Question # 1

A computer based system in which a telephone message is recorded in digital form and then forwarded to others is

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a teleconferencing

voice mail

a bulletin board

telecommuting

Graphics and other paperwork can be transmitted directly using which technology?

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CSMA/CD

token passing

facsimile

bulletin board

_________Coding schemes use 4 bit code

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Unicode

ASCII

EBCDIC

BCD

The device used with satellite transmission that ensures that strong outgoing signals do not interface with weak incoming signals is called a.

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microwave

transponder

cable

modem

Now-a-day computers all over the world can talk to each other. Which is one of the special accessories essential for this purpose?

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Fax card

Modem card

Network Adapter card

DVD

Logical security for on-line systems is achieved primarily by ________ and authorization codes

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MIS

Passwords

Tactical

None of the above

The music and speech represent the:

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Image Data

Audio Data

Video Data

Text Data

The height of the wave is called :

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Oscillation

Amplitude

Signal

Frequency

The type of modulation that changes the height of the signal is called.

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frequency

phase

amplitude

prephase

Which of the following topologies is passive?

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Star topology

Ring topology

Bus topology

Hybrid topology

The number of times a wave repeats during a specific time interval is called

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Amplitude

Oscillation

Frequency

Pulses

One or more computers connected to a hub computer is a(n)

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ring network

node

information utility

star network

The _____________ is the physical path over which the message travels :

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Protocol

Medium

Signal

All of the above

Electronic banking.

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token ring

Mosaic

EFT

BBS

The media Access Control sublayer resides in which OSI layer?

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Physical

Data Link

Network

Transport

Which of the following is not a category of network problems.

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Newsgroup problems

Physical problems

Electrical problems

Viruses

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ECAT Computer Science Chapter 6 Data Communication Online Test MCQs With Answers

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