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Q.

Working of the WAN generally involves

A

telephone lines

B

microwaves

C

satellites

D

All of the above

E

None of the above

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1.

Number of Unguided Media is:

A

6

B

5

C

4

D

3

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2.

Which of the following performs modulation and demodulation?

A

fiber optic

B

satellite

C

coaxial cable

D

modem

E

None of the above

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3.

Messages from one computer terminal can be sent to another by using data networks. The message to be sent is converted to an electronic digital signal, transmitted via a cable, telephone or satellite and then converted back again at the receiving end. What is this system of sending messages called?

A

Paperless office

B

Electronic mail

C

Global network

D

Electronic newspaper

E

None of the above

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4.

A noiseless 3 KHz Channel transmits bits with binary level signals. What is the maximum data rate?

A

3 Kbps

B

6 Kbps

C

12 Kbps

D

24 Kbps.

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5.

Which of the following summation operation is performed on the bits to check an error-detecting code?

A

Codec

B

Coder-decoder

C

Checksum

D

Attenuation

E

None of the above

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