H31-311 Exam Details

  • Exam Code
    :H31-311
  • Exam Name
    :HCIA-Transmission V2.5
  • Certification
    :Huawei Certifications
  • Vendor
    :Huawei
  • Total Questions
    :256 Q&As
  • Last Updated
    :May 25, 2026

Huawei H31-311 Online Questions & Answers

  • Question 151:

    Configuring an EPLAN service as a ring is not recommended. If the EPLAN service is configured as a ring, the STP protocol must be enabled on the network to prevent broadcast storms.

    A. TRUE B. FALSE

  • Question 152:

    The SNCP switching speed can be improved if you classify the SNCP services that have the same source, sink, or route into groups.

    A. TRUE
    B. FALSE

  • Question 153:

    When an optical fiber between node A and node B is broken, the FIU on node B detects the OTS_LOS alarm and inserts the OTS_BDI alarm to node A. The FIU on node A reports the OTS_BDI alarm. The line board on the downstream C node reports the OCh_SSF alarm.

    A. TRUE
    B. FALSE

  • Question 154:

    For the OSN 3500, there is a slot mapping relationship between processing boards and interface boards. The processing board in slot 1 maps to the interface board in slot 19-20.

    A. TRUE
    B. FALSE

  • Question 155:

    In the case of 1+1 linear MSP, which of the following switching modes do not require the enabling of the APS protection protocol? (Choose two)

    A. Single-ended revertive mode
    B. Single-ended non-revertive mode
    C. Dual-ended revertive mode
    D. Dual-ended non-revertive mode

  • Question 156:

    Forced switching, fiber cut switching, manual switching, and exercise switching are in the descending order of priority.

    A. TRUE
    B. FALSE

  • Question 157:

    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.

    A. 1/10
    B. 1/20
    C. 1/30
    D. 1/40

  • Question 158:

    Which of the following clock working modes support the ITU-T G.781 standard? (Choose three)

    A. Tracing (Tracking)
    B. Holdover
    C. Free-run (Self-curved running)
    D. Master/Slave

  • Question 159:

    Which of the following is the default WTR time for MSP switching?

    A. 6 minutes
    B. 10 minutes
    C. 12 minutes
    D. 15 minutes

  • Question 160:

    Which of the following is the maximum number of OSN 3500 subracks that can be installed in a 2.2-meter cabinet?

    A. 1
    B. 2
    C. 3
    D. 4

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