Data Communication and Networking Questions

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461.

Which of the following communications modes support two-way traffic but in only one direction of a time?

A

simplex

B

half-duplex

C

three-quarters duplex

D

full-of the above

E

None of the above

Correct Answer: B

None.

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462.

Which of the following TCP/IP internet protocol a diskless machine uses to obtain its IP address from a server?

A

RDP

B

RARP

C

RIP

D

X.25

E

None of the above

Correct Answer: B

None.

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463.

In OSI network architecture, the dialogue control and token management are responsibilities of

A

session layer

B

network layer

C

transport layer

D

data link layer

E

None of the above

Correct Answer: A

None.

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464.

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

A

Computer bus

B

Telephone lines

C

Voice band modem

D

leased lines

E

None of the above

Correct Answer: A

None.

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465.

Which of the following connectivity devices is used to extend a network on a purely mechanical basis?

A

Gateway

B

Switch

C

Router

D

Active hub

E

802.6

Correct Answer: D

None.

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466.

The IEEE 802 project of the 1980s involved further defining the lower two layers of the OSI model. A number of standards were agreed upon during that time. Which of the following is the standard for Ethernet?

A

802.2

B

802.3

C

802.4

D

802.5

E

802.6

Correct Answer: B

None.

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467.

Which of the following digits are known as the terminal number of the Network User Address (NUA)?

A

05-Jul

B

01-Apr

C

08-Dec

D

13-14

E

None of the above

Correct Answer: C

None.

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468.

Which of the following device is used with an X.25 network to provide service to asynchronous terminals

A

repeater

B

bridges

C

gateway

D

Packet assembler/disassemble

E

None of the above

Correct Answer: D

None.

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469.

A medium access control technique for multiple access transmission media is

A

Aloha

B

Amplitude

C

Angle modulation

D

Attenuation

E

None of the above

Correct Answer: A

None.

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470.

The core diameter of a single-mode fibers is about

A

10 times the wavelength of the light carried in the fiber

B

10 times the fiber radius

C

7 times the light carried in the fiber

D

3 times the wavelength of the light carried in the fiber

E

None of the above

Correct Answer: A

None.

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