Huawei H31-341_V2.5 問題集

質問 1：
The EDFA amplifies service signals and brings noise to the system. It is the main source of noise.
A. False
B. True
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 2：
FILL BLANK
ODUk SNCP has three subtypes: _____, ______, and _____. (Enter the acronyms in uppercase letters.)
正解：
SNC, ISNC, SISNC/N Explanation:
The ODUk SNCP service defines three protection subtypes:
SNC (Subnetwork Connection)
ISNC (Inverse SNC)
SISNC (Simultaneous Inverse SNC)

質問 3：
Which of the following terms has the meaning that "the wavelength carrying local services can be transmitted to a specific direction"?
A. Colored
B. Directionless
C. Colorless
D. Directioned
正解：D
解説: (Topexam メンバーにのみ表示されます)

質問 4：
OOS overheads are optical-layer overheads. Which of the following statements about OOS overheads is false?
A. They include OCh overheads.
B. They include OTN overheads.
C. They include OTS overheads.
D. They include OMS overheads.
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 5：
The decrease of optical power when light passes through a passive optical component is called the____.
(Enter only letters.)
正解：
insertion loss
Explanation:
Insertion loss refers to the decrease of optical power that occurs when light passes through a passive optical component such as connectors, splitters, filters, or splices. This loss results from absorption, scattering, or imperfect coupling within the component. In optical transmission systems, insertion loss is a critical parameter affecting link budget and overall signal quality. HCIP-Transmission materials stress managing insertion loss to ensure sufficient power reaches the receiver and to maintain the integrity of transmitted signals over long distances. Proper component selection and maintenance help minimize insertion loss in WDM systems.

質問 6：
Which of the following tools are commonly used in WDM network commissioning? (Choose all that apply.)
A. Multimeter
B. Optical spectrum analyzer
C. Optical power meter
D. Screwdriver
正解：A,B,C
解説: (Topexam メンバーにのみ表示されます)

質問 7：
According to the conversion formula between mW and dBm, how much dBm is equivalent to 500 mW? (lg5
= 0.7)
A. 27
B. 43
C. 32
D. 30
正解：A
解説: (Topexam メンバーにのみ表示されます)

質問 8：
Which of the following causes a single channel to report the BEFFEC_EXC alarm?
A. The input optical power of an OTU board is too high or too low.
B. An optical amplifier board is faulty.
C. The external environment is abnormal.
D. Signals are severely attenuated during line transmission.
正解：A
解説: (Topexam メンバーにのみ表示されます)

質問 9：
Optical layer overhead alarm detection is implemented through optical layer overhead OOS. The R_LOS and MUT_LOS alarms are optical layer alarms and therefore are reported based on OOS detection.
A. TRUE
B. FAISE
正解：A
解説: (Topexam メンバーにのみ表示されます)