Both OTUCn and ODUCn can complete the functions of digital field and channel layer.

Question

Options

• ATrue
• BFalse

• A
  25% (9)
• B
  75% (27)

Explanation

Option B (False) is correct because OTUCn and ODUCn serve different and distinct roles in the OTN hierarchy - they do not each independently fulfill both functions. OTUCn operates at the digital section layer (sometimes called the "field" layer), handling regenerator-section-level functions such as framing, FEC, and physical transport overhead. ODUCn, by contrast, operates at the digital channel/path layer, managing end-to-end path monitoring and tandem connection monitoring for the payload. The two work together to cover both layers, but neither one alone - nor both together in the same role - performs both functions simultaneously.

Option A (True) is wrong because it incorrectly implies that each of these entities independently covers the full scope of both the section and channel layers, which misrepresents how OTN layer separation works.

Memory tip: Think of OTUCn as handling the Carrier/section side (the physical transport tunnel), and ODUCn as handling the Data channel (the logical path within that tunnel). The "U" in both stands for "Unit," but their prefixes - Transport vs. Data - signal their distinct layer responsibilities.

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