Which three options are categories of components within an NCS 2000 system? (Choose three.)

Question

Options

• AROADM
• BLayer 1+ transport
• Camplification
• DLayer 0 transport
• Edispersion compensation
• Fcommons

• A
  3% (1)
• B
  94% (29)
• C
  3% (1)

Explanation

Cisco NCS 2000 components are organized into three high-level architectural categories: Layer 0 transport (optical-layer components like wavelength multiplexers/demultiplexers), Layer 1+ transport (higher-layer framing and mapping functions such as OTN/SDH line cards), and commons (shared infrastructure components like chassis, power supplies, fan trays, and controllers). These three categories represent the complete taxonomy Cisco uses to classify every card or module in the platform.

Why the distractors are wrong:

• A (ROADM) - A ROADM is a specific component within the Layer 0 transport category, not a category itself.
• C (amplification) - Amplifiers (e.g., EDFAs) are also Layer 0 transport components, not their own top-level category.
• E (dispersion compensation) - Dispersion compensation modules (DCMs) are likewise a subset of Layer 0 transport functionality, not a standalone category.

Memory tip: Think "LCD" - Layer 0, Commons, Done (Layer 1+). The three categories map to what the light does (Layer 0), what the bits do (Layer 1+), and what keeps the box running (Commons). Amplification and dispersion compensation are functions within the optical layer, not separate buckets.

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