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[dotfiles/.git] / .config / Typora / draftsRecover / 2019-9-30 anse 202210.md

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-+ What CSMA/CA mechanism is used for medium contention? (Choose all that apply.) 
-
-1. NAV
-2. CCA
-3. **Random backoff timer**
-4. Contention window
-
-+ Which field in the MAC header of an 802.11 frame resets the NAV timer for all listening 802.11 stations? 
-
-1. NAV
-2. Frame control
-3. **Duration/ID**
-4. Sequence number
-5. Strictly ordered bit
-
-+ The 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? 
-+ TXOP
-+ **Access categories**
-+ Priority levels
-+ Priority bits
-+ PT
-
-+ ACKs are required for which of the following frames? 
-
-1. **Unicast**
-2. Broadcast
-3. Multicast
-4. Anycast
-
-+ What QoS mechanism can be used to reduce medium contention overhead during a frame burst of low-latency traffic?  
-
-1. Delayed Block ACK
-2. Contention period
-3. Contention window
-4. Contention-free period
-5. **Immediate Block ACK**
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