In addition to encryption, which other operation does the 10G Wire Speed Encryption line card perform?

Question

Options

• AOTN switching
• BDWDM transponding
• CSONET/SDH switching
• Ddispersion compensation

• A
  2% (1)
• B
  93% (56)
• C
  2% (1)
• D
  3% (2)

Explanation

Option B is correct because the 10G Wire Speed Encryption line card is designed to integrate two functions in a single card: encryption and DWDM transponding - converting client-side 10G signals into DWDM optical wavelengths for long-haul transport, all at line rate without performance degradation.

Why the distractors are wrong:

• A (OTN switching): OTN switching is a separate function handled by dedicated switching fabric, not bundled into this encryption card.
• C (SONET/SDH switching): Circuit-layer switching is performed by dedicated SONET/SDH switch modules, not encryption line cards.
• D (Dispersion compensation): This is a physical-layer optical function typically handled by dedicated Dispersion Compensation Modules (DCMs) placed inline in the fiber plant, not by a line card.

Memory tip: Think of the card as a "secure window to the WDM network" - it encrypts your data and transponds it onto a DWDM wavelength in one step. If the card already touches the optical layer for transponding, it makes sense to encrypt right there at the same point rather than adding a separate appliance.

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