Data Communication and Networking – SONET and SDH MCQs

This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “SONET and SDH ”.
 

1
. SONET was developed by __________.
  • OSI
  • ITU-T
  • ANSI
  • none of the above
2
. SDH was developed by __________.
  • OSI
  • ITU-T
  • ANSI
  • none of the above
3
. SONET is a ___________ network.
  • synchronous
  • asynchronous
  • a or b
  • a and b
4
. SONET is designed for _________ transmission media.
  • twisted pair
  • coaxial
  • fiber optic
  • none of the above
5
. The hierarchical signalling levels in SONET are called______.
  • TSTs
  • STSs
  • TTSs
  • none of the above
6
. The hierarchical signalling levels in SDH are called______.
  • TSTs
  • STSs
  • STMs
  • none of the above
7
. The physical links defined to carry STSs are called______.
  • OSs
  • OCs
  • Cos
  • none of the above
8
. The lowest STS level has a data rate of _________ Mbps.
  • 155.520
  • 51.840
  • 1.454
  • none of the above
9
. The lowest STM level has a data rate of _________ Mbps.
  • 155.520
  • 51.840
  • 1.454
  • none of the above
10
. The highest STS level has a data rate of _________ Mbps.
  • 155.520
  • 51.840
  • 9953.28
  • none of the above
11
. The highest STM level has a data rate of _________ Mbps.
  • 155.520
  • 51.840
  • 9953.28
  • none of the above
12
. If three STS-1s are multiplexed, we get an _________.
  • STS-3
  • STS-2
  • STS-4
  • none of the above
13
. If two STS-1s are multiplexed, we get an _________.
  • STS-3
  • STS-2
  • STS-4
  • none of the above
14
. The path overhead can be added to a SONET frame only by a ________.
  • STS multiplexer
  • add/drop multiplexer
  • regenerator
  • none of the above
15
. The path overhead can be removed from a SONET frame only by a ________.
  • STS demultiplexer
  • add/drop multiplexer
  • regenerator
  • none of the above
16
. The line overhead can be added or removed from a SONET frame by a ________.
  • STS multiplexer
  • add/drop multiplexer
  • a and b
  • none of the above
17
. The section overhead can be added or removed from a SONET frame by a ________.
  • STS multiplexer
  • add/drop multiplexer
  • regenerator
  • All of the above
18
. An STS-1 frame has _______ rows.
  • 1
  • 3
  • 9
  • none of the above
19
. An STS-1 frame has _______ columns.
  • 9
  • 90
  • 900
  • none of the above
20
. The number of rows in STS-3 is _______ the number of rows in STS-1.
  • three times
  • two times
  • equal to
  • none of the above
21
. The number of columns in STS-3 is _______ the number of rows in STS-1.
  • three times
  • two times
  • equal to
  • none of the above
22
. An STS-1 frame contains _______ octets.
  • 90
  • 810
  • 80
  • none of the above
23
. An STS-1 frame contains _______ bits.
  • 6000
  • 6840
  • 6480
  • none of the above
24
. Section overhead in an STS-1 frame contains _______ octets.
  • 18
  • 9
  • 12
  • none of the above
25
. Line overhead in an STS-1 frame contains _______ octets.
  • 18
  • 9
  • 12
  • none of the above
26
. Path overhead in an STS-1 frame contains _______ octets.
  • 18
  • 9
  • 12
  • none of the above
27
. In STS-1, _______ frames are sent per second.
  • 4000
  • 6000
  • 8000
  • none of the above
28
. All VTs have _______ rows.
  • 12
  • 9
  • 6
  • none of the above
29
. A VTx has _______ columns.
  • x
  • 2x
  • 2
  • none of the above
30
. A VT1.5 has _______ columns.
  • 3
  • 2
  • 4
  • none of the above

 
 
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