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400-007 · Question #102
400-007 Question #102: Real Exam Question with Answer & Explanation
The correct answer is A: inherent topology flexibility and service protection provided without penalty through intelligent. DWDM's primary advantages are the ability to expand bandwidth over existing fiber infrastructure and inherent topology flexibility with intelligent service protection provided without performance penalty.
Question
Which two advantages of using DWDM over traditional optical networks are true? (Choose two.)
Options
- Ainherent topology flexibility and service protection provided without penalty through intelligent
- Bability to expand bandwidth over existing optical Infrastructure
- Cinherent topology flexibility with built-in service protection
- Dinherent topology flexibility with intelligent chromatic dispersion
- Einherent topology flexibility with a service protection provided through a direct integration with an
Explanation
DWDM's primary advantages are the ability to expand bandwidth over existing fiber infrastructure and inherent topology flexibility with intelligent service protection provided without performance penalty.
Common mistakes.
- C. This option omits the 'without penalty' and 'intelligent' qualifiers that are key distinguishing features of DWDM protection, making it an incomplete description that does not accurately represent the DWDM advantage.
- D. Chromatic dispersion is a physical impairment that DWDM systems must actively compensate for, not a benefit - it causes pulse spreading and signal degradation, representing a challenge rather than an advantage.
- E. This option implies that service protection requires direct integration with an external system, which contradicts DWDM's defining characteristic of inherent, built-in protection that operates independently without external system dependencies.
Concept tested. DWDM advantages over traditional optical networks
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