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