Practice Quiz in Congestion Control and Quality of Service Part 3

(Last Updated On: December 21, 2017)

Practice Quiz in Congestion Control and Quality of Service

This is the Online Practice Quiz in Congestion Control and Quality of Service part 3 from the book, Data Communications and Networking 4th Edition by Behrouz A. Forouzan. If you are looking for a reviewer in Electronics Systems and Technologies (Communications Engineering) this will definitely help you test your knowledge and skill before taking the Board Exam.

Continue Part III of the Online Practice Quiz

Quiz in Congestion Control and Quality of Service

Question 21. In _________ queuing, the packets are assigned to different classes and admitted to different queues. The queues, however, are weighted based on the priority of the queues; higher priority means a higher weight. The system processes packets in each queue in a round-robin fashion with the number of packets selected from each queue based on the corresponding weight.

A. FIFO

B. priority

C. weighted fair

D. None of these


Question 22. In Frame Relay, the user can never exceed the_________.

A. access rate

B. committed burst size

C. committed information rate

D. excess burst size


Question 23. In the ______ bucket algorithm, bursty chunks are stored in the bucket and sent out at an average rate.

A. leaky

B. token

C. either (a) or (b)

D. neither (a) nor (b)


Question 24. In ATM, the _________ class delivers cells at a minimum rate. If more network capacity is available, this minimum rate can be exceeded.

A. CBR

B. CBR

C. ABR

D. UBR


Question 25. In Frame Relay, the ___________ is the maximum number of bits in excess of Bc that a user can send during a predefined time.

A. access rate

B. committed burst size

C. committed information rate

D. excess burst size


Question 26. In a network, when the load is below the capacity of the network, the throughput ______________.

A. increases sharply

B. increases proportionally with the load

C. declines sharply

D. declines proportionally with the load


Question 27. In ATM, the _________ class is designed for customers who need real-time audio or video services. The service is similar to that provided by a dedicated line such as a T line.

A. CBR

B. VBR

C. ABR

D. UBR


Question 28. In _________, we try to create an appropriate environment for the traffic.

A. congestion control

B. quality of service

C. either (a) or (b)

D. both (a) and (b)


Question 29. In _______ congestion control, mechanisms are used to alleviate congestion after it happens.

A. open-loop

B. closed-loop

C. either (a) or (b)

D. neither (a) nor (b)


Question 30. In the ________ traffic model, the rate of the data flow changes in time, with the changes smooth instead of sudden and sharp.

A. constant bit rate

B. variable bit rate

C. bursty

D. None of these

More Practice Quiz in Congestion Control and Quality of Service

Practice Quiz Part 1

Practice Quiz Part 2

Practice Quiz Part 3

Practice Quiz Part 4

Practice Quiz Part 5

Complete Practice Quiz in Data Communications and Networking

Note: After taking this particular quiz, you can proceed to check all the topics.


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