CCDE 400-007 Updated Exam

D: CWDM (Coarse Wavelength Division Multiplexing) shares parts of the same optical transmission window (1260–1625 nm) as DWDM but uses wider spacing between channels (typically 20 nm apart).

E: CWDM typically uses passive devices (multiplexers and demultiplexers) that require no electrical power, making deployment cost-effective.

Incorrect Options:

A: CWDM is better suited for shorter distances (up to ~80 km) and doesn't typically use optical amplifiers (EDFA). DWDM is better for long-haul with amplification.

B: 850 nm is used in multimode fiber systems (not CWDM).

C: CWDM supports up to 18 channels; DWDM supports up to 32 or more.

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Comprehensive and Detailed Explanation:

C: Moving workloads or backup/recovery functions to cloud platforms reduces capital expenditure by avoiding the cost of physical infrastructure, data centers, and maintenance. Cloud-based DRaaS (Disaster Recovery as a Service) offers scalability, resilience, and cost efficiency aligned with an OPEX model.

Other options:

A and B are security and software lifecycle tasks, not cost-effective DR strategies.

D increases CAPEX by building and maintaining additional infrastructure.

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B (Software as a Service - SaaS):SaaS provides end users with complete applications hosted and managed by third-party providers, accessed via web interfaces.

Other options explained:

A: PaaS provides platforms for application development, not complete applications.

C: IaaS provides compute/storage resources but not full applications.

D: WaaS (Workspace as a Service) is a niche model, not generally used as standard SaaS definition.

Increasing jitter buffer size smoothens jitter but at the cost of introducing additional delay.

Excessive jitter buffering can lead to perceptible audio or video lag, impacting user experience.

C: Therefore, the undesired effect is increased transport delay, potentially leading to quality issues if the buffer size is too large.

Why other options are incorrect:

A & D: Jitter buffering does not improve jitter itself; it masks it at the expense of delay.

B: Jitter compensation doesn't increase jitter, but delay.

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