Pass the Cisco CCDE v3.0 400-007 Questions and answers with CertsForce

D (Unique Local Addresses — ULA): IPv6 addresses in the FC00::/7 range, used for internal networks only, not routable over the global internet.

Ideal for campus or enterprise networks requiring internal-only addressability while avoiding conflict with global prefixes.

Why other options are incorrect:

A & B: Not valid IPv6 address types.

C: Link-local addresses (FE80::/10) are valid only for single-hop communication and cannot be routed even within the local campus.

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A modular, scalable network design aims to:

Localize faults

Reduce impact radius of failures

Enable automated fault detection and recovery

The primary operational driver is to reduce the need for manual intervention during failures, which translates to:

Faster recovery times

Consistency in troubleshooting

Improved service reliability

While minimizing app downtime (B) is a goal, it is a result of reducing human-required failure recovery. Option C is a business process goal, and D is an architectural challenge, not an operational driver.

This aligns with CCDE v3.1's “Network Architecture Principles” for building operationally resilient networks.

The SD-WAN architecture separates roles by function:

Orchestration Plane: Handles device lifecycle functions such as zero-touch provisioning (ZTP) and certificate distribution. It facilitates onboarding into the overlay securely and automatically.

Control Plane: Makes forwarding decisions and shares route and policy information.

Data Plane: Forwards packets.

Management Plane: Provides visibility, analytics, and template-based policy configuration.

Option A correctly identifies orchestration as the ZTP and bootstrapping component.

Security design must be aligned with:

Business objectives (A): Security design must meet business needs without hindering operations.

Security policies and standards (B): Compliance with internal and external regulations is mandatory.

CCDE v3.1 teaches that security design always starts from business intent and policy compliance, not purely technical or scope-based factors.

Why other options are incorrect:

C & D: Security design applies to all environments, not just multi-site or new deployments.

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A (Faster detection and response):Telemetry like IPFIX enables real-time network visibility and anomaly detection, significantly improving Mean Time to Detect (MTTD) and Mean Time to Respond (MTTR).

Other options explained:

B: IPFIX feeds data to incident response, but doesn't directly integrate plans.

C: IPFIX improves detection but primarily reduces response time.

D: Asset identification typically uses CMDB or inventory tools, not IPFIX alone.

Cisco SD-WAN Cloud OnRamp SaaS optimizes cloud application performance by dynamically measuring SaaS application paths from multiple branch edges toward the Microsoft 365 cloud.

It automatically selects the best-performing path, continuously monitors SLA metrics (latency, loss, jitter), and dynamically reroutes based on real-time performance.

This directly addresses SaaS resiliency across multiple ISPs with minimal manual intervention and is aligned with CCDE v3.1 SD-WAN design methodologies for SaaS optimization.

Why other options are incorrect:

A: Cloud OnRamp gateway is for IaaS optimization (AWS, Azure), not SaaS.

B: Cloud OnRamp SWG (Secure Web Gateway) is for internet-bound security inspection, not SaaS path optimization.

C: "Cloud OnRamp" alone is too general; SaaS is the specific solution for this SaaS use case.

In this case, the bank seeks a solution that addresses scalability, manageability, application visibility, security (encryption and segmentation), and operational simplicity while aiming to reduce capital expenses. All these characteristics point directly to an SD-WAN architecture.

A non-managed (self-hosted) SD-WAN deployment:

Supports Zero Touch Provisioning (ZTP), reducing deployment time and operational burden.

Provides application-level visibility and intelligent path control.

Enables strong segmentation and end-to-end encryption via templates and policy engines.

Helps reduce CAPEX through the use of lower-cost broadband and centralized management.

While a “managed SD-WAN” solution (Option C) might be suitable in some cases, it typically involves higher OPEX. The question emphasizes CAPEX reduction, favoring an in-house SD-WAN solution.

This approach aligns with CCDE v3.1's “Scenario-based Design Strategy Guidance” and “Technology Comparisons and Use Cases” topics that emphasize selecting technologies aligned to business objectives and architectural scalability.

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In IoT environments, especially in manufacturing plants, security is the primary concern during migration:

IoT devices often have limited security capabilities and may introduce vulnerabilities if not properly segmented, authenticated, and monitored.

Manufacturing plants operate critical systems where availability, safety, and integrity are paramount.

CCDE v3.1 emphasizes securing data, devices, and control systems as a top priority during IoT migrations.

Other options explained:

A: Sensors are part of the IoT solution but not the primary migration concern.

C: Applications are important but typically come after securing connectivity and endpoints.

D/E: Infrastructure elements are secondary to security in the migration assessment.

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C (Lack of visibility and tracking): In cloud-native environments, organizations often struggle with monitoring and tracking workloads across dynamic, distributed, and multi-tenant architectures. Traditional visibility tools may not fully cover cloud-native assets like containers, serverless functions, or microservices, making it harder to detect threats and enforce policies.

D (Increased attack surface): Cloud-native architectures introduce many additional components—APIs, microservices, third-party integrations, and distributed data—which all expand the organization's overall attack surface. More entry points for attackers create additional security challenges compared to traditional on-prem environments.

Other options explained:

A: User roles can be managed with proper IAM systems.

B: Polymorphism refers to code behavior in programming, not a core security challenge in cloud-native design.

E: Credential validation is part of basic access control but not a top cloud-native challenge compared to visibility and attack surface expansion.

The hierarchical LAN design model — access, distribution, core — provides:

Scalability through structured hierarchy (A).

Easier change management and staged deployments since functions are isolated at each layer (E).

CCDE v3.1 emphasizes hierarchy for long-term scalability, manageability, and operational stability.

Why other options are incorrect:

B: Modern data centers favor spine-leaf over traditional hierarchy.

C: The model simplifies rather than complicates.

D: Simplification is not its primary advantage — scalability and modularity are.

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