Previously we've looked into network topologies and learned what types of it exist. As it has already been stated, network topology is the arrangement of a network, including its nodes and connecting lines. But there's an explicit distinction between arrangement and architecture. Following article, excerpted from the book "Art of Network Architecture, The: Business-Driven Design"  and consistent of 4 sections, profoundly explains Architectural Methodology, Hierarchical Design Patterns, Virtualization and Modulartiy. 

The Art of Network Architecture: Applying Modularity