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Difficulty: EasyNetwork Topology Architectures

Match each network topology architectural layer to its primary functional responsibility within an enterprise campus or data center network.

  • Campus Core LayerProvides high-speed, non-blocking packet transport across the backbone without performing CPU-intensive packet inspection.
  • Campus Access LayerProvides direct network connectivity and edge policy enforcement for end-user endpoint devices.
  • Data Center Spine LayerInterconnects all leaf switches to form an Equal-Cost Multi-Path (ECMP) routing matrix without connecting directly to end hosts.
  • Data Center Leaf LayerDirectly connects servers and storage systems while maintaining uplink connections to every spine switch in the Clos topology.

Answer

Campus Core Layer matches high-speed non-blocking backbone transport. Campus Access Layer matches direct end-user endpoint connectivity and edge policy enforcement. Data Center Spine Layer matches interconnecting all leaf switches via ECMP routing without host connections. Data Center Leaf Layer matches directly connecting servers and storage while linking to every spine switch.
Each functional layer serves a distinct architectural purpose: the Campus Core provides rapid backbone transit; the Campus Access layer connects user devices and enforces edge policies; the Data Center Spine interconnects leaf switches via ECMP without host attachments; and the Data Center Leaf connects endpoints while maintaining links to every spine.

Step-by-Step Solution

1
Identify the role of the Campus Core Layer in a 3-Tier model.
Match with high-speed packet transport without CPU-intensive filtering.
The core layer must maintain maximum packet throughput across the campus core network.
2
Identify the role of the Campus Access Layer.
Match with direct connectivity and security enforcement for user endpoints.
Access switches form the network edge where workstations and IP phones plug into the network.
3
Differentiate between Spine and Leaf layers in a Clos data center topology.
Spine switches interconnect leaf switches via ECMP, while Leaf switches connect hosts and link to all spines.
Spine switches form the core interconnect fabric without host attachment, whereas leaf switches act as access nodes for servers.

Key Concept

Campus 3-Tier and Data Center Spine-Leaf Layer Responsibilities
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Topics

Network Topology Architectures

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