Practice Exam Test Questions
Choose the letter of the best answer in each questions.
1. To handle frames arriving from other protocols, Frame Relay uses a device called a _________.
A) MUX
B) VOFR
C) FRAD
D) none of the above
Answer: Option C
Solution:
2. In Frame Relay, an address can be ________ bytes.
A) 2 to 3
B) 2 to 4
C) only f2
D) none of the above
Answer: Option B
Solution:
3. In ATM, the _____ layer defines the transmission medium, bit transmission, encoding, and electrical-to-optical transformation.
A) AAL
B) physical
C) ATM layer
D) none of the above
Answer: Option B
Solution:
4. A _______ ATM LAN combines features of a pure ATM LAN and a legacy ATM LAN.
A) legacy
B) pure
C) mixed architecture
D) none of the above
Answer: Option C
Solution:
5. A(n) ______ is the interface between a user and an ATM switch.
A) NNN
B) UNI
C) NNI
D) None of the above
Answer: Option B
Solution:
6. In ATM, a virtual connection is defined by _________.
A) DLCI
B) VPI
C) VCI
D) a combination of (b) and (c)
Answer: Option D
Solution:
7. In ATM, _______is for short packets.
A) AAL5
B) AAL3/4
C) AAL2
D) AAL1
Answer: Option C
Solution:
8. In Frame Relay, when a _____ is selected, the corresponding table entry is recorded for all switches by the administrator.
A) SVC
B) PVC
C) either (a) or (b)
D) neither (a) nor (b)
Answer: Option B
Solution:
9. In ATM, the _______layer accepts transmissions from upper-layer services and maps them into ATM cells.
A) AAL
B) physical
C) ATM
D) none of the above
Answer: Option A
Solution:
10. The VPI of a UNI is _______ bits in length.
A) 32
B) 16
C) 12
D) 8
Answer: Option D
Solution:
11. The ATM standard defines ______ layers.
A) five
B) four
C) three
D) two
Answer: Option C
Solution:
12. ________ technology can be adapted for use in a LAN (ATM LAN).
A) ATM
B) X.25
C) Frame Relay
D) none of the above
Answer: Option A
Solution:
13. VCIs in Frame Relay are called ______.
A) SVC
B) DLCIs
C) PVC
D) none of the above
Answer: Option B
Solution:
14. The AAL is divided into _______ sublayers.
A) four
B) three
C) two
D) none of the above
Answer: Option C
Solution:
15. _________ is the interface between two ATM switches.
A) NNI
B) NNN
C) UNI
D) none of the above
Answer: Option A
Solution:
16. Frame Relay networks offer an option called ______________ that sends voice through the network.
A) FRAD
B) VOFR
C) MUX
D) none of the above
Answer: Option B
Solution:
17. A _______ is defined as a small, fixed-size block of information.
A) packet
B) cell
C) frame
D) none of the above
Answer: Option B
Solution:
18. In ATM, the ______ layer provides routing, traffic management, switching, and multiplexing services.
A) ATM
B) AAL
C) physical
D) none of the above
Answer: Option A
Solution:
19. In ATM, _____ is for conventional packet switching (virtual-circuit approach or datagram approach).
A) AAL5
B) AAL3/4
C) AAL2
D) AAL1
Answer: Option B
Solution:
20. Frame Relay provides ________.
A) SVCs
B) PVCs
C) either (a) or (b)
D) neither (a) nor (b)
Answer: Option C
Solution:
21. In Frame Relay, the EA field defines the number of bytes; it is _____ in the last byte of the address.
A) 0
B) 1
C) 2
D) 3
Answer: Option B
Solution:
22. In a _____ ATM LAN, an ATM switch connects stations.
A) legacy
B) pure
C) mixed architecture
D) none of the above
Answer: Option B
Solution:
23. The VPI of an NNI is _______ bits in length.
A) 24
B) 16
C) 12
D) 8
Answer: Option C
Solution:
24. At the data link layer, Frame Relay uses a protocol that supports _____control.
A) error
B) flow
C) either (a) or (b)
D) neither (a) nor (b)
Answer: Option D
Solution:
25. ________ is the cell relay protocol designed by the corresponding Forum and adopted by the ITU-T.
A) Frame Relay
B) ATM
C) X.25
D) none of the above
Answer: Option B
Solution:
26. In Frame Relay, when ______ is selected, it requires establishing and terminating phases.
A) a PVC
B) an SVC
C) either (a) or (b)
D) neither (a) nor (b)
Answer: Option B
Solution:
27. In a _______ ATM LAN, the backbone that connects traditional LANs uses ATM technology.
A) legacy
B) pure
C) mixed architecture
D) none of the above
Answer: Option A
Solution:
28. In ATM, connection between two endpoints is accomplished through _______.
A) VCs
B) TPs
C) VPs
D) all of the above
Answer: Option D
Solution:
29. Frame Relay has _______.
A) the physical, data link, and network layers
B) the physical and data link layers
C) only the data link
D) only the physical layer
Answer: Option B
Solution:
30. In ATM, ______ is for packets requiring no sequencing and no error control mechanism.
A) AAL5
B) AAL3/4
C) AAL2
D) AAL1
Answer: Option A
Solution:
31. ______ eliminates the varying delay times associated with different-size packets.
A) Frame Relay
B) ATM
C) X.25
D) all of the above
Answer: Option B
Solution:
32. In ATM, ______ is for constant-bit-rate data.
A) AAL5
B) AAL3/4
C) AAL2
D) AAL1
Answer: Option D
Solution:
33. ________ is a virtual-circuit wide-area network that was designed in response to demands for a new type of WAN in the late 1980s and early 1990s.
A) ATM
B) Frame Relay
C) X.25
D) none of the above
Answer: Option B
Solution:
34. The ATM data packet is a cell composed of ______ bytes.
A) 53
B) 52
C) 43
D) 42
Answer: Option A
Solution:
Complete List of Chapter Quiz in Data Communications and Networking
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MCQ in Virtual-Circuit Networks - Frame Relay and ATM (pdf)
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