In which three modes of operation can NCS 2000 100G+ coherent line cards operate? (Choose three.)

Question

Options

• Atransponder
• Bamplifier
• Ctrunk using a separate client card
• Dregenerator
• Eencryptor
• Fdispersion compensator

• A
  90% (19)
• B
  5% (1)
• E
  5% (1)

Explanation

NCS 2000 100G+ coherent line cards support transponder mode (A), trunk with a separate client card (C), and regenerator mode (D) because these are the three defined operational configurations for coherent DSP-based line cards in that platform. In transponder mode, the card converts a client signal directly to a coherent line-side wavelength; in trunk mode, it handles only the line side while a dedicated client card manages the client interfaces (essentially a muxponder split); and in regenerator mode, it receives a degraded signal, converts it to electrical, and re-transmits it as a fresh optical signal.

Why the distractors are wrong:

• B (Amplifier): Signal amplification is performed by dedicated EDFA modules, not coherent line cards.
• E (Encryptor): Encryption may be a feature within certain platforms, but it is not a standalone operating mode for the coherent line card.
• F (Dispersion compensator): Dispersion compensation is either handled by the coherent DSP internally or by separate DCF hardware-it is not an operating mode.

Memory tip: Think T-C-R - "The Coherent Radio" - Transponder, Client card + trunk, Regenerator. These three represent what a coherent card can be in a network (edge converter, split-role line card, or signal repeater), while the wrong answers describe what it cannot replace (amplifier hardware, dedicated encryptors, or dispersion modules).

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