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Questions and Answers
In p-persistent CSMA, what does a node do once the medium is no longer busy?
In p-persistent CSMA, what does a node do once the medium is no longer busy?
- Decides to transmit with a certain probability (correct)
- Waits for a random backoff and then re-senses the channel
- Continuously senses the channel until it becomes idle
- Starts transmitting immediately
What is the basis of Wi-Fi's CSMA method?
What is the basis of Wi-Fi's CSMA method?
- p-persistent CSMA (correct)
- Non-persistent CSMA
- Slotted Aloha
- Random backoff
What does a node do in non-persistent CSMA when it finds the channel busy?
What does a node do in non-persistent CSMA when it finds the channel busy?
- Decides to transmit with a certain probability
- Continuously senses the channel until it becomes idle
- Starts transmitting immediately
- Waits for a random backoff and then re-senses the channel (correct)
What does p represent in p-persistent CSMA?
What does p represent in p-persistent CSMA?
Which CSMA method involves continuously sensing the channel until it becomes idle?
Which CSMA method involves continuously sensing the channel until it becomes idle?
What does the throughput metric (S) in MAC protocols represent?
What does the throughput metric (S) in MAC protocols represent?
Which metric quantifies the time separating when a frame is given to the MAC layer and when it is sent?
Which metric quantifies the time separating when a frame is given to the MAC layer and when it is sent?
In modeling assumptions for MAC protocols, what type of distribution does the offered load (G) respect?
In modeling assumptions for MAC protocols, what type of distribution does the offered load (G) respect?
What is the performance impact of loss due to synchronization and guard intervals in deterministic MAC protocols?
What is the performance impact of loss due to synchronization and guard intervals in deterministic MAC protocols?
Which performance evaluation method states that all transmissions eventually converge to zero?
Which performance evaluation method states that all transmissions eventually converge to zero?
In probabilistic MAC protocols, what leads to a decrease in the network's ability to absorb offered load?
In probabilistic MAC protocols, what leads to a decrease in the network's ability to absorb offered load?
In Slotted Aloha, how does the improvement help in reducing collisions?
In Slotted Aloha, how does the improvement help in reducing collisions?
Which statement best describes the concept of Clear Channel Assessment (CCA) in random access with channel sensing?
Which statement best describes the concept of Clear Channel Assessment (CCA) in random access with channel sensing?
What is the main purpose of CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) in avoiding collisions?
What is the main purpose of CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) in avoiding collisions?
In CSMA 1-persistent method, what does a node do if the channel is busy?
In CSMA 1-persistent method, what does a node do if the channel is busy?
Which statement best describes p-persistent CSMA in terms of persistence levels?
Which statement best describes p-persistent CSMA in terms of persistence levels?
What distinguishes Non-persistent CSMA from 1-persistent CSMA?
What distinguishes Non-persistent CSMA from 1-persistent CSMA?
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