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Which of the following is the multiple access protocol for channel access control?

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Which of the following is the multiple access protocol for channel access control?

(a) CSMA/CD

(b) CSMA/CA

(c) Both CSMA/CD & CSMA/CA

(d) HDLC

I had been asked this question in an online interview.

I want to ask this question from Data Link Layer topic in chapter OSI Model of Computer Network

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The correct answer is (c) Both CSMA/CD & CSMA/CA

For explanation: In CSMA/CD, it deals with detection of collision after collision has occurred, whereas CSMA/CA deals with preventing collision. CSMA/CD is abbreviation for Carrier Sensing Multiple Access/Collision detection. CSMA/CA is abbreviation for Carrier Sensing Multiple Access/Collision Avoidance. These protocols are used for efficient multiple channel access.

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