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Scrambling of SONET signals is done to （）.A、prevent the leakage of external fiber emissionsB、provide the optical network with the highest level of security possibleC、assure an even distribution of 1's and 0's for extended transmitter lifeD、assure an adequ

题目

Scrambling of SONET signals is done to （）.

  • A、prevent the leakage of external fiber emissions
  • B、provide the optical network with the highest level of security possible
  • C、assure an even distribution of 1's and 0's for extended transmitter life
  • D、assure an adequate number of transitions for clock recovery at the receiver
  • E、prevent the receiver from assuming AIS inadvertently when all 0's are received
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相似问题和答案

第1题：

assure sb of sth(英译中)


参考答案：使某人确信，向某人保证

第2题：

Which two statements are true about optical networks?()

A. SONET and SDH both use time-division multiplexing.

B. An optical transport network system uses time-division multiplexing.

C. SONET and SDH both use wavelength-division multiplexing.

D. An optical transport network system uses wavelength-division multiplexing.


参考答案：A, D

第3题：

This medicine will _____ you a good night’s sleep

A.make sure

B.reassure

C.ensure

D.assure


参考答案：C

第4题：

Scrambling of SONET signals is done to ().

A. prevent the leakage of external fiber emissions

B. provide the optical network with the highest level of security possible

C. assure an even distribution of 1‘s and 0‘s for extended transmitter life

D. assure an adequate number of transitions for clock recovery at the receiver

E. prevent the receiver from assuming AIS inadvertently when all 0‘s are received


参考答案：D

第5题：

What are three factors that limit the maximum distance of an amplified optical signal without regeneration? ()(Choose three.)

A. fiber dispersion

B. signal attenuation

C. transmitter power

D. amplifier bandwidth

E. receiver dispersion tolerance


参考答案：A, B, E

第6题：

A desktop computer’s sound card sends signals to external _____.

A. printer

B.speaker

C.Modem

D.keyboard


参考答案：B

第7题：

Risk management’s ( ) is to assure uncertainty does not deflect the endeavor from the business.

A.trend

B.detail

C.objective

D.rule


正确答案：C

第8题：

It can be inferred from Paragraph 5 that

[A] data leakage is more severe in Europe.

[B] FTC's decision is essential to data security.

[C] California takes the lead in security legislation.

[D] legal penalty is a major Solomon to data leakage.


正确答案：D

第9题：

Given the formula: (Fiber Attenuation * Km) + (Splice Attenuation * of Splices) + (Connector Attenuation * of Connectors) + (Optical Fiber or OADM) + Buffer(Fiber aging)) With regard to SONET/SDH optical calculations, what will the given formula provide?（）

A. fiber loss

B. OSNR level

C. post amplification

D. index of reflection

E. index of refraction

F. power post amplification budget


参考答案：A

第10题：

Dense Wavelength Division Multiplexing (DWDM) is an important innovation in optical networks.Which two descriptions best define DWDM?()

A. optical technology for transmitting up to 32 channels over multiple fiber strands

B. optical technology for transmitting up to 16 channels over multiple fiber strands

C. a WDM system that is compatible with EDFA technology

D. a technology for transmitting more closely packed optical signals using more sophisticated transceiver designs than CWDM .


参考答案：C, D

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