300-420 Question 171
Select 4An enterprise is designing a high-capacity backbone network for its data centers using DWDM technology. The design must include redundancy and support up to 80 channels per fiber. Which of the following components or features are crucial for this DWDM deployment to meet these requirements?
- A
Optical amplifiers like Erbium-Doped Fiber Amplifiers (EDFAs)
- B
Multiplexers and demultiplexers for channel separation
- C
Coarse Wavelength Division Multiplexing (CWDM) modules
- D
Transponders for wavelength conversion
- E
Forward Error Correction (FEC) mechanisms
Show answer and explanation
Correct answers: A, B, D, E
Explanation
To design a high-capacity DWDM network capable of supporting up to 80 channels per fiber, key components like EDFAs for boosting signal strength, multiplexers/demultiplexers for channel management, transponders for wavelength conversion, and FEC mechanisms for data integrity are required. CWDM modules are not suitable as they do not support the channel density required for this deployment.
- A. Correct.
Optical amplifiers like EDFAs are essential in DWDM networks to boost the optical signal over long distances, ensuring the signal integrity is maintained.
- B. Correct.
Multiplexers and demultiplexers are critical in DWDM systems to combine multiple wavelengths into one fiber and separate them at the receiving end.
- C. Incorrect.
CWDM modules are not suitable for the given scenario as they support significantly fewer channels (typically up to 18), which does not meet the 80-channel requirement.
- D. Correct.
Transponders are used to convert client signals into DWDM-compatible wavelengths, making them a crucial component in the design of a DWDM network.
- E. Correct.
Forward Error Correction (FEC) mechanisms are important for ensuring data integrity by correcting errors that occur during transmission over DWDM links.