Transmission Media Questions

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31.

A ________ network is made of a set of switches connected by physical links, in which each link is divided into n channels.

A

line-switched

B

frame-switched

C

circuit-switched

D

none of the above

Correct Answer: C

None.

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32.

Circuit switching takes place at the ________ layer.

A

data line

B

physical

C

network

D

transport

Correct Answer: B

None.

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33.

In _______, the resources need to be reserved during the setup phase; the resources remain dedicated for the entire duration of data transfer phase until the teardown phase.

A

datagram switching

B

circuit switching

C

frame switching

D

none of the above

Correct Answer: B

None.

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34.

In _________, there is no resource allocation for a packet.

A

datagram switching

B

circuit switching

C

frame switching

D

none of the above

Correct Answer: A

None.

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35.

In _________, resources are allocated on demand.

A

datagram switching

B

circuit switching

C

frame switching

D

none of the above

Correct Answer: A

None.

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36.

In __________, each packet is treated independently of all others.

A

datagram switching

B

circuit switching

C

frame switching

D

none of the above

Correct Answer: A

None.

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37.

. In _______ there are no setup or teardown phases.

A

datagram switching

B

circuit switching

C

frame switching

D

none of the above

Correct Answer: A

None.

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38.

A _________ network is a cross between a circuit-switched network and a datagram network. It has some characteristics of both.

A

virtual-circuit

B

packet-switched

C

frame-switched

D

none of the above

Correct Answer: A

None.

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39.

We can say that a packet switch has _______ types of components

A

two

B

three

C

four

D

none of the above

Correct Answer: C

None.

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40.

The simplest type of switching fabric is the ______ switch

A

crosspoint

B

crossbar

C

TSI

D

STS

Correct Answer: B

None.

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