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Q.

A machine that connects to two or more electronic mail systems and transfers mail messages among them is known as

A

Gateways

B

mail gateway

C

bridges

D

User Agent

E

None of the above

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MCQ

1.

Demodulation is a process of

A

converting analog to digital signals

B

converting digital to analog signals

C

multiplexing various signals into one high speed line signals

D

performing data description.

Discussion

MCQ

2.

The area of coverage of a satellite radio beam is known as

A

Footprint

B

Circular polarization

C

Beam width

D

Identity

E

None of the above

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3.

The _____ layer is the layer closest to the transmission medium.

A

transport

B

network

C

data link

D

physical

E

None of the above

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4.

What is the name of the computer based EMMS that provides a common forum where users can check in at their convenience, post messages, actively exchange ideas and participate in ongoing discussions?

A

E-mail

B

Bulletin board system (BBS)

C

Teleconferencing

D

Videoconferencing

E

None of the above

Discussion

MCQ

5.

Which of the following technique is used for allocating capacity on a satellite channel using fixed-assignment FDM?

A

Amplitude modulation

B

Frequency-division multiple access

C

Frequency modulation

D

Frequency-shift keying

E

None of the above

Discussion

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