The main difference between the functional standardized optical transport unit OTUkV and the fully standardized optical transport unit OTUk lies in the allocation of FEC areas.

Question

Options

• ATrue
• BFalse

• A
  24% (6)
• B
  76% (19)

Explanation

B is correct because the main difference between OTUkV and OTUk is not the allocation (size or placement) of the FEC area - both maintain the same frame structure with the same FEC area size. The actual distinction is the type of FEC used: OTUk employs the fully standardized Reed-Solomon RS(255,239) FEC, while OTUkV ("V" = vendor-specific) allows proprietary/non-standardized FEC algorithms within that same area.

Why A (True) is wrong: Saying the difference lies in "FEC area allocation" is misleading because the FEC region occupies the same structural position and size in both unit types. The frame layout itself is not what changes - only the FEC implementation inside that region.

Memory tip: Think of the "V" in OTUkV as "Vendor's choice" - the vendor chooses their own FEC algorithm, but the frame real estate stays the same. If you remember that the area is fixed and only the algorithm changes, you'll never confuse area allocation with FEC type on the exam.

No community discussion yet for this question.