Chapter 2. Modular Network Design
For many years, Cisco recommended a three-layer network design model: access layer, distribution layer, and core layer. However, to provide for enhanced scalability and flexibility, Cisco later introduced the Cisco Enterprise Architecture, which categorizes enterprise networks into six modules. The three layers of the Cisco Service-Oriented Network Architecture (SONA) can be found in each of these six modules. Specifically, each module can contain its own network infrastructure, services, and applications. This section explores the design considerations surrounding the modules that comprise the Cisco Enterprise Architecture.
Designing the Network Hierarchy
Traditionally, Cisco prescribed a three-layer model for ...
Get CCDA Quick Reference Sheets: Exam 640-863 now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
