Episode 71: Three-Tiered Architecture — Core, Distribution, and Access

This episode introduces the three-tiered network architecture model, which organizes devices into core, distribution, and access layers. The core provides fast, high-capacity forwarding between distribution layers, the distribution layer manages routing, filtering, and policy enforcement, and the access layer connects end devices to the network. This hierarchy is a key exam topic because it demonstrates how scalability, manageability, and performance are achieved in structured designs.

The discussion expands with practical examples. A campus network may have a redundant core for reliability, distribution switches to segment departments, and access switches to connect workstations and printers. Troubleshooting scenarios include identifying bottlenecks at the access layer or misapplied access control lists at the distribution layer. Understanding this model ensures you can interpret design questions on the exam and apply layered principles in enterprise networks. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your certification path.