Most Recent Huawei H31-311 Exam Dumps

Prepare for the Huawei HCIA-Transmission V2.0 exam with our extensive collection of questions and answers. These practice Q&A are updated according to the latest syllabus, providing you with the tools needed to review and test your knowledge.

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The questions for H31-311 were last updated on Jul 22, 2026.

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Question No. 1

In the frame structure of SDH signals, there are abundant overhead bytes used for operation, administration, and maintenance (OAM). The overhead bytes account for ( ) of all bits in the entire frame and greatly enhance the monitoring functions of the network.

A1/10

B1/20

C1/30

D1/40

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Correct Answer: B

Question No. 2

After an optical fiber is connected according to the networking diagram, if a critical alarm is reported on the optical port, the SRV indicator on the line board is red.

ATRUE

BFALSE

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Correct Answer: A

Question No. 3

The pointer is used for alignment and indicates the start position of VC-n in the corresponding AU or TU frame. In this way, the receive end can correctly remove the corresponding VC from the STM-N, and then split the VC and C encapsulation to separate low-rate signals, such as PDH. That is, low-rate tributary signals can be directly dropped from the STM-N signal.

ATRUE

BFALSE

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Correct Answer: A

Question No. 4

SES: There are 5% or more than 5% bit error blocks or at least one defect (OCI/AIS/LCKAAE/LTCA1M/PLM) within one second.

ATRUE

BFALSE

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Correct Answer: B

Question No. 5

Which of the following statements about overhead bytes is incorrect?

AA1 and A2 are framing bytes. These bytes are used to separate STM-1 frames in a signal flow.

BJ0 is a regenerator section trace byte. This byte is used to repeatedly transmit a section access point identifier, so that the receive end can verify its continuous connection to the specified transmit end.

CB1 is bit interleaved parity-8 (BIP-8). This byte is used to monitor bit errors at the regenerator section layer.

DE1 and E2 are orderwire bytes. These bytes are used to provide a voice channel for orderwire connections.

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Correct Answer: A

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