HCIA-Transmission V2.0 Mock Exam [PDF]

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HCIA-Transmission V2.0 mock exam 1. (true or faulse) Maintenance of SDH devices is easier than that of PDH devices because SDH signals provide more overhead bytes for operation, administration and maintenance (OAM).



2. (true or faulse) If bit errors occur in the SDH network, the decapsulated service signals must contain bit errors.



3. (true or faulse) The SDH frames are transmitted byte-by-byte from left to right, row-by-row, and frame-by-frame.



4. (true or faulse) The 8 Mbit/s PDH signals can be multiplexed to STM-N signals.



5. (true or faulse) The data communication channel (DCC) bytes form a physical channel for transmitting OAM information.



6. (true or faulse) Lower level alarms are often reported upon the generation of a higher level alarm.



7. (true or faulse) WDM systems can be classified into unidirectional WDM systems and bidirectional WDM systems based on the signal transmission directions over optical fibers. Most WDM systems use the two-fiber unidirectional transmission mode.



8. (true or faulse) Theoretically, a multiplexer and a demultiplexer are similar and differ only in the light output and input directions.



9. (true or faulse) ESCs are widely used in DWDM systems.



10. (true or faulse) FAS bytes in the OTUk overhead should not be scrambled. Scrambling is implemented after the FEC portion is computed and added to an OTUk signal.



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HCIA-Transmission V2.0 mock exam



11. (true or faulse) The SM, PM, and TCMi overheads on the OTN electrical layer all contains a one-byte BIP-8 field. The monitoring range of this field varies with the overhead.



12. (true or faulse) A VCRTUNK is an internal port of a board. It consists of several bound virtual containers (VCs) to function as an internal transmission channel of an Ethernet board.



13. (true or faulse) The default user of U2000 is admin, which belongs to NM administrators group. But it is higher user than other administrator users. So it is called super user. You cannot change the authority of admin user and switch it to other group. For the security, you should change the password of admin user and create some new users.



14. (true or faulse) When the Tag Attribute of Ethernet port is Hybrid, so it can transmit both tagged and untagged frames.



15. (true or faulse)In the two-fiber bi-directional multiplex section protection ring, you need to configure only services on the working channel.



16. (multiple choice) An SDH frame is composed of( ). A. Frame header B. Section overhead C. Information payload D. Administrative unit pointer



17. (multiple choice) The 2 Mbit/s signals are now most widely used. The procedures for multiplexing the 2 Mbit/s signals to STM-N signals include ( ). A. Rate adaptation B. Adding pointers



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HCIA-Transmission V2.0 mock exam C. Adding section overheads D. Scrambling



18. (multiple choice) A WDM system is composed of( ) . A. OTU/TU/LU B. OM/OD C. OA D. OSC/ESC E. XCS



19. (multiple choice) The correct descriptions about section monitoring (SM) bytes in the OTUk overhead include ( ). A. The first SM byte is a trail trace identifier (TTI). B. The second SM byte is a bit interleaved parity-8 (BIP-8) byte. C. The BIP-8 byte is used for ODUk-level bit error detection. D. The third SM byte is used for the backward defect indication (BDI), backward error indication (BEI), and incoming alignment error (IAE). It also contains reserved (RES) bits.



20. (multiple choice) Hub/Spoke (Ethernet LAN Service) is used to separate packets between the logical ports in the network bridge. Which of the following descriptions are correct if the logical ports are in the same VB VLAN filter or plain bridge? A. Communication is available between ports configured with Hub. B. Communication is available between a port configured with Spoke and a port configured with Hub. C. Communication is unavailable between ports both configured with Spoke.



21. (single choice) Among all the overheads in an SDH frame, the widest monitoring range is provided by ( ).



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HCIA-Transmission V2.0 mock exam A. Regenerator section overhead (RSOH) B. Multiplex section overhead (MSOH) C. Higher order path overhead D. Lower order path overhead



22. (single choice) The byte that can be used for setting up an orderwire connection between two regenerators is( ). A. E1 B. E2 C. E1 and E2 D. None of the above



23. (single choice) Among the following topologies, the best protection capabilities are provided by( ). A. Chain topology B. Star topology C. Tree topology D. Ring topology E. Mesh topology



24. (single choice) In non-coherent DWDM system, among the following optical sources, the highest dispersion tolerance and reliability can be provided by( ). A. Directly modulated optical source B. Optical source modulated by an electro-absorption modulator C. Optical source modulated by a Mach–Zehnder interferometer D. None of the above



25. (single choice) Which boards have a smaller noise figure and provide for a longer



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HCIA-Transmission V2.0 mock exam transmission distance so that can substantially reduce the number of electrical regenerators? A. OAU B. OBU C. RAU D. BPA



26. (single choice) The ODUk overhead does not include ( ). A. PM B. TCM C. NJO D. APS/PCC



27. (single choice) A 2.2 m high cabinet can accommodate a maximum of ( ) OptiX OSN 3500 subracks. A. 1 B. 2 C. 3 D. 4



28. (single choice) The timing unit of OSN equipment may work in three working modes. Which mode means that timing unit work normally? A. Tracing mode B. Hold-over mode C. Free-run mode D. Receiving mode



29. (single choice) What is the receiver sensitivity of OSC? A. -32dBm



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HCIA-Transmission V2.0 mock exam B. -40dBm C. -48dBm D. -52dBm



30. (single choice) No alarm is returned upon( ). A. R-LOS B. MS-AIS C. TU-AIS D. HP-TIM



Answer：1.T， 2.F， 3.T， 4.F， 5.T， 6.T， 7.T， 8.T， 9.F， 10.T， 11.T， 12.T， 13.T， 14.T， 15.T， 16.BCD， 17.ABC， 18.ABCDE， 19.ABD， 20.ABC, 21.A， 22.A， 23.E， 24.C， 25.C， 26.C， 27.B， 28.A， 29.C， 30.A



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