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CWNA
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Preguntas del test (40)
1Which of the following organizations performs compatibility testing of 802.11 hardware?
- AIETF
- BWi-Fi Alliance
- CFCC
- DMIC
2You must locate information within the 802.11 standard to understand the details of Beacon frame options. what organization provides a website that you can use to gain access to the 802.11 standard.
- AIEEE
- BFCC
- CITU-R
- DWi-Fi Alliance
3Your organization has decided to install a WLAN in their warehouse facility. the warehouse is approximately 400 meters from the main building and it has no Ethernet or other wired network connection run between the main building and the warehouse. Which of the following wireless technologies will most likely be used to provide a link between the main building and warehouse?
- AWPAN
- BWMAN
- CWWAN
- DWLAN
4What IEEE standard specified a port-based authentication solution?
- A802.3
- B802.1X
- C802.1Q
- D802.1D
5What frequency bands are most commonly used by WLAN hardware?
- A2.4 GHz and 5 GHz
- B2.4 GHz and 100 GHz
- C5 GHz and 10 MHz
- DNone of these
6What is indicated when a device is certified by the WiFi alliance as 802.11b/g/n certified
- AIt is a 5 GHz only device
- BIt is a 2.4 GHz only device
- CIt supports WPA2 enterprise
- DIt supports WPA personal.
7What is based on an IETF document and defines communications between a lightweight access point and a controller.
- ACAPWAP
- B802.1Q
- CEAP
- DRADIUS
8What WiFi alliance certification ensures proper voip communications even when moving from one access point to another.
- AWMM
- BVoice personal
- CVoice enterprise
- DWPS
9You have purchased an AP for a specific regulatory domain. You know that you cannot turn up the transmit power beyond a specific level. What is the likely cause of this behavior.
- AFirmware problems
- BRadio failure
- CRegulatory constraints.
- DIEEE constraints
10In what mode is an access point operating when clients connect to it in order to gain access to a printer.
- ADistribution
- BCore
- CAccess
- DNone of these
11What denotes the strength of an RF wave or signal.
- AWavelength
- BPhase
- CAmplitude
- DModulation.
12What is decreased as the frequency of the wave increases
- AWavelength
- BPhase
- CModulation.
- Dcoding.
13What RF behavior is similar to light waves as seen in a mirror.
- AAbsorption
- BAttenuation
- CReflection
- DPhase
14What kind of modulation is not used in WLANs
- APSK
- BFSK
- CASK
- DBPSK
15What is the common ohm rating in equipment designed for the use in WLANs
- A75
- B50
- C25
- D100
16What happens when RF energy is converted to heat when passing through some materials.
- Aabsorption
- Breflection
- Cphase shifting
- Dfrequency shifting
17What phenomenon is good for MIMO systems, but must be handled with something like diversity in SISO systems?
- AModulation
- BMultipath
- CFSPL
- DRefraction
18What amount of additional signal strength doubles the usable range of an RF signal in free space.
- A2 dB
- B3 dB
- C6 dB
- D10 dB
19What comparative attribute relates an RF wave to another Wave
- AWavelength
- BFrequency
- CAmplitude
- DPhase
20What occurs as an RF signal moves through space and spreads to cover an ever larger area?
- AAmplification
- BFSPL
- CVSWR
- DDiffraction
21What metric is often used for indoor access point output power definition
- AW
- BRSSI
- CmW
- DdBd
22What signal metric has become very popular for both transmit and receive power levels?
- AW
- BRSSI
- CdBm
- DdBi
23Why is the RSSI metric not typically a good signal metric for comparison across vendors?
- AEach vendor specifies the RSSI percentage formula differently
- BEach vendor specifies the RSSI_MAX value differently
- CRSSI is no longer supported in WLAN devices
- DRSSI is not a signal metric; it is a modulation method
24You start with a power level of 50 mW and add 7 dB, what is the resulting power level?
- A500 mW
- B100 mW
- C200 mW
- D250 mW
25An AP has an output power setting of 20 dBm. The antennas provide 5 dB of gain. What is the EIRP?
- A500 mW
- B320 mW
- C3200 mW
- D4 W
26An AP has an output power setting of 13 dBm. the antenna is directly connected and has a 3 dBi gain. What is the output power at the intentional radiator?
- A400 mW
- B40 mW
- C100 mW
- D20 mW
27How do you calculate the dBi of an antenna when the gain is provided in dBd?
- ASubtract 2.14
- BAdd 2.14
- CMultiply by 2.14
- DDivide by 2.14
28You are calculating an outdoor bridge link. You have determined the bridge output power levels, antenna gain and losses incurred by all cables and connectors on both ends. What additional factor is missing.
- AFSPL
- BRSSI
- CFade Margin
- DWind resistance
29You are calculating power levels and have been given the following values: +3 dB, +5 dB, -21 dB, +11 dB, and +3 dB. How can you simplify the calculation?
- Ajust use the value +1 dB
- BIgnore the negative values
- CIgnore the positive values
- DYou cannot simplify it you must calculate all dB changes in sequence
30What metric is preferred by engineers and is used to represent received signal strength?
- ARSSI
- BdB
- CdBm
- DFrequency
31When creating an outdoor bridge link, what is the recommended clearance for the first Fresnel zone?
- A60%
- B80%
- C20%
- D40%
32You are creating a bridge link that spans 12 miles. You have inspected the area to identify trees and other interferers. what else should be considered.
- AWeather in the area
- BDaytime vs. night time propagation
- CEarth bulge
- DOther RF signals between the two endpoints
33You are selecting an antenna for a MIMO AP that supports external antennas. You want to mount the antenna on the wall at the exterior of the target coverage area. What kind of antenna should you use?
- AYagi
- BOmni
- CGrid
- DPatch
34You are creating a very long distance bridge link in an area known for high winds. What kind of antenna would be useful for this scenario?
- AParabolic dish
- BOmni
- CPatch
- DGrid
35What kind of lighting arrestor is best for direct lighting strikes
- AQuick response arrestor
- BLead arrestor
- CWater-based arrestor
- DNo lighting arrestor protects against direct strikes
36At what signal loss level is the beam width of an antenna calculated
- A6 dB
- B10 mW
- C3 dB
- D25 mW
37Why are Yagi and semi-directional SISO antennas less popular for indoor WLAN deployments today?
- AThey are no longer supported by vendors
- BThey can't transmit OFDM signals
- CThey do not provide the capacity needed in modern WLANs
- DThey do not provide the signal quality of dipole antennas
38What receiver technology was introduced in 802.11n and allows the receiver to combine multiple copies of the received signal from multiple antennas to increase received signal strength
- ASpatial multiplexing
- BMRC
- CTransmit Beamforming
- D40 MHz Channels
39What is another term often used for an elevation chart?
- AHorizontal chart
- BVertical chart
- CH-plane chart
- DBeamwdith chart
40Which antenna specification defines the highest gain antenna?
- A7 dBi
- B6 dBd
- CStandard dipole
- DIsotropic Radiator
Información
- Descripción
- Information Technology Test sobre CWNA, creado por Jordan Wright el 01/12/2017.
- Autor
- Jordan Wright
- Idioma
- English
- Visitas
- 13
- Etiquetas
- Valoración
- Aún sin valoraciones Valora este test