Book excerpt: This book will give you a High Level of overview of the Service Provider Network Design and Architecture. It talks about the unique aspects of Service Provider networks, different types of Service Providers and the business relationships between them. It covers the Service Providers services, different last mile access offerings and transport networks, and their subscribers and services.Technical explanation about different types of Fixed and Mobile network services and the Service Provider physical locations are also explained. You will see the Big Picture of Service Provider Networks.After understanding the Service Provider Concepts and Technologies, a fictitious National Service Provider network, named ATELCO will be introduced, to give you a more view of the technologies, protocols, services and end to end traffic flow in great detail. And at last the Evolving Technologies used in Service Providers and Massively Scale Datacenters will be seen.