Architectural decisions are crucial to the success of any ISP, because they will determine the cost-effectiveness, flexibility, and scalability of the infrastructure used to deliver services. Designing ISP Architectures is a start-to-finish best-practices guide to effective ISP architectural design and implementation. Leading ISP architect and consultant John V. Nguyen uses a running case study to cover every step of the process: formulating design requirements; establishing an architectural model; creating and documenting both logical and physical designs; selecting components; and implementing the architecture you've defined. Nguyen demonstrates how to create platform-independent architectures that can support rapid growth in subscribership, ongoing new product introductions, low-cost operation, and effective management. Along the way, he identifies key tradeoffs and limitations, offering practical guidance architects can use to optimize ISP infrastructure for any marketplace or application portfolio. For every IT architect, consultant, and network professional responsible for designing or implementing ISP architectures.