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Huawei H31-311 Practice Test - Questions Answers, Page 13

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Question 121

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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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Question 122

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The fiber core refractive index n1 must be ( ) the cladding layer refractive index n2, which is a necessary condition for transmitting optical signals in optical fibers.

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Question 123

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The STM-64 has () AU pointers.

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Question 124

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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)

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Question 125

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The management scope of an OMSn is the path from the input optical port on a multiplexer unit at the transmit site to the output optical port on a demultiplexer unit at the receive site, which is called an optical multiplexing section (OMS) path.

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Question 126

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

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Question 127

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For the OSN 3500, there is a slot mapping relationship between processing boards and interface boards. The processing board in slot 1 maps to the interface board in slot 19-20.

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Question 128

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

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Question 129

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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)

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Question 130

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The SL64 board can be used in an OSN 2500.

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Total 186 questions
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Related questions

Which of the following is the multiplexing mode of SDH?
Which of the following are the main advantages of SDH? (Multiple Choice)
The interval between two adjacent pointer justification events is at least ( ) frames.
According to ITU-T recommendations, the requirement that the MSP switching time should be within 50 ms is conditional. For example, the number of NEs on an entire ring network is less than 16.
Forced switching, fiber cut switching, manual switching, and exercise switching are in the descending order of priority.
The pointer is used for alignment and indicates the start position of VC-n in the corresponding AU or TU frame. In this way, the receive end can correctly remove the corresponding VC from the STM-N, and then split the VC and C encapsulation to separate low-rate signals, such as PDH. That is, low-rate tributary signals can be directly dropped from the STM-N signal.
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?
The last 256 columns in the OTN frame structure are FEC areas, which are used for forward error correction.
Which of the following is the frame structure of STM-16?
Frame-Mapped GFP (GFP-F) is a processing mode oriented to data coding blocks (such as Fiber Channel and ESCON).