This insightful guide provides a comprehensive tour of modern network infrastructure and its importance for modern businesses, as well as a detailed set of strategies for maximizing network performance and reliability. It covers the fundamentals of network architecture, such as layer 3 routing, network segmentation, and cloud architecture; the importance of network visibility and management; cost optimization techniques; and a wide range of use cases, from cloud to hosted services. This guide enables companies to build a network infrastructure that delivers reliable performance and cost savings through enhanced visibility, reduced complexity and improved scalability.