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Exam Code: H31-311_V2.5
Exam Name: HCIA-Transmission V2.5
Updated: Sep 07, 2026
Q & A: 750 Questions and Answers
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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Optical Communication Basics | 10% | - Optical Fiber Types and Characteristics - DWDM Fundamentals - Optical Communication Principles |
| Topic 2: Huawei Transmission Products Overview | 15% | - OSN 1800 Series - OSN 3800/5800/6800/8800 Series - Product Portfolio and Positioning |
| Topic 3: OTN Technology | 25% | - WDM Principles - OTN Protection - ODU and OTU Mapping - ROADM Technology - OTN Architecture and Structure |
| Topic 4: SDH/SONET Technology | 20% | - SDH Protection Mechanisms - SDH Multiplexing Principles - SDH Equipment and Interfaces - SDH Frame Structure |
| Topic 5: Transmission Network Maintenance | 15% | - Typical Troubleshooting - Performance Monitoring - Common Alarm Analysis - Network Commissioning |
| Topic 6: Packet Transport Network (PTN) | 15% | - MPLS-TP Principles - PTN Protection Mechanisms - QoS Mechanisms |
Question 1
The high-speed railway engineering disaster prevention and communication interface is the () interface.
Question 2
Which of the following optical fibers has the following dispersion characteristics: the dispersion is 0 at 1310nm, and the typical dispersion coefficient is 17ps/nm.km near 1550nm?
A. G.654
B. G.653
C. G.655
D. G.652
Question 3
Which of the following is the step for China to multiplex 2M into AUG?
A. C-12->VC-12->TU-12->TUG-2->TUG-3->VC-4->AU-4->A0G
B. C-12->VC-12->TU-12->TUG-2->VC-3->TUG-3->AU-4->AUG
C. C-12->VC-12->TU-12->VC2->TUG-2->FUG-3->AU-4->AUG
D. C-12>VC-12->TU-12->TUG-2->VC-3->AU-4->AUG
Question 4
MSTP equipment not only has the protection, recovery, OAM and other functions of SDH equipment, but also adds a service board that provides multi-service access.
A. FALSE
B. TRUE
Question 5
If a weak signal light and a strong pump light are transmitted simultaneously in an optical fiber, and the wavelength of the weak signal light is within the Raman gain bandwidth of the pump light, the energy of the strong pump light is combined into the oscillation mode of the silicon material of the optical fiber through stimulated Raman scattering (SRS), and then emitted at a longer wavelength, which is the wavelength of the signal light, thereby amplifying the weak signal light and obtaining Raman gain.
A. FALSE
B. TRUE
Solutions:
| Question 1 Answer: Only visible for members | Question 2 Answer: D | Question 3 Answer: C | Question 4 Answer: B | Question 5 Answer: B |
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