Computer Networks MCQs

1018 MCQs  (Page 39 of 102)

Attempt Computer Networks Quiz
Simple parity-check is used to detect the even number of errors also.
A. True
B. False
C.
D.
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Which of the following is not an error detecting code?
A. Hamming code
B. Checksum
C. Parity check
D. Cyclic redundancy check
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How cyclic redundancy check code can also be called?
A. Fletcher’s checksum
B. Polynomial code
C. Generator polynomial code
D. Checksum
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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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Word of the Day
16 Jul
Volatile
(of a substance) easily evaporated at normal temperatures.
بدلتے مزاج والا، کافور صفت

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