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Q.

A type of channel used to connect a central processor and peripherals which uses multipling is known as

A

Modem

B

Network

C

Multiplexer

D

All of the above

E

None of the above

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1.

Most data communications involving telegraph lines use:

A

simplex lines

B

wideband channels

C

narrowband channels

D

dialed service

E

None of the above

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Which of the following is a wrong example of network layer?

A

Internet Protocol (IP) - ARPANET

B

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C

Source routing and domain naming-USENet

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A data communications system has:

A

4 components

B

5 components

C

6 components

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7 components

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4.

To avoid transmission errors, a check figure is calculated by the

A

transmitting computer

B

receiving computer

C

both A and B

D

Start and stop bit

E

None of the above

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What device includes an adapter that decodes data sent in radio signals?

A

Modem

B

Digital Translator

C

Router

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Switch

E

None of these

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