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Which data aggregation error follows when an optical fiber network’s wavelength division multiplexing’s (WDM) timing drifts beyond thresholds?

A)Chromatic dispersion accumulation occurs exponentially
B)Polarization mode dispersion (PMD) increases linearly
C)Inter-symbol interference (ISI) induces bit errors
D)Four-wave mixing (FWM) crosstalk declines rapidly

💡 Explanation

Inter-symbol interference (ISI) causes digital errors because timing drift affects symbol distinction due to signal overlap; therefore error rates increase, rather than dispersion or beneficial crosstalk changes, impacting the receiver's capacity to correctly interpret data.

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