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MCQ

Q.

The core diameter of a single-mode fibers is about

A

10 times the wavelength of the light carried in the fiber

B

10 times the fiber radius

C

7 times the light carried in the fiber

D

3 times the wavelength of the light carried in the fiber

E

None of the above

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MCQ

1.

If digital data rate of 9600 bps is encoded using 8-level phase shift keying (PSK) method, the modulation rate is

A

1200 bands

B

3200 bands

C

4800 bands

D

9600 bands

E

None of the above

Discussion

MCQ

2.

What is the default subnet mask for a class A network?

A

127.0.0.1

B

255.0.0.0

C

255.255.255.0.0

D

255.255.255.0

E

None of the above

Discussion

MCQ

3.

The transmission signal coding method of TI carrier is called

A

Bipolar

B

NRZ

C

Manchester

D

Binary

E

None of the above

Discussion

MCQ

4.

The loss in signal power as light travels down the fiber is called

A

attenuation

B

propagation

C

scattering

D

interruption

E

None of the above

Discussion

MCQ

5.

The difference between a multiplexer and a statistical multiplexer is

A

Statistical multiplexers need buffers while multiplexers do not need buffers

B

Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol

C

Multiplexers often waste the output link capacity while statistical multiplexers optimize its use

D

Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division Multiplexing (FDM)

E

None of the above

Discussion

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