Data Communication and Networking Questions

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121.

HOSTS file entries are limited to how many characters?

A

8

B

255

C

500

D

Unlimited

E

None of the above

Correct Answer: B

None.

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122.

Demodulation is the process of

A

converting digital signals to analog signals

B

converting analog signals to digital signals

C

combining many low speed channels into one high speed channel

D

dividing the high-speed signals into frequency bands

E

None of the above

Correct Answer: B

None.

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123.

Which of the following statement is incorrect?

A

The Addresses Resolution Protocol, ARP, allows a host to find the physical address of a target host on the same physical network, given only the target IP address.

B

The sender's IP - to- physical address binding is included in every ARP broadcast

C

receivers update the IP-to-Physical address binding information in their cache before processing an ARP packet.

D

ARP is a low-level protocol that hides the underlying network physical addressing, permitting us to assign IP-addresses of our choice to every machine.

E

All of the above

Correct Answer: D

None.

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124.

You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports up to 25 hosts and a maximum number of subnets?

A

255.255.255.192

B

255.255.255.224

C

255.255.255.240

D

255.255.255.248

E

255.255.255.252

Correct Answer: B

None.

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125.

Which of the following best illustrates the default subnet mask for a class A,B, and C Network?

A

0.0.0.0, 0.0.0.1, 0.0.1.1

B

255.255.255.0, 255.255.0.0, 255.0.0.0

C

255.0.0.0, 255.255.0.0, 255.255.255.0

D

255.255.0.0, 255.255.255.0, 255.255.255.255

E

None of the above

Correct Answer: C

None.

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126.

Modulation is the process of

A

converting analog signals to digital signals

B

converting digital signals to analog signals

C

Multiplexing various signals into high speed line signals

D

performing data encryption.

Correct Answer: B

None.

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127.

Devices interconnected by the LAN should include

A

Computers and terminals

B

mass storage device, printers and plotters

C

bridges and gateways

D

All of the above

E

None of the above

Correct Answer: D

None.

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128.

What are the data transmission channels available for carrying data from one location to another?

A

Narrowband

B

Voiceband

C

Broadband

D

All of the above

E

None of the above

Correct Answer: D

None.

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129.

On a class B network, how many hosts are available at each site with a subnet mask of 248?

A

16382

B

8190

C

4094

D

2046

E

1022

Correct Answer: D

None.

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130.

Which of the following technique is used for encapsulation?

A

a technique used in best-effort delivery systems to avoid endlessly looping packets.

B

a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and places it in the data portion of the low level frame.

C

One of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission across a network that cannot handle the original datagram size

D

All of the above

E

None of the above

Correct Answer: B

None.

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