Huawei H31-311_V2.5-ENU Exam Dumps (V9.02)- Get High-Quality Exam Questions & Answers for HCIA-Transmission V2.5 Exam Preparation

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Huawei HCIA-Transmission V2.5 Certification H31-311_V2.5-ENU Free Dumps

1. FAS is the frame alignment overhead, with a length of 6 bytes, located in the 1st row and the 1st to 6th columns. The 1st to 3rd bytes are 3 OA1 bytes, each OA1 is always "1111 0110", which is F6 in hexadecimal. The 4th to 6th bytes are 3 OA2 bytes, each OA2 is always "0010 1000", which is 28 in hexadecimal.

2. LDG supports electrical layer scheduling at the ODU1 level.

3. The number of network elements (including REG) in a two-fiber bidirectional multiplex section shared protection ring can exceed 16.

4. In Ethernet, the frame length has a lower limit, which is mainly due to the following considerations?

5. When serious bit error seconds occur in the PM segment of ODUk, the network management will report the ODUk_PM_ES alarm.

6. If a network port that supports auto-negotiation is connected to a network port that does not support auto-negotiation, half-duplex may be used instead of full-duplex.

7. OSN 3500 has strong branch service up and down capabilities, with 16 branch outgoing line slots, 504 2M, 32 E4, 117 E3/DS3, 132 STW-1e up and down on a single subrack, providing STM-1/4/16/64 group rate.

8. The levels of forced switching, fiber break switching, manual switching, and practice switching are arranged from high to low.

9. Physical port: also known as MAC port, which is the external port of the board.

10. Which of the following is not included in the basic architecture of MPLS L2VPN?

11. If a bit error is detected in the B1 byte, which of the following alarms will be reported by the other end?

12. For OSN6800 equipment, which of the following slots does not have an electrical layer cross-backplane bus?

13. The dispersion coefficient is the time delay difference caused by the optical wavelength signal passing through the unit length of optical fiber within the unit wavelength interval. Which of the following is the unit of the dispersion coefficient?

14. When LCK is inserted into the local ODUk signal, which processing will the downstream station system not perform?

15. Pointer adjustment is related to which of the following?

16. Which of the following descriptions about multiplexing is correct? During byte interleaving multiplexing, the information payload and pointer bytes of each frame are interleaved and multiplexed according to the original values, and the segment overhead is also multiplexed accordingly.

17. The current sparse wavelength division multiplexing system generally operates in the band from 1271nm to 1611nm. Which of the following is the channel spacing?

18. How many 2M business work boards does OSN 7500 support at most? Which of the following is correct?

19. Which of the following alarms is not a switching condition for a two-fiber bidirectional multiplex section protection ring?

20. Which of the following databases is used by U2000 on PC/WIN2003?

21. MPLS is a label forwarding technology. Which of the following was its original design purpose?

22. A. The value range of U-PTR is 0~782. When the receiving end receives invalid pointer values for 8 consecutive frames, which of the following alarms will the device generate?

23. Which of the following is the monitoring overhead used to monitor and report OTUk_DEG and OTUk_EXC alarms.

24. Which of the following statements is wrong?

25. Which of the following boards supports QinQ function?

26. Which of the following descriptions about the FIU board is correct?

27. The multi-frame loaded 2M signal is the information of which time period?

28. In terms of protection capability, which of the following topologies has the strongest protection capability?

29. What is the function of the overhead TCM in ODUk?

30. In which of the following optical fibers will the four-wave mixing phenomenon be most serious when the optical signal propagates, and will also cause the greatest transmission damage?

31. Which of the following reasons will not cause the network management to report a MUT_LOS alarm?

32. The SDH frame structure is a rectangular block frame based on which of the following options?

33. RAMAN amplifier utilizes which of the nonlinear effects?

34. The negative adjustment position of the TU pointer is at which of the following bytes?

35. A 2.2m cabinet can accommodate up to which of the following OSN 2500 sub-racks?

36. A two-fiber ring topology consists of three network elements, which are arranged in counterclockwise order as A, B, and C. The service between A and C occupies the 48th VC-12 time slot in the first VC-4 on the short-path line. Then the service between B and C can also occupy the 48th VC-12 time slot in the first VC-4 on the short-path line. Which of the following is the protection subnet type of the ring network?

37. Which of the following is not an advantage of using QinQ technology?

38. To which of the following levels does the U2000 network management belong?

39. MPLS is not a service or application, it is actually a tunnel technology.

40. The Ethernet board has an external port (Port) and an internal port (VCTRUNK). The external port can set the Tag attribute, but the internal port cannot set the Tag attribute.

41. STM-N signals must be scrambled when transmitted on the line, mainly to facilitate the receiving end to extract the line timing signal. All bytes in the SDH frame structure will be scrambled.

42. OChr means using electrical monitoring technology

43. FAS is the frame alignment overhead with a length of 6 bytes. The 1st to 3rd bytes are 3 OA1 bytes, each OA1 is always "1111 0110"; the 1st to 6th bytes are 3 OA2 bytes, each OA2 is always "0010 1000". OA1 and OA2 are the frame alignment bytes of this frame signal, which are equivalent to A1 A2 in the SDH frame structure.

44. When the bridge uses IVL learning mode, an entry in the MAC address table is created based on the original MAC address and original port of the data frame. This entry applies to all VLANs

45. If SNCP services with the same source, sink or route are grouped, the SNCP switching speed can be improved.

46. The device IP addresses of the gateway network element and non-gateway network element must be set in the same network segment.

47. When configuring LMSP, there are two switching modes: single-ended switching and dual-ended switching. Single-ended switching does not require the protection protocol to be enabled.

48. Linear MSP (LMSP) has two modes: 1+1 and 1:1. Additional services can only be configured for the protection channel in the 1:1 mode of LMSP.

49. The clock unit can only access the external clock source as the timing signal source of the system through the external clock interface. In addition, it can also output the processed clock and provide the clock source for other devices that need timing.

50. Which of the following IP addresses is a Class C IP address?


 

 

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