Most Recently Asked UBR Multiple Choice Questions And Answers

41. In ATM, the _________ class is a best-effort delivery service that does not guarantee anything.
A) CBR
B) VBR
C) ABR
D) UBR
Ans: D

42. Which AAL type is designed to support a data stream that has a constant bit rate?

A) AAL1
B) AAL2
C) AAL3/4
D) AAL5
Ans: A

43.  The _______ bit rate service class is similar to the service provided by a T-line.
 A. constant
 B. variable
 C. available
 D. unspecified
Ans: A

44.  The variable bit rate service class uses _______ techniques to create a variable bit rate.
 A. encapsulation
 B. encryption
 C. switching
 D. compression
Ans: D

45. The _______ bit rate service class delivers cells at a minimum rate that can be exceeded when the network is not running at full capacity.
 A. constant
 B. variable
 C. available
 D. unspecified
Ans: C

46. The _______ bit rate service class is a best-effort delivery service with no guarantees.
 A. constant
 B. variable
 C. available
 D. unspecified
Ans: D

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