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q22
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Preguntas del test (30)
1What are three characteristics of the 802.11g standard?
- ASpeed of as much as 11Mb/s
- BBackward-compatibility with 802.11a
- CSpeed of as much as 54Mb/s
- DOFDM and CCK as an additional modulation technique
- EBackward-compatibility with 802.11b
- FOFDM as an additional modulation technique
2Which two devices can interfere with the operation of a wireless network (WLAN) because they operate on similar frequencies? (Choose two)
- AAM Radio
- BIP phone
- CCopier
- DCordless Phone
- EMicrowave oven
3What are three basic parameters to configure on a wireless (WLAN) access point? (Choose three.)
- ASSID
- BTKIP/MIC
- CRTS/CTS
- DAuthentication method
- ERF channel
4Which of the tree following is suggested a guideline to choose non channel bonding when you deploy 802.11n standard? (Choose three.)
- A) You have few voice clients (less than 10 per AP)
- BYou are doing bandwidth-intensive file transfers such as video download wireless backups, etc.
- CYou have lots of voice clients.
- DYou expect to have predominantly 802.11n clients that support 40 MHz Operation
- EYou have lots of non-802.11n capable 5 GHz clients
- FYou will be deploying a transition of mixed 802.11a & 802.11n infrastructure
5Which of the following is the most significantly contributes negative experience in wireless networks?
- APolicing
- BTransmission
- CInfection
- DInterference
6An 802.11a radio card can transmit on __________ frequency and uses ____________ modulation technology.
- A2.4 GHz, DSSS
- B5 MHz, OFDM
- C2.4 GHz, OFDM
- D5 GHz, OFDM
7Choose all non-overlapping channels in 2.4 GHz band in North America.
- A5
- B6
- C14
- D1
- E11
- F9
8Which of the following modulation techniques do WLANs today use? (Choose two)
- AAM
- BOFDM
- CDSSS
- DFM
9When deploying an 802.11g wireless network with only two access points, which of these channel grouping would be considered nonoverlapping?
- AChannels 5 and 11
- BChannels 3 and 8
- CChannels 6 and 10
- DChannels 1 and 3
10Which of the following is the modulation technique used to provide 54Mbps with OFDM?
- ADSSS
- BQPSK
- CBPSK
- DQAM
11Which physical layer modulation technology is common to both the IEEE 802.11g and the IEEE 802.11a standards?
- ACCK
- BBPSK
- COFDM
- DDSSS
12What is the maximum data rate that the 802.11g protocol supports?
- A54 MBPS
- B22 MBPS
- C48 MBPS
- D90 MBPS
13Assuming all channels are supported by a 5 GHz AP, how many possible channels can be configured on the AP?
- A11
- B4
- C12
- D23
14The network administrator has used VLANs to separate VoIP frames from data frames in the wired network. What must the administrator use to separate those frames in the wireless network?
- AMultiple 802.11 radios (a,b,g,n)
- BMultiple channels
- CMultiple SSIDs
- DMultiple authentications
- EMultiple WEP or WPA keys
15Which of the following 802.11n technology utilizes multipath to amplitude signal strength?
- AMaximal Ratio Combining (MRC)
- BChannel Aggregation
- CTransmit Beamforming (TxBF)
- DSpatial Multiplexing (SM)
16With 2.4-GHz band, how wide of each non overlapping channel is?
- A24 MHz
- B5 MHz
- C28 MHz
- D22 MHz
17Which of the following are benefits of the 802.11ac standard? (Choose three.)
- AChannel Bonding 80 MHz
- BMIMO
- CChannel Bonding 40 MHz
- DMU-MIMO
- E128-QAM modulation
- F256-QAM modulation
18What protection method is used by 802.11g clients when an 802.11b client is in the cell?
- ARTS to self
- BLMI
- CRTS/CTS
- DRSSI
19Which of the following statements are correct? (Choose three.)
- AThe advantage of 2.4 GHz and 5 GHz bands is that they are not very occupied
- BIt is free to transmit in ISM (Industrial Scientific Medical) band
- CWireless is always full duplex because of communication environment
- DHigh modulation technique is required for high bandwidth
- EWireless is always half duplex
20How does 802.11n improve the throughput with acknowledgments?
- AIt uses block acknowledgments.
- BIt does not use acknowledgments
- CIt uses a 1-for-1 acknowledgment option; 1 sent = 1 acknowledged
- DIt uses a 2-to-1 ratio of sent frames to acknowledgments
21Which modulation technique allows you to achieve a data rate of 54Mbs in the 2.4GHz-band?
- AQuadrature Amplitude Modulation (QAM)
- BDifferential Quadrature Phase Shift Keying (DQPSK)
- CDifferential Binary Phase Shift Keying (DBPSK)
- DComplimentary Code Keying (CCK)
22What type of multiplexing does 802.11n use?
- ADSSS
- BFHSS
- COFDM
- DSpatial
23How does 802.11n standard increase throughput at the Physical layer? (Choose three.)
- ASpatial multiplexing
- B40 MHz channels
- CTransmit beamforming
- DA-MPDU
- EDual-CTS protection
24When 802.11b clients are in an 802.11b/g cell, what information will be in the AP beacon frame?
- ANON_ERP present: yes; Use Protection: no
- BNON_ERP present: no; Use Protection: no
- CNON_ERP present: no; Use Protection: yes
- DNON_ERP present: yes; Use Protection: yes
25How does Transmit Beamforming (TxBF) use multiple MIMO antennas to increase range?
- ABeamsteering based on feedback from both the transmitter and receiver
- BSpatial multiplexing based on feedback from both the transmitter and receiver
- CDynamic beamforming based on feedback from both the transmitter and receiver
- DPhase adjustments based on feedback from both the transmitter and receiver
26What speeds must be disabled in a mixed 802.11b/g WLAN to allow only 802.11g clients to connect?
- A1, 2, 5.5, 11
- B1, 2, 5.5, 6
- C5.5, 6, 9, 11
- D6, 9, 12, 18
27An 802.11n AP indicates 2×3:2 MIMO systems, how many unique streams of data can transmit and receive?
- AThree
- BThree equal and four unequal streams
- CFour
- DTwo
28Which regulatory body oversees to ensure compatibility between solutions in WLAN?
- AWi-Fi Alliance
- BETSI
- CCRTC
- DIEEE
- EFCC
29OFDM uses how many data carriers when transmitting data?
- A52
- B54
- C36
- D48
30The 5.0-GHz range is used by which two of the following 802.11 standards?
- A802.11a
- B802.11b/g
- C802.11n
- D802.11g
Información
- Descripción
- 2 WIRELESS Test sobre q22, creado por michael.0lsn el 23/04/2016.
- Autor
- michael.0lsn
- Idioma
- English
- Visitas
- 18
- Etiquetas
- Valoración
- Aún sin valoraciones Valora este test