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MCQ

Who invented the modem?

Wang Laboratories Ltd.

AT & T Information Systems, USA

Apple Computers Inc.

Digital Equipment Corpn.

None of the above

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MCQ

Which of the following transmission systems provides the highest data rate to an individual device

Computer bus

Telephone lines

Voice band modem

leased lines

None of the above

Discussion

MCQ

The difference between a multiplexer and a statistical multiplexer is

Statistical multiplexers need buffers while multiplexers do not need buffers

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

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

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

None of the above

Discussion

MCQ

Which layer of international standard organization's OSI model is responsible for creating and recognizing frame boundaries?

physical layer

data link layer

transport layer

network layer

None of the above

Discussion

MCQ

What frequency range is used for TV transmission and low power microwave applications?

Very Low Frequency : 3 kHz to 30 kHz

Medium Frequency : 300 kHz to 3 MHz

Ultra High Frequency : 300 MHz to 3000 MHz

Super High Frequency : 3000 MHz to 30000 MHz

None of the above

Discussion

MCQ

Which of the following is an important characteristic of LAN?

application independent interfaces

unlimited expansion

low cost access for low bandwidth channels

parallel transmission

None of the above

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Engineering

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Medical

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History and Generations

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Output Devices

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Digital Logic Gate

Number System

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Disk Operating System (DOS)

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