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Q.

Which of the following network access standard is used for connecting stations to a circuit-switched network?

A

X.3

B

X.21

C

X.25

D

X.75

E

None of the above

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The number of bits transmitted per unit time.

B

The number of bytes transmitted per unit time.

C

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D

None of the above

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Which of the following medium access control technique is used for bus/tree?

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B

token bus

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CSMA

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MAC

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None of the above

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Error detection at a data link level is achieved by

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bit stuffing

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cyclic redundancy codes

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Hamming codes

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equalization

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uploading

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None of the above

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If digital data rate of 9600 bps is encoded using 8-level phase shift keying (PSK) method, the modulation rate is

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9600 bands

E

None of the above

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