This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “SONET and SDH ”.
PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE
1. SONET was developed by __________.
- OSI
- ITU-T
- ANSI
- none of the above
C. ANSI
2. SDH was developed by __________.
- OSI
- ITU-T
- ANSI
- none of the above
B. ITU-T
3. SONET is a ___________ network.
- synchronous
- asynchronous
- a or b
- a and b
A. synchronous
4. SONET is designed for _________ transmission media.
- twisted pair
- coaxial
- fiber optic
- none of the above
C. fiber optic
5. The hierarchical signalling levels in SONET are called______.
- TSTs
- STSs
- TTSs
- none of the above
B. STSs
6. The hierarchical signalling levels in SDH are called______.
- TSTs
- STSs
- STMs
- none of the above
C. STMs
7. The physical links defined to carry STSs are called______.
- OSs
- OCs
- Cos
- none of the above
B. OCs
8. The lowest STS level has a data rate of _________ Mbps.
- 155.520
- 51.840
- 1.454
- none of the above
B. 51.840
9. The lowest STM level has a data rate of _________ Mbps.
- 155.520
- 51.840
- 1.454
- none of the above
A. 155.520
10. The highest STS level has a data rate of _________ Mbps.
- 155.520
- 51.840
- 9953.28
- none of the above
C. 9953.28
11. The highest STM level has a data rate of _________ Mbps.
- 155.520
- 51.840
- 9953.28
- none of the above
C. 9953.28
12. If three STS-1s are multiplexed, we get an _________.
- STS-3
- STS-2
- STS-4
- none of the above
A. STS-3
13. If two STS-1s are multiplexed, we get an _________.
- STS-3
- STS-2
- STS-4
- none of the above
D. 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
A. STS multiplexer
15. The path overhead can be removed from a SONET frame only by a ________.
- STS demultiplexer
- add/drop multiplexer
- regenerator
- none of the above
A. STS demultiplexer
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
C. a and b
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
D. All of the above
18. An STS-1 frame has _______ rows.
- 1
- 3
- 9
- none of the above
C. 9
19. An STS-1 frame has _______ columns.
- 9
- 90
- 900
- none of the above
B. 90
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
C. equal to
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
A. three times
22. An STS-1 frame contains _______ octets.
- 90
- 810
- 80
- none of the above
B. 810
23. An STS-1 frame contains _______ bits.
- 6000
- 6840
- 6480
- none of the above
C. 6480
24. Section overhead in an STS-1 frame contains _______ octets.
- 18
- 9
- 12
- none of the above
B. 9
25. Line overhead in an STS-1 frame contains _______ octets.
- 18
- 9
- 12
- none of the above
A. 18
26. Path overhead in an STS-1 frame contains _______ octets.
- 18
- 9
- 12
- none of the above
B. 9
27. In STS-1, _______ frames are sent per second.
- 4000
- 6000
- 8000
- none of the above
C. 8000
28. All VTs have _______ rows.
- 12
- 9
- 6
- none of the above
B. 9
29. A VTx has _______ columns.
- x
- 2x
- 2
- none of the above
B. 2x
30. A VT1.5 has _______ columns.
- 3
- 2
- 4
- none of the above
A. 3
