SDH的帧结构包含()。
- A.再生段开销、复用段开销、管理单元指针、信息净负荷
- B.通道开销、信息净负荷、段开销
- C.容器、虚容器、复用、映射
- D.再生段开销、复用段开销、通道开销、管理单元指针
正确答案及解析
正确答案
解析
SDH的帧结构由以下三部分组成：（1）段开销，包括再生段开销和复用段开销。段开销的作用是保证信息净负荷正常的供网络运行、管理、维护的字节。（2）管理单元指针：指向信息净负荷的第一个字节在帧内的准确位置。（3）信息净负荷：存放要传送的各种信息。
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