CWNA-107無料問題集「CWNP Certified Wireless Network Administrator」

質問 1

You are reporting on the RF environment in you facility. The manager asks you do describe the noise floor noted in the report. Which of the following is the best explanation?

（A）The energy radiated by flooring materials that causes interference in the 2.4 GHz and 5 GHz bands.

（B）The extra energy radiated by access points and clint devices beyond that intended for the signal.

（C）The noise caused elevators, microwave ovens, and video transmitters.

（D）The RF energy that exists in the environment from intentional and unintentional RF radiators that forms the baseline above which the intentional signal of your WLAN must exist.

正解：D 解答を投票する

質問 2

Your consulting firm has recently been hired to complete a site survey for a company. Your engineers use predictive modeling software for surveying, but the company insists on a pre- deployment site visit.
What task should be performed as part of the pre-deployment visit to prepare for a predictive survey?

（A）Test several antenna types connected to the intended APs for use in the eventual deployment.

（B）Install at least one AP on each side of the exterior walls to test for co-channel interference through these walls.

（C）Evaluatethe building materials at ABC's facility and confirm that the floor plan documents are consistent with the actual building.

（D）Collect information about the company's security requirements and the current configuration of their RADIUS and user database servers.

正解：C 解答を投票する

質問 3

Two co-located 802.11b/g/n APs can interfere with one another and cause contention and collisions, even when the two APs are operating on non-overlapping channels (e.g. 1 & 6).
What deployment flaw could cause this problem?

（A）A client station is using active scanning to probe for access points on multiple channels.

（B）The access points are not synchronized to the same NTP server.

（C）The access points are mounted too closely to one another.

（D）Reflective objects in the area are causing significant multipath.

正解：C 解答を投票する

質問 4

When considering data rates available in HT and VHT PJY devices, in addition to the modulation, coding, channel width, and spatial streams, what impacts the data rate according to the MCS tables?

（A）The guard interval

（B）The client drivers

（C）The height of the antennas

（D）The Frequency band in use

正解：A 解答を投票する

質問 5

You have been tasked with creating a wireless link between two buildings on a single campus.
The link must support at least 150 Mbps data rates.
What kind of WLAN technology role should you deploy?

（A）Wireless bridging

（B）WPAN

（C）IBSS

（D）Access BSS

正解：C 解答を投票する

質問 6

An 802.11 based network uses an AP and has several connecting clients. The clients include iPhones, IPads, laptops and one desktop. What WLAN use case is represented?

（A）BSS

（B）Ad-hoc

（C）WPAN

（D）IBSS

正解：A 解答を投票する

質問 7

In an 802.11n 2.4 GHz BSS, what prevents each station from using the full network data rate (e.g. 216.7 Mbps) for user data when multiple clients are actively exchanging data with the AP?

（A）Half of the bandwidth is allocated to uplink traffic and half to downlink traffic

（B）APs do not have sufficient wired connection speeds to the LAN, even at 1 Gbps connections, with
802.11n and earlier APs

（C）Radio receiver hardware cannot process data is quickly as it can be transmitted

（D）All data frames must be acknowledged and the medium is shared

正解：D 解答を投票する

質問 8

A WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB loss.
If the cable is connected to an antenna with 9 dBi gain, what is the EIRP at the antenna element?

（A）10 dBm

（B）13 dBm

（C）23 dBm

（D）26 dBm

正解：C 解答を投票する

質問 9

You are using a site survey tool for post-implementation validation. You have installed the appropriate adapter driver and imported a floor plan. Now, you want to take the next step in proper tool use. What must you do before gathering survey data after the floor plan is imported?

（A）Calibrate the floor plan

（B）Install WinPCAP

（C）Nothing, you can simply start capturing signal readings

（D）Install iPerf

正解：A 解答を投票する

質問 10

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

（A）Beamwidth

（B）Receive sensitivity

（C）Range

（D）Active gain

正解：A 解答を投票する

CWNA-107 無料問題集「CWNP Certified Wireless Network Administrator」

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