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

Question # 1

How many pairs of computers can simultaneously communicate on Ethernet LAN?

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multiple

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Question # 2

Project 802 defines standards for which layers of the OSI model?

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Application and Presentation layers

Physical an Date Link layers

Transport and Network layers

Network and Data Link layers

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Question # 3

Light sound and radio waves are examples of :

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Analog Signals

Digital Signals

Simple Signals

None

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Question # 4

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

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Question # 5

Centralized processing but with access from terminals is known as.

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DDP

a ring network

telecommuting

a teleprocessing system

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Question # 6

Communication between a computer and a keyboard involves

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Simplex

half-duplex

Full-duplex

automatic

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Question # 7

Which of the following topologies is passive?

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Star topology

Ring topology

Bus topology

Hybrid topology

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Question # 8

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

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frequency

phase

amplitude

prephase

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Question # 9

Which of the following does not provide a graphical user interface.

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OS/2

MS-DOS

Macintosh

Windows NT Workstation

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Question # 10

Microwave transmission, coaxial cables, and fiber optics are examples of.

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modems

communication links

gateways

ring network

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Question # 11

Cabling on a linear bus topology can be extended using which of the following?

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Terminator

Barrel connector

Network adapter card

Medium attachment unit

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