Computer Networks MCQ - Computer Networks Section 2

41 Slotted ALOHA

A
divide time into discrete intervals
B
require global time synchronization
C
both (a) and (b)
D
none of these

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Correct AnswerOption C

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42 Start and stop bits are used in serial communication for

A
error detection
B
error correction
C
synchronization
D
slowing down the communication

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Correct AnswerOption C

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43 In the carrier sense network, if prevailing condition is a 'channel busy', then technique used is

A
non-persistent then it results in randomised wait and sense
B
1-persistent then the channel is continually sensed
C
p-persistent then randomised retransmission is done
D
both (a) and (b)

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Correct AnswerOption B

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44 The systems that can be used in both priority and non-priority modes is

A
TDM
B
Register insertion
C
Carrier sense systems
D
all of these

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Correct AnswerOption C

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45 Number of cross point needed for 10 lines in a cross point switch which is full duplex in nature and there are no self-connection is

A
100
B
45
C
8
D
28

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Correct AnswerOption B

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As all lines are full-duplex and there are no self-connections, only the cross points above the diagonal are needed. Hence formula for the number of cross points needed is n (n -1) / 2

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