Data Communication and Networking Questions

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321.

Which of the following is an example of a client-server model?

A

TELNET

B

FTP

C

DNS

D

All of the above

E

None of the above

Correct Answer: D

None.

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322.

In CRC there is no error if the remainder at the receiver is _____.

A

the quotient at the sender

B

nonzero

C

zero

D

equal to the remainder at the sender

E

None of the above.

Correct Answer: A

None.

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323.

A WATS arrangement

A

is always less expensive than flat-rate service

B

is less expensive than flat-rate service only when the number of calls is large and the duration of each is short

C

is less expensive than flat-rate service only when the number of calls is small and the duration of each is long

D

is never less expensive than flat-rate service

E

None of the above

Correct Answer: B

None.

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324.

A T-switch is used to

A

control how messages are passed between computers

B

echo every character that is received

C

transmit characters one at a time

D

rearrange the connections between computing equipment

E

None of the above

Correct Answer: D

None.

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325.

A global network of millions of business, government, educational, and research networks; computer systems; database; and end users. Select the best fit for answer:

A

Internet works

B

The Internet

C

Internet revolution

D

Internet technologies

E

None of the above

Correct Answer: B

None.

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326.

Alice is setting up a small network in her home so that she can study for her MCSE exams. She doesn't have a lot of money to spend on hardware, so she wants to use a network topology that requires the least amount of hardware possible. Which topology should she select?

A

Star

B

Right

C

Token-Ring

D

Ethernet

E

Bus

Correct Answer: E

None.

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327.

The CCITT Recommendation X.25 specifies three layers of communications:

A

application, presentation and session

B

Session, transport and network

C

physical datalink and network

D

datalink, network and transport

E

None of the above

Correct Answer: C

None.

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328.

Which of the following technique is used for allocating capacity on a satellite channel using fixed-assignment FDM?

A

Amplitude modulation

B

Frequency-division multiple access

C

Frequency modulation

D

Frequency-shift keying

E

None of the above

Correct Answer: B

None.

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329.

The amount of uncertainty in a system of symbol is called

A

Bandwidth

B

Entropy

C

loss

D

Quantum

E

None of the above

Correct Answer: B

None.

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330.

Which of the following allows a simple email service and is responsible for moving messages from one mail server to another?

A

IMAP

B

DHCP

C

SMTP

D

FTP

E

POP3

Correct Answer: C

None.

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