Data Questions

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261.

In SONET, for each byte, the bits are transmitted ____________

A

from least significant to the most significant

B

from most significant to the least significant

C

two at a time

D

three at a time

Correct Answer: B

None.

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262.

Each ________in a SONET frame can carry a digitized voice channel

A

bit

B

byte

C

frame

D

none of the above

Correct Answer: B

None.

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263.

The section overhead consists of ______octets

A

1

B

6

C

9

D

18

Correct Answer: C

None.

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264.

Line overhead consists of ________ bytes

A

1

B

6

C

9

D

18

Correct Answer: D

None.

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265.

The path overhead consists of ______ bytes

A

1

B

6

C

9

D

18

Correct Answer: C

None.

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266.

In ________ APS, there are normally two lines: one working line and one protection line. Both lines are active all the time

A

one-plus-one

B

one-to-one

C

one-to-many

D

none of the above

Correct Answer: A

None.

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267.

In ______ APS, there is one working line and one protection line. The data are normally sent on the working line until it fails.

A

one-plus-one

B

one-to-one

C

one-to-many

D

none of the above

Correct Answer: B

None.

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268.

In ________APS, there is only one protection line for many working lines. When a failure occurs in one of the working lines, the protection line takes control until the failed line is repaired

A

one-plus-one

B

one-to-one

C

one-to-many

D

none of the above

Correct Answer: C

None.

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269.

________ 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

Correct Answer: B

None.

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270.

Frame Relay provides ________

A

PVCs

B

SVCs

C

either (a) or (b)

D

neither (a) nor (b)

Correct Answer: C

None.

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