Which of the following statements about the definition of SDH is correct?

Question

Options

• AHierarchies available for asynchronous digital transmission
• BHierarchy of standardized digital signals that can be multiplexed asynchronously
• CHierarchy of standardized digital signals that can be cross-connected asynchronously
• DComplete standard digital signal hierarchy provides simultaneous digital transport multiplexing and

• A
  5% (2)
• B
  3% (1)
• C
  11% (4)
• D
  82% (31)

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