Multiple Access Links Protocols MCQs

12 MCQs — Computer Networks MCQs (Page 1 of 2)

Practice Multiple Access Links Protocols MCQs with correct answers and explanations. These questions are from the Computer Networks MCQs section.

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Which of the following are the types of basic protocols that are present in multiple access control in data link layer?

A. Random, controlled, channelization
B. Controlled, channelization
C. Random, channelization
D. Random, controlled, contributed

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Which aspect of the random-access protocols makes them contention methods?

A. No rules for accessing medium
B. Shared bandwidth
C. Authorized access for medium
D. Scheduling time for medium

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Why station need to wait random amount of time for re-transmission of the frame after collision in pure aloha?

A. To prevent other stations
B. To avoid more collisions
C. To detect other collisions
D. To get acknowledgment from the receiver

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Which strategy is used by the pure aloha to prevent the congestion caused by continuous re-transmitted frames?

A. Aborts the re-transmission after 5 attempts
B. A station is allowed to re-transmit for 2 times
C. Restriction on the attempts for re-transmission
D. Re-transmission has no restriction

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What is the vulnerable time of the pure aloha for fixed length of frames (T=frame time)?

A. 2*t
B. 3*t
C. 1/2*t
D. 5*t

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Which of the following controlled access protocol is known as master slave method?

A. Polling
B. Reservation
C. Token passing
D. Scheduling

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Which of the following type of multiple access protocols uses a scheme called “Authorization from other stations”?

A. Random access protocol
B. Controlled access protocol
C. Channelization
D. Persistent method

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Which of the following persistent method of random-access protocol reduces the collisions and efficiency of the network?

A. 1 ? persistent
B. Non persistent
C. Persistent
D. 1 ? persistent and non-persistent

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What is the vulnerable time in carrier sense multiple access?

A. T propagation
B. T frame
C. 2*t frame
D. 2*t propagation

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Slotted aloha has vulnerable time that is half of the vulnerable time of pure aloha.

A. True
B. False
C.
D.

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