Free Huawei H31-311 Exam Dumps Questions & Answers

Which of the following ITU-T recommendations defines the OTN frame structure?

• A.  G.652
• B.  G.709
• C.  G.975
• D.  G.694

Frame-Mapped GFP (GFP-F) is a processing mode oriented to data coding blocks (such as Fiber Channel and ESCON).

• A.  FALSE
• B.  TRUE

Which of the following factors determines that the optical signal-to-noise ratio (OSNR) at the receive end decreases to a certain extent After signals are transmitted for a certain distance in a WDM system, the optical signal-to-noise ratio (OSNR) at the receive end decreases to a certain extent. Which of the following is the main cause?

• A.  Fiber attenuation is excessively high.
• B.  New types of optical fibers are not used.
• C.  Multiplexers and demultiplexers are used.
• D.  EDFAs are used.

Which of the following statements about the sequence of a signal flow between the SDH interface and the cross-connect unit is correct?

• A.  SPI< >RST< >MSA< >MSP< >MST< >HPT
• B.  SPI< >MST< >RST< >MSA< >MSP< >HPT
• C.  SPI< >RST< >MST< >MSP< >MSA< >HPT
• D.  SPT< >MST< >MSA< >RST< >MSP< >HPT

If the overhead bytes pass through the backplane bus between two slots, the two slots are called paired slots. Paired slots implement automatic transparent transmission of overhead bytes, such as (),(), and (). This improves MSP switching performance and protects DCC communication with other NEs even if the SCC board on the local NE is offline. (Multiple Choice)

• A.  B1 byte
• B.  E1 byte
• C.  D byte
• D.  K byte