问题

Scrambling of SONET signals is done to

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

参考解析：

分类：CCNP(642-311)题库

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