H31-311_V2.5 Exam Questions

The outer electrons of the bait ion have a three-level structure, among which the metastable energy level is which of the following?

The OptiXtrans DC908 chassis is only equipped with 1 sCc board and 1 PANEL board and cannot be configured as 1+1 dual master control.

The LOI low-level interface includes multiple logical function blocks. Which of the following does not belong to the function blocks in the LOI low-level interface?

The correct statement about the multiplex section remote error indication MS-REI is (): 1. B2 byte is the transmission channel; 2. M1 byte is the transmission channel; 3. sent back...

Which of the following descriptions about signal marker byte C2 is wrong?

Which of the following media types has a transmission distance of no more than 1 km?

Which of the following descriptions about the TNG2M 402D board is wrong?

According to the OTU board naming rules, which of the following descriptions of the letters in the MS04 board is wrong?

Which of the following is not an advantage of EDFA?

Which logical function block generates the R-LOS alarm?

The segment overhead of STM-4 is 9*9*4 bytes/frame.

Which of the following descriptions about the PANEL panel on Optixtrans D908 is wrong?

Which subtype of tributary SNCP protection requires no electrical relay station in the subnet along which the ODUk signal passes?

Which of the following descriptions of OTM-nm and OTM-nr.m optical layer interfaces of OTN is wrong?

Among the following modulation technologies, which one performs best in terms of wavelength stability?

Which is the basic requirement of DWDM system for light source?

The refractive index of the core n1 ( ) cladding refractive index n2, which is a necessary condition for the transmission of optical signals in optical fibers.

Which of the following communication protocols does Huawei equipment not support for DCN networking?

How many frames is the minimum interval between two adjacent pointer adjustment events?

Which of the following is the switching point of linear multiplex segment protection?

Which new unit is added to Liquid OTN?

Which unit is newly added in Liquid OTN?

FOADM includes parallel FOADM and serial FOADM, both of which support any wavelength up to 40 wavelengths or 80 wavelengths.

Self-healing means that when a network failure occurs, the network automatically recovers from the failure in a very short time (ITU-T stipulates that it is within ()) without huma...

In the Colored & Directed scenario of 4D ROADM, how many sets of M40V+D40 are needed to dispatch local services to four directions?

Which of the following descriptions about overhead bytes is wrong?

Which of the following is not an advantage of SDH?

How many management unit pointers are there in the STM-64 frame structure?

Which of the following descriptions about the MD02 board is wrong?

If the overhead bytes pass through the backplane bus between two slots, the two slots are called paired slots. Paired slots enable automatic transparent transmission of overhead by...

Which of the following alarm/event dump modes does U2000 support? (Multiple choice)

SDH signals must be scrambled before transmission over optical fiber. Which of the following bytes is not scrambled? (Multiple choice)

Erbium-doped fiber amplifier (EDFA) is a key component of the new generation of optical communication systems. Which of the following is the function of EDFA? (Multiple choice)

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

Which of the following are device-level protection solutions for SDH products? (Multiple choice)

In the case of 1+1 linear MSP, which of the following switching modes does not require the APS protection protocol to be enabled? (Multiple choice)

Which of the following are the basic functions of U2000? (Multiple choice)

After configuring PDH services on a per-network element basis, a complete trace cannot be searched. Which of the following is a possible reason? (Multiple choice)

Which of the following logic function modules involve processing clock signals? (Multiple choice)

Which of the following is a step to multiplex low-speed services into high-speed SDH services? (Multiple choice)

For a (local) HA solution where the active and standby servers are deployed at the same location, which of the following platforms can be deployed? (Multiple choice)

Which of the following can be used as the central wavelength of the pump source in EDFA? (Multiple choice)

Which of the following different types of ESC are classified according to implementation principles? (Multiple choice)

In the system control unit, which of the following databases will not lose data after a power failure? (Multiple choice)

Which of the following statements about basic LCAS functions are correct? (Multiple choice)

Which of the following are components of a WDM system that multiplexes N wavelengths? (Multiple choice)

Which of the following options are low-loss areas of single-mode optical fiber? (Multiple choice)

Which of the following steps are generally required to multiplex low-speed services into high- speed SDH services? (Multiple choice)

What are the main advantages of WDM? (Multiple choice)

Compared with traditional SDH and SONET equipment, which of the following advantages does OTN have? (Multiple choice)