试题详情
- 单项选择题On an ONS 15454 node you can tunnel a（n） （）.
A、 SDH circuit over a SONET network delivering it as an SDH signal
B、 SDH circuit over a SONET network delivering it as a SONET signal
C、 SONET circuit over an SDH network delivering it as an SDH signal
D、 SONET circuit over an SDH network delivering it as a SONET signal
- A
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