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
正确答案:A
答案解析:有

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