Transmission Media Questions

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61.

The largest portion of the bandwidth for ADSL carries _______.

A

voice communication

B

upstream data

C

downstream data

D

control data

Correct Answer: C

None.

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62.

_______ was designed as an alternative to the T-1 line.

A

VDSL

B

ADSL

C

SDSL

D

HDSL

Correct Answer: D

None.

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63.

HDSL encodes data using _______.

A

4B/5B

B

2B1Q

C

1B2Q

D

6B/8T

Correct Answer: B

None.

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64.

Another name for the cable TV office is the _______.

A

splitter

B

fiber node

C

combiner

D

head end

Correct Answer: D

None.

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65.

. A traditional cable TV network transmits signals ______.

A

upstream

B

downstream

C

upstream and downstream

D

none of the above

Correct Answer: B

None.

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66.

In an HFC network, the downstream data are modulated using the _______ modulation technique.

A

PSK

B

QAM

C

PCM

D

ASK

Correct Answer: B

None.

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67.

In an HFC network, the upstream data are modulated using the _______ modulation technique

A

QAM

B

QPSK

C

PCM

D

ASK

Correct Answer: B

None.

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68.

The standard for data transmission over an HFC network is called _______

A

MCNS

B

DOCSIS

C

CMTS

D

ADSL

Correct Answer: B

None.

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69.

The original telephone network, which is referred to as the plain old telephone system (POTS), was an ________ system

A

digital

B

analog

C

digital as well as analog

D

none of the above

Correct Answer: B

None.

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70.

The modern telephone network is now ________

A

digital

B

analog

C

digital as well as analog

D

none of the above

Correct Answer: C

None.

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