200-301 Question #421: Real Exam Question with Answer & Explanation

Question

When should an engineer implement a collapsed-core architecture?

Options

• Afor small networks with minimal need for growth
• Bthe access and distribution layers must be on the same device
• Cfor large networks that are connected to multiple remote sites
• Donly when using VSS technology

Explanation

A collapsed-core architecture is typically implemented in smaller networks where the distribution and core layers are combined into a single device or a pair of redundant devices, reducing complexity and cost while still providing high performance. This design is suitable for networks with limited growth requirements.

Common mistakes.

• B. While the access and distribution layers can be on the same device in a collapsed core for very small scenarios, the core concept of a collapsed core combines the distribution and core layers, not necessarily access and distribution.
• C. For large networks connected to multiple remote sites, a traditional three-tier hierarchical design (access, distribution, core) is generally preferred for scalability, fault tolerance, and modularity.
• D. VSS (Virtual Switching System) is a technology that can be used within a collapsed core for redundancy and simplified management, but it's not the only condition for implementing a collapsed core.

Concept tested. Network design architectures (collapsed core)

Reference. https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Campus/campover.html

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