indirect signal is less than 90 degrees out-of-phase.

C. The signals will be distorted if the indirect signal arrives simultaneously at the receiver, but 90 degrees out-of-phase.

D. If the signals are in-phase, they will combine together, cancel one another out, and create a null.

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Questions 17

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

A. Dipole

B. Patch

C. Dish

D. Grid

E. Sector

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Questions 18

Given: XYZ Company is planning to install a new 802.11 WLAN, but wants to upgrade its wired infrastructure first to provide the best user experience possible. XYZ has hired you to perform the RF site survey. During the interview with the network manager, you are told that the new Ethernet edge switches will support VoIP phones and 802.11 access points, both using 802.3af PoE.

After hearing this information, what immediate concerns do you note?

A. VoIP phones and 802.11 access points should not be powered by the same edge switch due to distortion.

B. The edge Ethernet switches will need to support 802.3at PoE in order to support both access points and VoIP phones.

C. If the switches are in optimal locations for VoIP phones, they are likely to be suboptimal locations for

802.11 APs.

D. The power budget in the edge switches must be carefully planned and monitored based on the number of supported PoE devices.

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Exam Code: PW0-105
Exam Name: Certified Wireless Network Administrator (CWNA)
Last Update: Mar 23, 2024
Questions: 125 Q&As

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