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
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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