This is the MCQs in Virtual-Circuit Networks: Frame Relay and ATM from book the 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 before taking the Board Exam.
The topic discuss the two switched WANs: Frame Relay and ATM. Frame Relay 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. Asynchronous Transfer Mode (ATM) is a cell relay protocol that, in combination with SONET, allows high-speed connections. If you skip the summary and important terminology visit Virtual-Circuit Networks: Frame Relay and ATM .
Begin and Good luck!
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 _________.
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
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
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
5. A(n) ______ is the interface between a user and an ATM switch.
- A) NNN
- B) UNI
- C) NNI
- D) None of the above
6. In ATM, a virtual connection is defined by _________.
- A) DLCI
- B) VPI
- C) VCI
- D) a combination of (b) and (c)
7. In ATM, _______is for short packets.
- A) AAL5
- B) AAL3/4
- C) AAL2
- D) AAL1
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)
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
10. The VPI of a UNI is _______ bits in length.
- A) 32
- B) 16
- C) 12
- D) 8
11. The ATM standard defines ______ layers.
- A) five
- B) four
- C) three
- D) two
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
13. VCIs in Frame Relay are called ______.
- A) SVC
- B) DLCIs
- C) PVC
- D) none of the above
14. The AAL is divided into _______ sublayers.
- A) four
- B) three
- C) two
- D) none of the above
15. _________ is the interface between two ATM switches.
- A) NNI
- B) NNN
- C) UNI
- D) none of the above
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
17. A _______ is defined as a small, fixed-size block of information.
- A) packet
- B) cell
- C) frame
- D) none of the above
18. In ATM, the ______ layer provides routing, traffic management, switching, and multiplexing services.
- A) ATM
- B) AAL
- C) physical
- D) none of the above
19. In ATM, _____ is for conventional packet switching (virtual-circuit approach or datagram approach).
- A) AAL5
- B) AAL3/4
- C) AAL2
- D) AAL1
20. Frame Relay provides ________.
- A) SVCs
- B) PVCs
- C) either (a) or (b)
- D) neither (a) nor (b)
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
22. In a _____ ATM LAN, an ATM switch connects stations.
- A) legacy
- B) pure
- C) mixed architecture
- D) none of the above
23. The VPI of an NNI is _______ bits in length.
- A) 24
- B) 16
- C) 12
- D) 8
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)
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
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)
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
28. In ATM, connection between two endpoints is accomplished through _______.
- A) VCs
- B) TPs
- C) VPs
- D) all of the above
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
30. In ATM, ______ is for packets requiring no sequencing and no error control mechanism.
- A) AAL5
- B) AAL3/4
- C) AAL2
- D) AAL1
31. ______ eliminates the varying delay times associated with different-size packets.
- A) Frame Relay
- B) ATM
- C) X.25
- D) all of the above
32. In ATM, ______ is for constant-bit-rate data.
- A) AAL5
- B) AAL3/4
- C) AAL2
- D) AAL1
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
34. The ATM data packet is a cell composed of ______ bytes.
- A) 53
- B) 52
- C) 43
- D) 42
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