Quiz
Wireless Chapter 6
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Perguntas do quiz (20)
1Which of the following are valid ISM bands?
- A902 MHz - 928 MHz
- B2.4 GHz - 2.5 GHz
- C5.725 GHz - 5.85 GHz
- D5.725 GHz - 5.875 GHz
2Which of the following are valid U-NII bands?
- A5.150 GHz - 5.250 GHz
- B5.470 GHz - 5.725 GHz
- C5.725 GHz - 5.85 GHz
- D5.725 GHz - 5.875 GHz
3Which technologies are used in the 2.4 GHz ISM band?
- AFHSS
- BERP
- CDSSS
- DHR-DSSS
4802.11n (HT radios) can transmit in which frequency bands?
- A2.4 GHz - 2.4835 GHz
- B5.47 GHz - 5.725 GHz
- C902 GHz - 928 GHz
- D5.15 GHz - 5.25 GHz
5In the U-NII-1 band, what is the center frequency of channel 40?
- A5.2 GHz
- B5.4 GHz
- C5.8 GHz
- D5.140 GHz
6What is the channel and band of a Wi-Fi tranmission whose center frequency is 5.3 GHz?
- AU-NII-1 channel 30
- BU-NII-1 channel 60
- CU-NII-2 channel 30
- DU-NII-2 channel 60
7The 802.11-2012 standard requires how much separation between center frequencies for HR-DSSS channels to be considered nonoverlapping?
- A22 MHz
- B25 MHz
- C30 MHz
- D35 MHz
- E40 MHz
8What describes 'hop time'?
- AThe period of time that the transmitter waits before hopping to the next frequency
- BThe period of time that the standard requires when hopping between frequencies
- CThe period of time that the transmitter takes to hop to the next frequency
- DThe period of time the transmitter takes to hop through all of the FHSS frequencies
9As defined by the IEEE-2012 standard, how much separation is needed between center frequencies of channels in the U-NII-2 Extended band?
- A10 MHz
- B20 MHz
- C22 MHz
- D25 MHz
- E30 MHz
10When deploying an 802.11g (ERP-OFDM) wireless network with only two access points, which of these channel groupings would be considered nonoverlapping?
- AChannels 1 & 3
- BChannels 7 & 10
- CChannels 3 & 8
- DChannels 5 & 11
- EChannels 6 & 10
11Which spread spectrum technology specifies data rates of 22 Mbps and 33 Mbps?
- ADSSS
- BERP-PBCC
- COFDM
- DPPtP
12If data is corrupted by previous data from a reflected signal, this is known as what?
- ADelay spread
- BISI
- CForward error creation
- DBit crossover
13Assuming all channels are supported by a 5 GHz access point, how many possible 20 MHz channels can be configured on the access point?
- A4
- B11
- C12
- D25
14Which of these technologies is the most resilient against the negative effects of multipath?
- AFHSS
- BDSSS
- CHR-DSSS
- DOFDM
15HR-DSSS calls for data rates of 5.5 Mbps, and 11 Mbps. What is the average amount of aggregate throughput percentage at any data rate when legacy 802.11a/b/g radios are transmitting?
- A80%
- B75%
- C50%
- D100%
16What are the names of the two additional U-NII bands proposed by the FCC that provide for 195 MHz of additional spectrum at 5 GHz?
- AU-NII-1
- BU-NII-2A
- CU-NII-2B
- DU-NII-2C
- EU-NII-3
- FU-NII-4
17In the US, 802.11 radios were not allowed to transmit on which range of frequencies to avoid interference with Terminal Doppler Weather Radar (TDWR) systems?
- A5.15 GHz - 5.25 GHz
- B5.25 GHz - 5.25 GHz
- C5.60 GHz - 5.65 GHz
- D5.85 GHz - 5.925 GHz
18What are the modulation types used by OFDM technology?
- AQAM
- BPhase
- CFrequency
- DHopping
19The Barker code converts a bit of data into a series of bits that are referred to as what?
- AChipset
- BChips
- CConvolutional code
- DComplementary code
20A 20 MHz OFDM channel uses how many 312.5 KHz data subcarriers when transmitting?
- A54
- B52
- C48
- D36
Informações
- Descrição
- Quiz sobre Wireless Chapter 6, criado por Kyle Boehmer em 01-10-2018.
- Autor
- Kyle Boehmer
- Idioma
- English
- Visualizações
- 1
- Avaliação
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