Free Huawei H31-311-ENU Exam Dumps Questions & Answers

RSOH, MSOH, HPOH, and LPOH implement monitoring functions in the descending order of monitoring scope.

• A.  FALSE
• B.  TRUE

On a Layer 2 switching device, if the Ethernet port is an Access port, the port can receive only the Ethernet frames without VLAN tags or Ethernet frames with the same VLAN ID as the default VLAN ID of the port.

• A.  FALSE
• B.  TRUE

Automatic laser shutdown (ALS): When no optical signal is received, the ALS function automatically shuts down the corresponding optical module. This function protects onsite maintenance personnel.

• A.  FALSE
• B.  TRUE

Which of the following are the device-level protection schemes of SDH products? (Multiple Choice)

• A.  Power supply protection
• B.  Cross-connect and timing board protection
• C.  TPS protection
• D.  System control board protection

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