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In order to maintain the reach of a typical 100G WAN transport system(~1500km),several system improvements have to be made to recover the lost(  ),including the use of low-loss low-nonlinearity(  ),Raman amplification, and stronger error correction.

第 1 问

A. noise

B. SNR

C. speed

D. eeor

第 2 问

A. opticalfiber

B. traffic

C. internet

D. signaling

参考答案: B A

详细解析:

为实现典型的100G广域网传输(距离可达1500km),系统不得不采用一些能够改善提升信噪比的方法,包括使用低损耗、低非线性效应的光纤,拉曼放大器,和强纠错技术。

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