O'Reilly logo

CCDA Quick Reference Sheets: Exam 640-863 by Kevin Wallace

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

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 ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required