An optical cableQ

第1题：

第2题：

In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?（）

• A、the signal to noise of the current optical amplifier
• B、the signal to noise of the previous amplifier or source
• C、the signal to noise introduced by the optical multiplexer
• D、the accumulated noise to signal ratio of the optical channel

第3题：

第4题：

InDesign默认字偶距使用哪种方法？（）

• A、光学（Optical）
• B、手工（Manual）
• C、韵律法（Metrics）
• D、光学——罗马字符（Optical——Roman）

第5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.

第6题：

Optical fiber光纤

第7题：

What three in combination are factors that can cause four-wave mixing in fiber-optic cables? （）(Choose three.)

• A、low optical power
• B、high optical power
• C、few optical channels
• D、many optical channels
• E、low chromatic dispersion
• F、high chromatic dispersion
• G、too much power differential in the optical channels

第8题：

第9题：

A customer reports the optical drive is no longer responding. Which of the following questionsshould be asked FIRST?（）

• A、“Did you log in with an administrator account?”
• B、“Have you been to any inappropriate websites?”
• C、“What have you changed since the optical drive worked properly?”
• D、“What has changed since the optical drive worked properly?”

第10题：

display interface pos命令输出信息Rx Optical Power、Tx Optical Power表示（）。