Quiz
Wireless Chapter 8
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Perguntas do quiz (20)
1DCF is also known as what?
- ACarrier Sense Multiple Access with Collision Detection
- BCarrier Sense Multiple Access with Collision Avoidance
- CData Control Function
- DDistributed Coordination Function
2802.11 collision detection is handled using which technology?
- ANetwork allocation vector
- BClear channel assessment
- CDuration/ID value
- DReceiving an ACK from the destination station
- EPositive collision detection cannot be determined
3ACK and CTS-to-self frames follow which interframe space?
- AEIFS
- BDIFS
- CPIFS
- DSIFS
- ELIFS
4The carrier sense portion of CSMA/CA is performed by using which of the following methods?
- AVirtual carrier sense
- BPhysical carrier sense
- CChannel sense window
- DClear channel assessment
5After the station has performed the carrier sense and determined that no other devices are transmitting for a period of a DIFS interval, what is the next step for the station?
- AWait the necessary number of slot times before transmitting if a random backoff value has already been selected
- BBegin transmitting
- CSelect a random backoff value
- DBegin the random backoff timer
6If PCF is implemented, it can function in which of the following network environments?
- AAd hoc mode
- BBSS
- CIBSS
- DInfrastructure mode
- EBSA
7Which of the following terms are affiliated with the virtual carrier sense mechanism?
- AContention window
- BNetwork allocation vector
- CRandom backoff time
- DDuration/ID field
8The goal of allocation equal time as opposed to equal opportunity is known as what?
- AAccess fairness
- BOpportunistic media access
- CCSMA/CA
- DAirtime fairness
9CSMA/CA and DCF define which mechanisms that attempt to ensure that only one 802.11 radio can transmit on the half-duplex RF medium?
- ARandom backoff timer
- BNAV
- CCCMP
- DCCA
- EInterframe spacing
10The Wi-Fi Alliance certification called Wi-Fi Multimedia (WMM) is based on which media access method defined by the 802.11-2012 standard?
- ADCF
- BPCF
- CEDCA
- DHCCA
- EHSRP
11Hybrid Coordination Function defines what allocated period of time in which a station can transmit multiple frames?
- ABlock acknowledgement
- BPolling
- CVirtual Carrier Sense
- DPhysical carrier sense
- ETXOP
12WMM is based one EDCA and provides for traffic prioritization via which of the following access categories?
- AWMM Voice priority
- BWMM Video priority
- CWMM Audio priority
- DWMM Best Effort priorotiy
- EWMM Background priority
13The 802.11e amendment defines which of the following medium access methods to support QoS requirements?
- ADCF
- BEDCA
- CHCF
- DPCF
- EHCCA
14What information that comes from the wired network is used to assign traffic into access categories on a WLAN controller?
- ADuration/ID
- B802.1D priority tags
- CDestination MAC address
- DSource MAC address
15What are the two reasons that 802.11 radios use physical carrier sense?
- ATo synchronize incoming transmissions
- BTo synchronize outgoing transmissions
- CTo reset the NAV
- DTo start the random backoff timer
- ETo assess the RF medium
16What CSMA/CA mechanism is used for medium contention?
- ANAV
- BCCA
- CRandom backoff timer
- DContention window
17Which field in the MAC header of an 802.11 frame resets the NAV timer for all listening 802.11 stations?
- ANAV
- BFrame control
- CDuration/ID
- DSequence number
- EStrictly ordered bit
18The EDCA medium access method provides for the prioritization of traffic via priority queues that are matched to eight 802.1D priority tags. What are the EDCA priority queues called?
- ATXOP
- BAccess categories
- CPriority levels
- DPriority bits
- EPT
19ACKs are required for which of the following frames?
- AUnicast
- BBroadcast
- CMulticast
- DAnycast
20What QoS mechanism can be used to reduce medium contention overhead during a frame burst of low-latency traffic?
- ADelayed Block ACK
- BContention period
- CContention window
- DContention-free period
- EImmediate Block ACK
Informações
- Descrição
- Quiz sobre Wireless Chapter 8, criado por Kyle Boehmer em 08-10-2018.
- Autor
- Kyle Boehmer
- Idioma
- English
- Visualizações
- 4
- Avaliação
- Ainda sem avaliações Avalie este quiz