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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) |
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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) |
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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 |
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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) |
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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 |
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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 |
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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 |
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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 |
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27 | |
In ATM, ______ is for constant-bit-rate data. |
|
| | A) | AAL1 |
| | B) | AAL2 |
| | C) | AAL3/4 |
| | D) | AAL5 |
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28 | |
In ATM, _______is for short packets. |
|
| | A) | AAL1 |
| | B) | AAL2 |
| | C) | AAL3/4 |
| | D) | AAL5 |
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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 |
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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 |
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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 |
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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 |