Which two options are modes of operation of the 2-port CFP line card? (Choose two.)

Question

Options

• A2 x 100G muxponder into 200G line card
• Btwo 40G transponders
• C2 x 40G muxponder client into one 100G line card
• Dtwo 100G clients into two 100G WDM line cards

• A
  6% (4)
• B
  14% (9)
• C
  80% (51)

Explanation

Options C and D describe the two valid operating modes of the 2-port CFP line card: in muxponder mode (C), two 40G client signals are aggregated and multiplexed onto a single 100G WDM wavelength on the line side; in transponder mode (D), each of the two CFP ports independently maps one 100G client signal to one 100G WDM line wavelength, giving two separate 100G optical channels.

Option A is wrong because the card does not produce a single 200G output - there is no 200G aggregation mode on this card; the maximum line-side rate per wavelength is 100G. Option B is wrong because the card does not function as standalone 40G transponders; 40G clients only appear in muxponder mode where they are combined up to a 100G line signal, not passed through independently as 40G wavelengths.

Memory tip: Think "2-port CFP = 2 modes - Mux up (2×40G → 1×100G) or Pass through (1×100G → 1×100G, twice)." The card always outputs 100G wavelengths - never 40G line signals and never 200G.

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