Which network architecture uses access, distribution, and core layers?

Question

BlackTom AI · Accepted Answer

The three-layer hierarchical model organizes network functions into access, distribution, and core layers, which immediately identifies the correct architecture.

1. Relevant knowledge points and concepts
- Hierarchical network design (commonly used in enterprise/Campus LANs) divides network responsibilities into access, distribution, and core layers.
- Access layer: connects end devices (PCs, printers, wireless APs) and enforces port-level policies.
- Distribution layer: aggregates access switches, implements routing/policy, filtering, QoS, and redundancy.
- Core layer: high-speed backbone that routes traffic quickly between distribution blocks and to the data center or internet.

2. Complete reasoning process step by step
- The question asks which architecture uses access, distribution, and core layers.
- Compare known models: the hierarchical model explicitly names those three layers.
- Other listed topologies (flat, ring-only, bus) do not use that three-layer naming or functional separation.

3. Intermediate steps (classification)
- Option “Hierarchical architecture”: by definition comprises access, distribution, core.
- Option “Unstructured flat cabling”: implies no layering—single layer, not access/distribution/core.
- “Ring-only topology” and “Bus topology”: describe physical topologies, not layered architectural roles.

4. Why the correct answer is correct
- Hierarchical architecture is explicitly constructed with access/distribution/core layers to provide scalability, manageability, and performance separation of concerns—exactly matching the three-layer terms used in the question.

5. Why other options are incorrect
- Unstructured flat cabling: lacks hierarchical layers and central aggregation—contradicts the presence of access/distribution/core.
- Ring-only topology: a physical topology where devices form a closed loop; does not define separate logical layers.
- Bus topology: single shared medium; again a physical layout without distinct access/distribution/core layers.

6. Conclusion confirming the final answer
Therefore, the correct choice is Hierarchical architecture, which matches the provided answer.

Which network architecture uses access, distribution, and core layers?单项选择题

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