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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 |
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| 2 | Frame Relay provides ________. |
| A) | PVCs |
| B) | SVCs |
| C) | either (a) or (b) |
| D) | neither (a) nor (b) |
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| 3 | VCIs in Frame Relay are called ______. |
| A) | PVC |
| B) | SVC |
| C) | DLCIs |
| D) | none of the above |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 13 | A _______ is defined as a small, fixed-size block of information. |
| A) | frame |
| B) | packet |
| C) | cell |
| D) | none of the above |
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| 14 | In ATM, a virtual connection is defined by _________. |
| A) | VPI |
| B) | VCI |
| C) | DLCI |
| D) | a combination of (a) and (b) |
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| 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 |
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| 17 | The VPI of an NNI is _______ bits in length. |
| A) | 8 |
| B) | 12 |
| C) | 16 |
| D) | 24 |
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| 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 |
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| 20 | A(n) ______ is the interface between a user and an ATM switch. |
| A) | UNI |
| B) | NNI |
| C) | NNN |
| D) | None of the above |
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| 21 | _________ is the interface between two ATM switches. |
| A) | UNI |
| B) | NNI |
| C) | NNN |
| D) | none of the above |
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| 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 |
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| 24 | In ATM, the ______ layer provides routing, traffic management, switching, and multiplexing services. |
| A) | physical |
| B) | ATM |
| C) | AAL |
| D) | none of the above |
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| 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 |
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| 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 |
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| 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 |
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| 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 |