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The Hierarchical internetworking model is a three-layer model for network design first proposed by Cisco in 1998.[1] The hierarchical design model divides enterprise networks into three layers: core, distribution, and access.
- ^ Haviland, Geoff (1998). "Designing High-Performance Campus Intranets with Multilayer Switching". Cisco Systems. Archived from the original (White Paper) on 2000-11-09. Retrieved 2023-12-16. PDF