Which of the following are example of CSMA channel sensing methods?

(A) 1-persistent

(B) 2-persistent

(C) p-persistent

(D) 0-persistent

Choose the correct answer from the options given below:

Question

Question

This question was previously asked in

UGC NET Computer Science (Paper 2) 07 Dec 2023 Official Paper

Answer 1

The correct answer is (A), (C) and (D) Only

EXPLANATION:

The CSMA (Carrier Sense Multiple Access) channel sensing methods are:

1-persistent CSMA: The station continuously senses the carrier, and if the channel is idle, it sends the frame immediately with a probability of 1 (i.e., persistence value of 1). If the channel is busy, the station waits until it becomes idle.
p-persistent CSMA: The station senses the channel, and if it is idle, it sends the frame with a probability p (0 < p ≤ 1). If the channel is busy or the frame is not sent, it waits for a certain period and tries again.
0-persistent CSMA: The station senses the channel, and if it is idle, it sends the frame immediately with a probability of 0. This means it does not persistently check the channel if busy but waits a random period before retrying.

Therefore, the correct answer is (A), (C), and (D) Only.