Question
Download Solution PDFWhich 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:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe 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.
Last updated on Jun 12, 2025
-> The UGC NET June 2025 exam will be conducted from 25th to 29th June 2025.
-> The UGC-NET exam takes place for 85 subjects, to determine the eligibility for 'Junior Research Fellowship’ and ‘Assistant Professor’ posts, as well as for PhD. admissions.
-> The exam is conducted bi-annually - in June and December cycles.
-> The exam comprises two papers - Paper I and Paper II. Paper I consists of 50 questions and Paper II consists of 100 questions.
-> The candidates who are preparing for the exam can check the UGC NET Previous Year Papers and UGC NET Test Series to boost their preparations.