Data Communication and Networking Questions

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231.

Which of the following statements is incorrect?

A

Multiplexers are designed to accept data from several I/O devices and transmit a unified stream of data on one communication line.

B

HDLC is a standard synchronous communication protocol.

C

RTS/CTS is the way the DTE indicates that it is ready to transmit data and the way the DCE indicates that it is ready to accept data.

D

RTS/CTS is the way the terminal indicates ringing

E

None of the above

Correct Answer: D

None.

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232.

If communication software can be called the "traffic cop" of a micro communication system, then what should the modem be called?

A

Park

B

Bridge

C

Interface

D

Link

E

None of the above

Correct Answer: B

None.

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233.

Which of the following specifies the network address and host address of the computer?

A

The IP address

B

The TCP address

C

The subnet mask

D

The default gateway

E

None of the above

Correct Answer: A

None.

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234.

For connecting modem, a computer must be equipped with a port that conforms to the RS-232 standard of the Electronic Industries Association of America. What do the letters 'RS' stand for?

A

Recognised standard

B

Random sequence

C

Recommended standard

D

Registered source

E

None of the above

Correct Answer: C

None.

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235.

A network that requires human intervention of route signals is called a

A

bus network

B

ring network

C

star network

D

T-switched network

E

None of the above

Correct Answer: D

None.

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236.

What is the port number for POP3?

A

110

B

90

C

80

D

49

Correct Answer: A

None.

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237.

Which of the following provides a storage mechanism for incoming mail but does not allow a user to download messages selectively?

A

SMTP

B

DHCP

C

IMAP

D

POP3

E

2

Correct Answer: D

None.

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238.

On a class C network with a subnet mask of 192, how many subnets are available?

A

254

B

62

C

30

D

14

E

2

Correct Answer: E

None.

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239.

Ethernet and Token-Ring are the two most commonly used network architectures in the world. Jim has heard of the different topologies for networks and wants to choose the architecture that will provide him with the most options. Which of the following would that be? Choose the most correct answer.

A

Token-Ring because it currently can run at both 4Mbps and 16Mbps. This means that it can be used in any topology

B

Ethernet, because it is cabled using fiber-optic cable

C

Token-Ring, because it uses a MAU

D

Ethernet, because it can be set up with most topologies and can use multiple transfer speeds

E

Neither Token-Ring nor Ethernet is the proper choice. Only ARCnet can be used in all topologies

Correct Answer: D

None.

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240.

A 4 KHz noiseless channel with one sample every 125 per sec, is used to transmit digital signals. Find the bit rate (bits per second) that are sent, if CCITT 2.048 Mbps encoding is used.

A

500 Kbps

B

32 Kbps

C

8 Kbps

D

64 Kbps

E

None of the above

Correct Answer: D

None.

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