ESAT Forouzan - Chapter 18: Virtual Circuit Switching (Frame Relay and ATM))

Question 1

Frame Relay operates in the _______.
a. Physical layer
b. Data link layer
c. Physical and data link layers
d. Physical, data link, and network layers

Answer 1

c. Physical and data link layers

Question 2

In the data link layer, Frame Relay uses _____________.
a. BSC protocol
b. A simplified HDLC protocol
c. LAPB
d. Any ANSI standard protocol

Answer 2

b. A simplified HDLC protocol

Question 3

Routing and switching in Frame Relay are performed by the _______ layer.
a. Physical
b. Data link
c. Network
d. (b) and (c)

Answer 3

b. Data link

Question 4

Frame Relay is unsuitable for ________ due to possible delays in transmission resulting from variable frame sizes.
a. Real-time video
b. File transfers
c. Fixed-rate data communication
d. All the above

Answer 4

a. Real-time video

Question 5

Frame relay provides _____ connections.
a. PVC
b. SVC
c. (a) and (b)
d. None of the above

Answer 5

c. (a) and (b)

Question 6

The Frame Relay address field is _______ in length.
a. 4 bytes
b. 2 bytes
c. 3 bytes
d. Any of the above

Answer 6

d. Any of the above

Question 7

A device called a(n) _______ allows frames from an ATM network to be transmitted across a Frame Relay network.
a. LMI
b. VOFR
c. FRAD
d. DLCI

Answer 7

c. FRAD

Question 8

_______ is a protocol to control and manage interfaces in Frame Relay networks.
a. LMI
b. VOFR
c. FRAD
d. DLCI

Answer 8

a. LMI

Question 9

_______ is a Frame Relay option that transmits voice through the network.
a. LMI
b. VOFR
c. FRAD
d. DLCI

Answer 9

b. VOFR

Question 10

In data communications, ATM is an acronym for _______.
a. Automated Teller Machine
b. Automatic Transmission Model
c. Asynchronous Telecommunication Method
d. Asynchronous Transfer Mode

Answer 10

d. Asynchronous Transfer Mode

Question 11

Because ATM _______, which means that cells follow the same path, the cells do not usually arrive out of order.
a. Is asynchronous
b. Is multiplexed
c. Is a network
d. Uses virtual circuit routing

Answer 11

d. Uses virtual circuit routing

Question 12

Which layer in ATM protocol reformats the data received from other networks?
a. Physical
b. ATM
c. Application adaptation
d. Data adaptation

Answer 12

c. Application adaptation

Question 13

Which layer in ATM protocol has a 53-byte cell as an end product?
a. Physical
b. ATM
c. Application adaptation
d. Cell transformation

Answer 13

b. ATM

Question 14

Which AAL type is designed to support a data stream that has a constant bit rate?
a. AAL1
b. AAL2
c. AAL3/4
d. AAL5

Answer 14

a. AAL1

Question 15

Which AAL type is designed to support SEAL?
a. AAL1
b. AAL2
c. AAL3/4
d. AAL5

Answer 15

d. AAL5

Question 16

In an ATM network, all cells belonging to a single message follow the same _______ and remain in their original order until they reach their destination.
a. Transmission path
b. Virtual path
c. Virtual circuit
d. None of the above

Answer 16

c. Virtual circuit

Question 17

A _______ provides a connection or a set of connections between switches.
a. Transmission path
b. Virtual path
c. Virtual circuit
d. None of the above

Answer 17

c. Virtual circuit

Question 18

A _________ is the physical connection between an endpoint and a switch or between two switches.
a. Transmission path
b. Virtual path
c. Virtual circuit
d. None of the above

Answer 18

a. Transmission path

Question 19

The VPI of a UNI is _________ bits in length.
a. 8
b. 12
c. 16
d. 24

Answer 19

a. 8

Question 20

The VPI of an NNI is _________ bits in length.
a. 8
b. 12
c. 16
d. 24

Answer 20

b. 12