1. ________ 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) X.25
B) Frame Relay
C) ATM
D) none of the above
2. Frame Relay provides ________.
A) PVCs
B) SVCs
C) either (a) or (b)
D) neither (a) nor (b)
3. VCIs in Frame Relay are called ______.
A) PVC
B) SVC
C) DLCIs
D) none of the above
4. In Frame Relay, when a _____ is selected, the corresponding table entry is recorded for all switches by the administrator
A) PVC
B) SVC
C) either (a) or (b)
D) neither (a) nor (b)
5. 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)
6. Frame Relay has _______.
A) only the physical layer
B) only the data link
C) the physical and data link layers
D) the physical, data link, and network layers
7. At the data link layer, Frame Relay uses a protocol that supports _____control.
A) flow
B) error
C) either (a) or (b)
D) neither (a) nor (b)
8. In Frame Relay, an address can be ________ bytes.
A) only 2
B) 2 to 3
C) 2 to 4
D) none of the above
9. 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
10. To handle frames arriving from other protocols, Frame Relay uses a device called a _________.
A) VOFR
B) FRAD
C) MUX
D) none of the above
11. Frame Relay networks offer an option called ______________ that sends voice through the network.
A) VOFR
B) FRAD
C) MUX
D) none of the above
12. ________ is the cell relay protocol designed by the corresponding Forum and adopted by the ITU-T.
A) X.25
B) Frame Relay
C) ATM
D) none of the above
13. A _______ is defined as a small, fixed-size block of information.
A) frame
B) packet
C) cell
D) none of the above
14. In ATM, a virtual connection is defined by _________.
A) VPI
B) VCI
C) DLCI
D) a combination of (a) and (b)
15. The ATM standard defines ______ layers.
A) two
B) three
C) four
D) five
16. The VPI of a UNI is _______ bits in length.
A) 8
B) 12
C) 16
D) 24
17. The VPI of an NNI is _______ bits in length.
A) 8
B) 12
C) 16
D) 24
18. The ATM data packet is a cell composed of ______ bytes.
A) 40
B) 50
C) 52
D) 53
19. ______ eliminates the varying delay times associated with different-size packets.
A) X.25
B) Frame Relay
C) ATM
D) all of the above
20. A(n) ______ is the interface between a user and an ATM switch.
A) UNI
B) NNI
C) NNN
D) None of the above
21. _________ is the interface between two ATM switches.
A) UNI
B) NNI
C) NNN
D) none of the above
22. In ATM, connection between two endpoints is accomplished through _______.
A) TPs
B) VPs
C) VCs
D) all of the above
23. In ATM, the _______layer accepts transmissions from upper-layer services and maps them into ATM cells.
A) physical
B) ATM
C) AAL
D) none of the above
24. In ATM, the ______ layer provides routing, traffic management, switching, and multiplexing services.
A) physical
B) ATM
C) AAL
D) none of the above
25. In ATM, the _____ layer defines the transmission medium, bit transmission, encoding, and electrical-to-optical transformation.
A) physical
B) ATM layer
C) AAL
D) none of the above
26. The AAL is divided into _______ sublayers.
A) two
B) three
C) four
D) none of the above
27. In ATM, ______ is for constant-bit-rate data.
A) AAL1
B) AAL2
C) AAL3/4
D) AAL5
28. In ATM, _______is for short packets.
A) AAL1
B) AAL2
C) AAL3/4
D) AAL5
29. In ATM, _____ is for conventional packet switching (virtual-circuit approach or datagram approach).
A) AAL1
B) AAL2
C) AAL3/4
D) AAL5
30. In ATM, ______ is for packets requiring no sequencing and no error control mechanism.
A) AAL1
B) AAL2
C) AAL3/4
D) AAL5
31. ________ technology can be adapted for use in a LAN (ATM LAN).
A) X.25
B) Frame Relay
C) ATM
D) none of the above
32. In a _____ ATM LAN, an ATM switch connects stations.
A) pure
B) legacy
C) mixed architecture
D) none of the above
33. In a _______ ATM LAN, the backbone that connects traditional LANs uses ATM technology.
A) pure
B) legacy
C) mixed architecture
D) none of the above
34. A _______ ATM LAN combines features of a pure ATM LAN and a legacy ATM LAN.
A) pure
B) legacy
C) mixed architecture
D) none of the above
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