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MCQ

Q.

How much power (roughly) a light-emitting diode can couple into an optical fiber?

A

100 microwatts

B

440 microwatts

C

100 picowatts

D

10 milliwatts

E

None of the above

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Similar Questions

MCQ

1.

After coding a document into a digital signal, it can be sent by telephone, telex or satellite to the receiver where the signal is decoded and an exact copy of the original document is made. What is it called?

A

Telex

B

Word processor

C

Facsimile

D

Electronic mail

E

None of the above

Discussion

MCQ

2.

What is the first octet range for a class B IP address?

A

128 - 255

B

1 - 127

C

192 - 223

D

128 - 191

E

127 - 191

Discussion

MCQ

3.

What is the minimum number of wires required for sending data over a serial communications links?

A

2

B

1

C

4

D

3

E

None of the above

Discussion

MCQ

4.

What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard?

A

4

B

2

C

6

D

3

E

None of the above

Discussion

MCQ

5.

Which of the following communications modes support two-way traffic but in only one direction of a time?

A

simplex

B

half-duplex

C

three-quarters duplex

D

full-of the above

E

None of the above

Discussion

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