Huawei H31-311_V2.5 Practice Exam Questions & Answers
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· Last reviewed: October 8, 2026
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Exam Facts
Huawei H31-311_V2.5 Exam Details
Key details for this exam, checked against the published exam outline
246
Practice Questions (Our Bank)
120 minutes
Exam Duration
- Exam Code
- H31-311_V2.5
- Full Name
- HCIA-Transmission V2.5
- Issuing Body
- Huawei
- Question Format (Our Bank)
- Multiple Choice
Practice Questions
Free H31-311_V2.5 Practice Questions
Each question shows the correct answer and an explanation of why it is right
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Frame-Mapped GFP (GFPF> is a processing mode that targets data encoding blocks such as Fibre Channel and ESCON.
Correct Answer:
B
Explanation
WDM (Wavelength Division Multiplexing) advantages include increasing transmission capacity, enabling long-distance communication, and improving network efficiency. However, WDM is not a replacement for SDH equipment. SDH and WDM operate at different layers and serve different purposes. SDH handles frame structure and signal multiplexing, while WDM manages optical wavelengths. They are complementary technologies rather than alternatives, making option C the correct answer for what is not an advantage.
Which of the following clock operating modes supports the ITU-T G.781 standard? (Multiple choice).
Correct Answer:
A, B, C
Explanation
In SDH frame structure, scrambling is applied to the payload and certain overhead bytes to maintain clock recovery and prevent long sequences of identical bits. However, the A1 and A2 bytes serve as frame alignment signals and must remain unscrambled so equipment can detect and synchronize to the frame. The J0 byte, which carries path trace information, is also not scrambled. These three bytes remain in their original form to enable proper frame detection and management functions.
Which of the following alarm/event storage modes does U2000 support? (Multiple choice).
Correct Answer:
A, C, D
Explanation
The VC-4 J1 byte indicates the frame association identified by the AU pointer in the current frame. When the AU pointer value indicates that the VC-4 begins in the next frame rather than the current one, the J1 byte reflects this relationship. The J1 byte essentially tracks where the actual VC-4 payload container starts relative to the current STM frame being processed. This allows proper identification of payload boundaries across frame transitions.
Which of the following bytes in the regenerator part overhead are associated with R-OOF and R-LOF? (Multiple Choices)
Correct Answer:
A, B
Which of the following is not the northbound interface provided by the U2000?
Correct Answer:
D
Explanation
MSP (Multiplex Section Protection) is a network-level protection mechanism that operates independently of whether actual services are present on the ring. The MSP protection scheme continuously monitors the working and protection paths and executes switching and recovery procedures based on signal quality and failures. Even if the ring carries no active services, the MSP mechanism remains functional and will respond to detected faults. This makes the statement true because MSP's operation is not dependent on service presence.
For osn3500, which of the following boards provides centralized backup capability for the +3.3V power supply of each board in the sub-shelf?
Correct Answer:
B
Explanation
This question concerns multiplexing and tributary slot allocation in transmission networks. VC-12 time slots must be assigned consecutively within a single VC4 container to function properly as a trunk. The fourth VC4 slot can accommodate slots 1 and 2 for VCTRUNK1. Other options likely violate the requirement that VC-12 slots must be contiguous within the same VC4 container, or they attempt to split the trunk across multiple VC4s, which breaks the logical binding needed for the trunk to operate correctly.
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Study Guide
What the Huawei H31-311_V2.5 Exam Covers
7 domains from the Huawei H31-311_V2.5 exam outline, with approximate weightings. Every sample question above is tagged
with the domain it comes from
Domain 1: HPE Aruba Mobility Fundamentals
This section covers topics such as knowledge of WLAN controller components, design principles, deployment considerations, and configuration basics.
Domain 2: Mobility Controllers and Network Design
This portion evaluates your understanding of WLAN controller elements, architectural principles, implementation factors, and fundamental setup procedures.
Domain 3: Client Onboarding and Access Control
This segment encompasses WLAN authentication protocols, authorization strategies, and methods for controlling access.
Sample question from this domain above:
Q4
Domain 4: Policy Enforcement and Security
In this section, topics covered are WLAN security standards, creating and implementing secure access policies, and identifying potential wireless network vulnerabilities
Domain 5: Wireless LAN (WLAN) Technologies
This area examines WLAN protocols, management of radio resources, and strategies for channel planning.
Sample questions from this domain above:
Q1Q2Q3Q6
Domain 6: High Availability and Scalability
This section addresses redundancy protocols in WLAN implementations, considerations for scaling high-density networks, and techniques for balancing loads.
Sample question from this domain above:
Q5
Domain 7: Troubleshooting and Monitoring
This segment assesses candidates' abilities to diagnose common WLAN issues and utilize tools for monitoring network health.
