Data Communication and Networking Questions

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261.

A batch processing terminal would not include a

A

CPU

B

card reader

C

card punch

D

line printer

E

None of the above

Correct Answer: A

None.

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262.

Packet Switch Stream (PSS) was introduced in

A

the US in 1961 (&) the UK in 1981

B

the UK in 1980

C

the US in 1961

D

None of the above

E

None of the above

Correct Answer: B

None.

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263.

The physical layer of a network

A

defines the electrical characteristics of signals passed between the computer and communication devices

B

controls error detection and correction

C

constructs packets of data and sends them across the network

D

All of the above

E

None of the above

Correct Answer: A

None.

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264.

Which of the following allows devices on one network to communicate with devices on another network?

A

multiplexer

B

gateway

C

t-switch

D

modern

E

None of the above

Correct Answer: B

None.

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265.

An error detecting code is which code is the remainder resulting from dividing the bits to be checked by a predetermined binary number, is known as

A

Cyclic redundancy check

B

Checksum

C

Error detecting code

D

Error rate

E

None of the above

Correct Answer: A

None.

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266.

Bulletin board system

A

is a public access message system

B

is a modem capable of accepting commands

C

converts analog signals to digital signals

D

converts digital signals to analog signals

E

None of the above

Correct Answer: A

None.

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267.

In OSI model, which of the following layer provides error-free delivery of data?

A

Data link

B

Network

C

transport

D

Session

E

None of the above

Correct Answer: C

None.

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268.

Error detection at the data link level is achieved by?

A

Bit stuffing

B

Hamming codes

C

Cyclic Redundancy codes

D

Equalization

E

None of the above

Correct Answer: C

None.

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269.

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

Correct Answer: A

None.

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270.

Which of the following data transmission media has the largest terrestrial range without the use of repeaters or other devices?

A

Hardwiring

B

Microwave

C

Satellite

D

Laser

E

None of the above

Correct Answer: C

None.

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