Generally speaking, which of the following does not belong to the splitting ratio of the optical splitter in the PON? (Multiple choice)

Question

Options

• A1:8
• B1:18
• C1:14
• D1:4

• A
  18% (9)
• B
  74% (37)
• D
  8% (4)

Explanation

In PON (Passive Optical Network) systems, optical splitters use powers of 2 as their standard splitting ratios - 1:2, 1:4, 1:8, 1:16, 1:32, 1:64 - because splitting is achieved through cascaded binary (50/50) splits. Options B (1:18) and C (1:14) are not powers of 2, so they cannot be produced by standard passive optical splitters and do not belong to valid PON splitting ratios. Options A (1:8 = 2³) and D (1:4 = 2²) are both valid standard ratios and are therefore the distractors - they do belong, making them wrong answers to the "does not belong" question.

Memory tip: Think of PON splitter ratios as "doublers" - each stage doubles the port count (2, 4, 8, 16, 32…). If a ratio isn't on that doubling chain, it's not a standard PON splitter ratio.

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