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350-401 · Question #867

Which of the following are the three components of the three-tier hierarchical networking model used in the classical Cisco networks design? (Choose three.)

The correct answer is A. Distribution B. Core C. Access. The classical Cisco three-tier hierarchical networking model is composed of the Access, Distribution, and Core layers, each performing distinct roles in network design.

Submitted by anna_se· Mar 6, 2026Architecture

Question

Which of the following are the three components of the three-tier hierarchical networking model used in the classical Cisco networks design? (Choose three.)

Options

  • ADistribution
  • BCore
  • CAccess
  • DLeaf
  • ESpine

How the community answered

(58 responses)
  • A
    86% (50)
  • D
    10% (6)
  • E
    3% (2)

Why each option

The classical Cisco three-tier hierarchical networking model is composed of the Access, Distribution, and Core layers, each performing distinct roles in network design.

ADistributionCorrect

The Distribution layer aggregates traffic from the Access layer, provides policy-based connectivity, and handles routing and QoS between the Access and Core layers.

BCoreCorrect

The Core layer functions as the high-speed backbone, providing fault-tolerant, efficient packet forwarding across the network.

CAccessCorrect

The Access layer is responsible for providing network access to end devices such as workstations and servers, implementing local network segmentation and security.

DLeaf

Leaf is a component of the modern two-tier Spine-Leaf architecture, not the classical three-tier model.

ESpine

Spine is a component of the modern two-tier Spine-Leaf architecture, not the classical three-tier model.

Concept tested: Classical three-tier network design layers

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

Topics

#hierarchical model#three-tier#campus design#distribution layer

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