Data Communication and Networking MCQs

91.

If each character in an X MODEM block has an ASC II value of 50, what would be the value of the checksum added to the block?

   A.) 50
   B.) 23
   C.) 41
   D.) 25

Answer: Option 'D'

25

92.

The receive equalizer reduces delay distortions using a _______.

   A.) difference engine
   B.) tapped delay lines
   C.) descrambler
   D.) gear shift

Answer: Option 'B'

​tapped delay lines

93.

To connect a computer to a device in the same room, we might be likely to use a ________.

   A.) coaxial cable
   B.) dedicated line
   C.) ground station
   D.) all of these

Answer: Option 'A'

coaxial cable

94.

In the current frequency assignments, how many frequency bands are there for the uplink frequencies?

   A.) 16
   B.) 8
   C.) 4
   D.) 2

Answer: Option 'C'

4

95.

A group of packets from a source through an X.25 packet system to sink.

   A.) arrive in the same order sent for VC, but not for PVC
   B.) arrive in the same order sent for PVC, but not for VC
   C.) arrive in the same order sent for both VC and PVC
   D.) None of these

Answer: Option 'C'

arrive in the same order sent for both VC and PVC

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