Practice Quiz in Congestion Control and Quality of Service Part 4

(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 4 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 IV of the Online Practice Quiz

Quiz in Congestion Control and Quality of Service

Question 31. In Frame Relay, the ________ bit warns the sender of congestion in the network.

A. BECN

B. FECN

C. either (a) or (b)

D. neither (a) nor (b)


Question 32. In Frame Relay, a ___________ is the maximum number of bits in a predefined time that the network is committed to transfer without discarding any frame or setting the DE bit.

A. access rate

B. committed burst size

C. committed information rate

D. excess burst size


Question 33. In Frame Relay, the _____________ defines an average rate in bits per second.

A. access rate

B. committed burst size

C. committed information rate

D. excess burst size


Question 34. The technique of ________refers to a congestion control mechanism in which a congested node stops receiving data from the immediate upstream node or nodes.

A. backpressure

B. choke packet

C. implicit signaling

D. explicit signaling


Question 35. In ATM, the _________ class is divided into two subclasses: real-time (VBR-RT) and non-real-time (VBR-NRT). VBR-RT is designed for those users who need real-time services (such as voice and video transmission) and use compression techniques to create a variable bit rate. VBR-NRT is designed for those users who do not need real-time services but use compression techniques to create a variable bit rate.

A. CBR

B. VBR

C. ABR

D. UBR


Question 36. The ________ is a function of three values: average data rate, peak data rate, and maximum burst size.

A. peak data rate

B. maximum burst size

C. effective bandwidth

D. None of these


Question 37. _______ happens in any system that involves waiting.

A. Congestion

B. Jamming

C. Error

D. None of these


Question 38. In ________, queuing packets wait in a buffer (queue) until the node (router or switch) is ready to process them.

A. FIFO

B. priority

C. weighted fair

D. None of these


Question 39. In _________, when a source makes a reservation, it needs to define a flow specification.

A. Integrated Services

B. Differentiated Services

C. Connectionless

D. Connection-Oriented


Question 40. In the ___________ algorithm of TCP, the size of the threshold is dropped to one-half, a multiplicative decrease.

A. slow-start

B. congestion avoidance

C. congestion detection

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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