400-007 Exam Dumps - Cisco Certified Design Expert (CCDE v3.1)

FCAPS stands for Fault, Configuration, Accounting, Performance, and Security.

D (Authentication) is not a management category within the FCAPS framework.

Authentication is part of security functions but not a standalone FCAPS category.

Why other options are correct FCAPS components:

A: Configuration management

B: Security management

C: Performance management

E: Fault management

—

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.

In this architecture:

A secure web proxy is introduced to inspect and filter all web (HTTP/HTTPS) traffic.

Remaining traffic (non-web) must pass through an NGFW with IPS capabilities.

Both the web proxy and NGFW reside between the collapsed distribution/core and internet edge.

To enforce that all web traffic is directed to the proxy appliance for inspection and non-web traffic follows its usual path to the NGFW:

A. Policy-Based Routing (PBR) on the Collapsed Core

This allows traffic classification based on destination port (e.g., TCP 80/443) and selectively reroutes web traffic to the proxy. Non-web traffic continues toward the NGFW. PBR is essential here because traditional routing (based only on destination IP) would not differentiate between traffic types.

D. Static Routing on the Appliance

The proxy appliance must return the traffic back toward the NGFW for final processing and internet egress. This is typically achieved using static routes on the proxy device, ensuring the return path sends packets back to the correct firewall interface for consistent inspection.

❌B. Policy-based routing on the internet edge: Not applicable here, as rerouting must occur closer to the source (collapsed core), before traffic reaches the internet edge.

❌C. Policy-based routing on firewalls: This adds unnecessary complexity. Firewalls should focus on enforcing security policies, not traffic redirection logic in this scenario.

This approach adheres to CCDE v3.1 best practices by separating policy enforcement functions and enabling scalable, deterministic traffic flow through layered security appliances.

SD-WAN design principles:

C: Centralized policy, simplified management, and dynamic path selection improve operational efficiency, directly resulting in cost savings.

D: SD-WAN provides centralized orchestration, automation, and zero-touch provisioning, simplifying deployment and scaling.

Why other options are incorrect:

A: SD-WAN improves performance with features like dynamic path selection but cannot inherently prevent slow underlay performance.

B: Many SD-WAN solutions logically separate control and data planes, but not all strictly follow full separation like traditional SDN.

E: SD-WAN is typically hardware-agnostic but does not depend on specialized switching hardware.

A (Change OSPF reference bandwidth): OSPF calculates path cost based on interface bandwidth using a formula where cost = reference bandwidth / interface bandwidth. The default OSPF reference bandwidth is 100 Mbps, which causes all faster links (1 Gbps and above) to appear with the same minimum cost.

Updating the reference bandwidth (e.g., to 10000 or higher) allows OSPF to assign accurate costs to faster links, enabling proper path selection that reflects real link capacities.

Other options explained:

B: Filtering is not the correct method for path optimization.

C: Changing interface bandwidth values is a workaround but not scalable or recommended compared to updating the reference bandwidth globally.

D: Summarization addresses prefix aggregation, not cost calculation.

—

C (Scalable):For rapidly growing or contracting businesses, scalability is the highest priority to ensure that the network can adapt to changes in size, services, and demand without major redesigns.

Other options explained:

A: Hierarchical design improves structure but does not guarantee scalability.

B: Modularity aids scalability but is a design approach, not the ultimate priority.

D: A dedicated core is part of hierarchical designs but not always essential for startups.

A (IaaS within a private cloud):IaaS allows on-demand scaling of compute and storage resources, and private cloud deployment reduces capital expenditures by pooling hardware resources and increasing utilization, while allowing control over security and compliance.

Other options explained:

B: On-prem IaaS still requires significant CapEx.

C: PaaS delivers platform services, but the scenario is focused on network systems.

D: SaaS on-prem is uncommon and does not address infrastructure scaling.

B (Minimize operational costs): A common business goal to reduce long-term operating expenses.

E (Reduce complexity): Simplifying designs reduces operational overhead, risk, and failure domains.

Why other options are incorrect:

A: Resiliency is a design goal, but not a business objective itself.

C: Endpoint posture is a technical security feature.

D: Faster obsolescence contradicts business optimization.