The Erbium Doped Fiber Amplifier (EDFA) is a key component of the new-generation optical communication system. Which of the following are the features of the EDFA? (Multiple Choice)

Amplification of any wavelengths

Which of the following statements about the EFS4 board are correct? (Multiple Choice)

This board supports Layer-2 switching.

This board must be used together with a processing board.

The board interface an LC interface.

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

Cross-connect and timing board protection

System control board protection

Cross-connect and timing board protection

System control board protection

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

Single-ended non-revertive mode

The error correction capability of FEC is measured with the encoding gain. Which of the following statements about the encoding gain is incorrect?

The encoding gain of the inband FEC is larger than that of the outband FEC.

When the BER is constant, the OSNR saved by the correction encoding is called encoding gain.

The error correction capability of FEC increases with the encoding gain.

The encoding gain of the inband FEC is larger than that of the outband FEC.

The encoding gain of AFEC is larger than that of FEC.

After PDH services are configured on a per-NE basis, a complete trail cannot be searched out. Which of the following are possible causes? (Multiple Choice)

Line board selection is incorrect.

Timeslot configuration is incorrect.

Pass-through is not configured at intermediate sites.

Tributary board selection is incorrect.

Line board selection is incorrect.

Timeslot configuration is incorrect.

Pass-through is not configured at intermediate sites.

Which of the following technologies is the main difference between an open DWDM system and an integrated DWDM system?

Wavelength conversion technology

Optical amplification technology

Multiplexing/Demultiplexing technology

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

The FIU on node A reports the OTS_BDI alarm. The line board on the downstream C node reports the OCh_SSF alarm.

Which of the following statements about OTN advantages is incorrect?

OTN provides a maximum of five levels of nested or overlapped TCM connection monitoring.

The WDM function is used to meet the requirement for Tbit/s bandwidth per fiber.

OTN provides a maximum of five levels of nested or overlapped TCM connection monitoring.

OTN provides powerful outband FEC functions to effectively guarantee the line transmission performance.

OTN provides 2.7 Gbit/s, 10.7 Gbit/s, 43 Gbit/s, and even 111.8 Gbit/s high-rate interfaces.

Which of the following can be configured as the monitoring time of NE performance events?

Same as the current time of the NE

Which of the following is not an EVPLAN feature?

Point-to-point and point-to-multipoint topologies

Forwarding based on MAC addresses

Point-to-point and point-to-multipoint topologies

Multipoint-to-multipoint topology

Assume that 2 x VC-12 timeslots need to be bound with VCTRUNK1 of the N2EFS4 board. When 8 x VC-4 timeslots are available on the N2EFS4 board, which of the following timeslots meets the requirements?

VC-4 VC-12 timeslots 1 and 2 of the fourth

VC-12 timeslots 1 and 2 of the first VC-4

VC-12 timeslots 33 and 34 of the second

VC-4 VC-12 timeslots 1 and 2 of the fourth

VC-4 VC-12 timeslots 1 and 2 of the eighth VC-4

Which of the following statements about the signal label byte C2 is incorrect?

If the C2 byte mismatch is detected, an LP_SLM alarm is reported in the corresponding VC-4 channel.

The C2 byte is used to indicate the multiplexing structure of the VC frames and the payload property.

The C2 byte to be sent must match the C2 byte to be received.

If the C2 byte mismatch is detected, an LP_SLM alarm is reported in the corresponding VC-4 channel.

C2=00H indicates that the VC-4 is unequipped.

Huawei H31-311 Practice Test 4 - Free Online Exam Prep & Questions

SDH signals must be scrambled before being transmitted over optical fibers. Which of the following bytes are not scrambled? (Multiple Choice)

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