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PW0-071 Exam Questions And Answers
What term is used to describe the time differential between a primary signal and areflected signal arriving at a receiver? Path delay Spread spectrumMultipath Delay spread - Answer delay spread Samantha received a gaming system as a gift. She would like to have it communicate withher sister Jennifer's gaming system so that they can play against each other. Which of the following technologies, if deployed in the two gaming systems, should provide for theeasiest configuration of the two systems to communicate with each other? Wi-Fi Personal Wi-Fi DirectS02.I1n CWG-RFWi-Fi Protected Setup - Answer Wi-Fi Direct
A modulated signal capable of carrying data is known as what?Data transmission Communications channelData path Carrier signal - Answer carrier signal Which three properties are interrelated?Frequency, wavelength, and the speed of light
Frequency, amplitude, and the speed of light Frequency, phase, and amplitude
speed of lightAmplitude, phase, and the speed of sound - Answer Frequency, wavelength , and the What is an example of a frequency domain tool that could be used by an RF engineer? OscilloscopeSpectroscope Spectrum analyzer - Answer Spectrum analyzer When the multiple RF signals arrive at a receiver at the same time and are with theprimary wave, the result can be of the primary signal. out of phase, scattering in phase, intersymbol interference in phase, attenuation 180 degrees out of phase, amplification in phase, cancellation 180 degrees out of phase, cancellation - Answer 180 degrees of out of phase, cancellation Which wave properties can be modulated to encode data? (Choose all that apply.)
Which of the following statements are true? (Choose all that apply.) When upfade occurs, the final received signal will be stronger than the originaltransmitted signal.
When downfade occurs, the final received signal will never be stronger than the originaltransmitted signal.
transmitted signal.When upfade occurs, the final received signal will never be stronger than the original When downfade occurs, the final received signal will be stronger than the originaltransmitted signal. - Answer When downfade occurs, the final received signal will never be stronger than the original transmitted signal.
transmitted signal.When upfade occurs, the final received signal will never be stronger than the original A wireless bridge is configured to transmit at 100 mW. The antenna cable and connectorsproduce a 3 dB loss and are connected to a 16 dBi antenna. What is the EIRP? 20mW30dBm 2,000mW36 dBm 8W - Answer 2,000mW WLAN vendors use RSSI thresholds to trigger which radio card behaviors?Receive sensitivity Roaming
RetransmissionsDynamic rate switching - Answer Roaming Dynamic rate switching Select the units of comparison (relative). (Choose all that apply.) dBmdBi DecibeldBd Bel - Answer dBiDecibel dBd Bel 23 dBm is equal to how many mW?200mW 14mW20mW 23mW400mW - Answer 200mW
Which three properties are interrelated? Frequency, wavelength, and the speed of light Frequency, amplitude, and the speed of light
What is the frequency of an RF signal that cycles 2.4 million times per second?2.4 hertz 2.4 MHz 2.4 GHz2.4 kilohertz 2.4 KHz - Answer 2.4MHz When conducting an outdoor survey for a long distance point-to-point bridge, whatshould be documented? Prevailing WindsInterference sources near endpoints Clear Channels All of the Above - Answer all the above Of the following, which would not be of use when conducting an indoor site survey?(Choose two) Contact NamesGPS Digital CameraBlueprints Inclinometer - Answer inclinometer When towers are to be used in an outdoor WLAN deployment what information should begathered? Local Ordinances Planned Tower HeightMicrowave Oven use User Density - Answer Planned tower height
A lift or ladder may be required for an indoor site survey. True False - Answer T A facilities escort may be required when conducting a site survey.True False - Answer T When possible, what should you use to conduct an active survey?The same equipment as selected for deployment
A blueprint of the building being surveyed An RF Jammer The same applications that are to be used in the WLAN - Answer The same applicationsthat are to be used in the WLAN
When conducting a site survey for 5 GHz, what should be documented? X10 Camera placements Microwave oven useCordless Phone use Radar use - Answer Radar use When conducting manual site surveys, which of the following may be of use to the surveyteam? Walkie Talkies?
Ad hocDSSS Infrastructure IBSSPeer-to-peer - Answer Ad hoc IBSSPeer-to-peer
The EDCA medium access method provides for the prioritization of traffic via priority tagsthat are identical to the 802.1D priority tags. What are the EDCA priority tags known as? TXOP UP levels Priority levelsPriority bits PT - Answer UP levels The 802.11 standard defines which medium to be used in a distribution system (DS)?802.3 Ethernet 802.15802.5 token ring Star-bus topology None of the above - Answer none of the above A network consisting of clients and one or more access points with the same SSIDconnected by an 802.3 Ethernet backbone is one example of which 802.11 topology? (Choose all that apply.)ESS Basic service set
Extended service setlBSS Ethernet service set - Answer Extended service set The carrier sense portion of CSMA/CA is performed by using which of the followingmethods? (Choose all that apply.) Virtual carrier sense Physical carrier senseChannel sense window
physical carrier senseClear channel assessment - Answer Virtual carrier sense clear channel assessment What term best describes two access points communicating with each other wirelesslywhile also allowing clients to communicate through the access point? WDS DSDSS DSSSDSM - Answer WDS
If PCF is implemented, it can function in which of the following network environments?(Choose all that apply.) Ad hoc modeBSS IBSSInfrastructure mode BSA - Answer BSS
SNRWMM access categories - Answer Received signal level SNR The WLAN help desk gets a call that all of the sudden, all of the HR-DSSS (802.11b)VoWi-Fi phones cannot connect to any of the ERP (802.11g) lightweight APs that are managed by a multiple-channel architecture WLAN controller. All the laptops with ERP(802.11g) radios can still connect. What are the possible causes of this problem? (Choose all that apply.) The WLAN admin disabled the 1, 2, 5.5, and 11 Mbps data rates on the controller. The WLAN admin disabled the 6 and 9 Mbps data rates on the controller. The WLAN admin enabled the 6 and 9 Mbps data rates on the controller as basic rates.
Mbps data rates on the controller.The WLAN admin configured all the APs on channel 6. - Answer The 1, 2, 5.5, and 11 The WLAN admin enabled the 6 and 9 Mbps data rates on the controller as basic rates. WMM-PS is based on which 802.11-2007 power-management method?S-APSD U-APSD PSMPSM Power Save PS-Poll - Answer U-APSD When is an ERP (802.11g) AP required by the IEEE 802.11-2007 standard to respond toprobe request frames from nearby HR-DSSS (802.11b) stations? (Choose all that apply.)
When the probe request frames contain a null SSID value When the AP supports only ERP-OFDM data rates When the AP supports only HRIDSSS data rates When the Power Management bit is set to 1
request frames contain a null SSID valueWhen the probe request frames contain the correct SSID value - Answer When the probe When the probe request frames contain the correct SSID value After the station has performed the carrier sense and determined that no other devicesare transmitting for a period of a DIFS interval, what is the next step for the station?
has already been selected.Wait the necessary number of slot times before transmitting, if a random back-off value Begin transmitting. Select a random back-off value. Begin the random back-off timer. - Answer Select a random back-off value. Hybrid Coordination Function (HCF) defines what allotted period of time in which astation can transmit multiple frames? Block acknowledgment
an AP. - Answer There are two types of scanning: passive and active.It is common for stations to continue to send probe requests after being associated to
an AP.It is common for stations to continue to send probe requests after being associated to Which of the following are true about beacon management frames? (Choose all thatapply.)
Beacons can be disabled to hide the network from intruders. Time-stamp information is used by the clients to synchronize their clocks. In a BSS, clients share the responsibility of transmitting the beacons.
is used by the clients to synchronize their clocks.Beacons can contain vendor-proprietary information. - Answer Time-stamp information Beacons can contain vendor-proprietary information. When is an ERP (802.11g) AP required by the IEEE 802.11-2007 standard to respond toprobe request frames from nearby HR-DSSS (802.11b) stations? (Choose all that apply.)
When the probe request frames contain a null SSID value When the AP supports only ERP-OFDM data rates When the AP supports only HRIDSSS data rates
When the Power Management bit is set to 1
request frames contain a null SSID valueWhen the probe request frames contain the correct SSID value - Answer When the probe When the probe request frames contain the correct SSID value What would cause an 802.11 station to retransmit a unicast frame? (Choose all thatapply.)
The transmitted unicast frame was corrupted. The ACK frame from the receiver was corrupted. The receiver's buffer was full. The transmitting station will never attempt to retransmit the data frame.
unicast frame was corrupted.The transmitting station will send a retransmit notification. - Answer The transmitted The ACK frame from the receiver was corrupted. What are some of the advantages of using U-APSD and WMM-PS power managementover legacy power-management methods? (Choose all that apply.)
Applications control doze time and trigger frames.
disabled the 1, 2, 5.5, and 11 Mbps data rates on the controller. The WLAN admin enabled the 6 and 9 Mbps data rates on the controller as basic rates. If WMM-PS is not supported, after a station sees its AID set to 1 in the TIM, what typicallyis the next frame that the station transmits? Data PS-PollATIM ACK - Answer PS-Poll If a station is in Power Save mode, how does it know that the AP has buffered unicastframes waiting for it?
By examining the PS-Poll frame By examining the TIM field When it receives an ATIM
Management bit is set to 1When the Power DTIM interval - Answer By examining the TIM field Which of the following are protection mechanisms? (Choose all that apply.)NAV back-off RTS/CTS
RTS-to-SelfCTS-to-Self WEP encryption - Answer RTS/CTS CTS-to-Self Which of the following contains only LLC data and the IP packet, but does not includeany 802.11 data? MPDUPPDU PSDUMSDU MMPDU - Answer MSDU What is the difference between association frames and reassociation frames? (Choose allthat apply,)
Association frames are management frames, whereas reassociation frames are controlframes.
Fast BSS transition only uses reassociation frames. Association frames are used exclusively for roaming. Reassociation frames contain the BSSID of the original AP.
reassociation frames.Only association frames are used to join a BSS. - Answer Fast BSS transition only uses Reassociation frames contain the BSSID of the original AP.
