题目详情

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
A
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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