Question 3557 – UGC NET CS 2016 Aug- paper-2
April 14, 2024NTA UGC NET Dec 2023 Paper-2
April 14, 2024NTA UGC NET Dec 2023 Paper-2
| Question 19 |
Which of the following are example of CSMA channel sensing methods?
(A) 1-persistent
(B) 2-persistent
(C) p-persistent
(D) o-persistent
Choose the correct answer from the options given below:
(A) 1-persistent
(B) 2-persistent
(C) p-persistent
(D) o-persistent
Choose the correct answer from the options given below:
| (A), (B) and (D) Only | |
| (A), (C) and (D) Only | |
| (B), (C) and (D) Only | |
| (A), (B) and (C) Only |
Question 19 Explanation:
A) 1-persistent:
A station with a frame to transmit immediately listens to the channel.
If the channel is idle, the station transmits immediately.
If the channel is busy, the station continues to listen until the channel becomes idle, and then transmits immediately.
(B) 2-persistent:
A station with a frame to transmit listens to the channel.
If the channel is idle, the station transmits with a probability of 2/3.
If the channel is busy, the station waits for a random amount of time and then repeats the process.
(C) p-persistent:
A station with a frame to transmit listens to the channel.
If the channel is idle, the station transmits with a probability of p (where 0 < p < 1).
If the channel is busy, the station waits for a fixed amount of time and then repeats the process.
A station with a frame to transmit immediately listens to the channel.
If the channel is idle, the station transmits immediately.
If the channel is busy, the station continues to listen until the channel becomes idle, and then transmits immediately.
(B) 2-persistent:
A station with a frame to transmit listens to the channel.
If the channel is idle, the station transmits with a probability of 2/3.
If the channel is busy, the station waits for a random amount of time and then repeats the process.
(C) p-persistent:
A station with a frame to transmit listens to the channel.
If the channel is idle, the station transmits with a probability of p (where 0 < p < 1).
If the channel is busy, the station waits for a fixed amount of time and then repeats the process.
Correct Answer: D
Question 19 Explanation:
A) 1-persistent:
A station with a frame to transmit immediately listens to the channel.
If the channel is idle, the station transmits immediately.
If the channel is busy, the station continues to listen until the channel becomes idle, and then transmits immediately.
(B) 2-persistent:
A station with a frame to transmit listens to the channel.
If the channel is idle, the station transmits with a probability of 2/3.
If the channel is busy, the station waits for a random amount of time and then repeats the process.
(C) p-persistent:
A station with a frame to transmit listens to the channel.
If the channel is idle, the station transmits with a probability of p (where 0 < p < 1).
If the channel is busy, the station waits for a fixed amount of time and then repeats the process.
A station with a frame to transmit immediately listens to the channel.
If the channel is idle, the station transmits immediately.
If the channel is busy, the station continues to listen until the channel becomes idle, and then transmits immediately.
(B) 2-persistent:
A station with a frame to transmit listens to the channel.
If the channel is idle, the station transmits with a probability of 2/3.
If the channel is busy, the station waits for a random amount of time and then repeats the process.
(C) p-persistent:
A station with a frame to transmit listens to the channel.
If the channel is idle, the station transmits with a probability of p (where 0 < p < 1).
If the channel is busy, the station waits for a fixed amount of time and then repeats the process.