Automatic repeat request error management mechanism

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5. Automatic repeat request error management mechanism is provided by a) logical link control sublayerb) media access control sublayerc) network interface control sublayerd) none of the mentionedView AnswerAnswer: aExplanation: The logical link control is a sublayer of data link layer whose main function is to manage traffic, flow and error control. This layer also acts as an interface between MAC layer and network layer.
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6. When 2 or more bits in a data unit has been changed during the transmission, the error is called 7. CRC stands for 8. Which one of the following is a data link protocol? 9. Which one of the following is the multiple access protocol for channel access control? a) CSMA/CDb) CSMA/CAc) Both CSMA/CD & CSMA/CAd) None of the mentionedView AnswerAnswer: cExplanation: 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
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Access/Collision detection. CSMA/CA is abbreviation for Carrier Sensing Multiple Access/Collision Avoidance. 10. The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called Computer Networks Questions & Answers – Network Layer This set of Computer Networks Multiple Choice Questions & Answers (MCQs) focuses on “Network Layer”.
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