Data Communication and Networking Questions

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181.

How many class A, B, and C network IDs can exist?

A

2113658

B

16382

C

126

D

128

E

None of the above

Correct Answer: A

None.

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182.

The transmission signal coding method of TI carrier is called

A

Bipolar

B

NRZ

C

Manchester

D

Binary

E

None of the above

Correct Answer: A

None.

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183.

Which of the following statement is correct?

A

Buffering is the process of temporarily storing the data to allow for small variation in device speeds

B

Buffering is a method to reduce cross-talks

C

Buffering is a method to reduce the routing overhead

D

Buffering is storage of data within the transmitting medium until the receiver is ready to receive

E

None of the above

Correct Answer: A

None.

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184.

You are working with a network that has the network ID 192.168.10.0 and require nine subsets for your company and the maximum number of hosts. What subnet mask should you use?

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: C

None.

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185.

Messages from one computer terminal can be sent to another by using data networks. The message to be sent is converted to an electronic digital signal, transmitted via a cable, telephone or satellite and then converted back again at the receiving end. What is this system of sending messages called?

A

Paperless office

B

Electronic mail

C

Global network

D

Electronic newspaper

E

None of the above

Correct Answer: B

None.

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186.

HDLC (High-level Data Link Control) is

A

a method of determining which device has access to the transmission medium at any time

B

a method access control technique for multiple-access transmission media

C

a very common bit-oriented data link protocol issued by ISO.

D

network access standard for connecting stations to a circuit-switched network

E

None of the above

Correct Answer: C

None.

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187.

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

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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188.

Establishing a virtual connection is functionally equivalent to

A

Connecting as virtual memory

B

Physically connecting a DTE and DCE

C

Placing a telephone call prior to a conversation

D

Placing a modem prior to a conversation

E

None of the above

Correct Answer: C

None.

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189.

The first step in troubleshooting many problems is to verify which of the following?

A

The subnet mask is valid

B

TCP/IP is installed correctly on the client

C

The WINS server is running

D

The BDC is operable

E

None of the above

Correct Answer: B

None.

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190.

You are working with a network that is 172.16.0.0 and would like to have the maximum number of hosts per subnet. This assumes support for eight subnets. What subnet mask should you use?

A

255.255.192.0

B

255.255.224.0

C

255.255.240.0

D

255.255.248.0

E

255.255.255.0

Correct Answer: C

None.

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