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Huawei HCIA-Transmission V2.5 : H31-311_V2.5

H31-311_V2.5

Exam Code: H31-311_V2.5

Exam Name: HCIA-Transmission V2.5

Updated: Sep 19, 2026

Q & A: 750 Questions and Answers

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Huawei H31-311_V2.5 Exam Syllabus Topics:
SectionWeightObjectives
Topic 1: Packet Transport Network (PTN)15%- QoS Mechanisms
- PTN Protection Mechanisms
- MPLS-TP Principles
Topic 2: SDH/SONET Technology20%- SDH Frame Structure
- SDH Multiplexing Principles
- SDH Equipment and Interfaces
- SDH Protection Mechanisms
Topic 3: Huawei Transmission Products Overview15%- OSN 3800/5800/6800/8800 Series
- Product Portfolio and Positioning
- OSN 1800 Series
Topic 4: OTN Technology25%- OTN Architecture and Structure
- WDM Principles
- OTN Protection
- ROADM Technology
- ODU and OTU Mapping
Topic 5: Transmission Network Maintenance15%- Performance Monitoring
- Network Commissioning
- Typical Troubleshooting
- Common Alarm Analysis
Topic 6: Optical Communication Basics10%- Optical Communication Principles
- Optical Fiber Types and Characteristics
- DWDM Fundamentals
Huawei HCIA-Transmission V2.5 Sample Questions:

Question #1
Which of the following statements are correct regarding the use of J0 bytes? (Multiple choice)

A. If the J0 byte is mismatched, all "1"s are inserted into the lower level signal
B. This byte is used to repeatedly send the segment access point identifier
C. There is only one J0 byte in the STM-N frame
D. The J0 byte indicates the position of each STM-1 in the STM-N


Question #2
UNS5 board supports mixed transmission of OTN services, SDH services and packet services with a total bandwidth not exceeding 200Gbit/s.

A. True
B. False


Question #3
According to the number of optical fibers between adjacent network element nodes, the self-healing ring can be divided into () and ()


Question #4
The LOI low-level interface includes multiple logical function blocks. Which of the following does not belong to the function blocks in the LOI low-level interface?

A. PPI
B. SPI
C. LPT
D. LPA


Question #5
What are the main advantages of WDM? (Multiple choice)

A. Can completely replace SDH equipment
B. The system is easy to upgrade and can protect existing investments to the greatest extent possible during the upgrade
C. Compatible with future all-optical switching networks
D. Ultra-large capacity, "transparent" data transmission
E. High networking flexibility, economy and reliability


Solutions:

Question #1
Correct Answer: B,C,D
Question #2
Correct Answer: A
Question #3
Correct Answer: Only visible for members
Question #4
Correct Answer: B
Question #5
Correct Answer: B,C,D,E

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