Designing ISP Architectures

Download Designing ISP Architectures PDF Online Free

Author :
Publisher : Prentice Hall PTR
ISBN 13 :
Total Pages : 408 pages
Book Rating : 4.3/5 (91 download)

DOWNLOAD NOW!


Book Synopsis Designing ISP Architectures by : John V. Nguyen

Download or read book Designing ISP Architectures written by John V. Nguyen and published by Prentice Hall PTR. This book was released on 2002 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

The Competitive Internet Service Provider

Download The Competitive Internet Service Provider PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 0470030046
Total Pages : 398 pages
Book Rating : 4.4/5 (7 download)

DOWNLOAD NOW!


Book Synopsis The Competitive Internet Service Provider by : Oliver M. Heckmann

Download or read book The Competitive Internet Service Provider written by Oliver M. Heckmann and published by John Wiley & Sons. This book was released on 2007-03-13 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the dramatic increase in competition over the last few years, it has become more and more important for Internet Service Providers (ISPs) to run an efficient business and offer an adequate Quality of Service. The Competitive Internet Service Provider is a comprehensive guide for those seeking to do just that. Oliver Heckmann approaches the issue from a system point of view, looking not only at running a network, but also at connecting the network with peering and transit partners or planning the expansion of the network. The Competitive Internet Service Provider: Offers an advanced reference on the topic, drawing on state-of-the art research in network technology. Clearly defines the criteria enabling ISPs to operate with the greatest efficiency and deliver adequate Quality of Service. Discusses the implications of the future multiservice Internet and multimedia applications such as Voice over IP, peer-to-peer, or network games. Delivers a comparative evaluation of different feasible Quality of Service approaches. Explores scientific methods such as queuing theory, network calculus, and optimization theory. Illustrates concepts throughout with mathematical models and simulations. This invaluable reference will provide academic and industrial researchers in the field of network and communications technology, graduate students on telecommunications courses, as well as ISP managers, engineers and technicians, equipment manufacturers and consultants, with an understanding of the concepts and issues involved in running a successful ISP.

Internet Routing Architectures

Download Internet Routing Architectures PDF Online Free

Author :
Publisher : Cisco Press
ISBN 13 : 9781578702336
Total Pages : 536 pages
Book Rating : 4.7/5 (23 download)

DOWNLOAD NOW!


Book Synopsis Internet Routing Architectures by : Bassam Halabi

Download or read book Internet Routing Architectures written by Bassam Halabi and published by Cisco Press. This book was released on 2000 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores the functions, attributes, and applications of BGP-4 (Border Gateway Protocol Version 4), the de facto interdomain routing protocol, through practical scenarios and configuration examples.

Broadband Network Architectures

Download Broadband Network Architectures PDF Online Free

Author :
Publisher : Pearson Education
ISBN 13 : 013270451X
Total Pages : 623 pages
Book Rating : 4.1/5 (327 download)

DOWNLOAD NOW!


Book Synopsis Broadband Network Architectures by : Chris Hellberg

Download or read book Broadband Network Architectures written by Chris Hellberg and published by Pearson Education. This book was released on 2007-05-01 with total page 623 pages. Available in PDF, EPUB and Kindle. Book excerpt: Service providers are increasingly focused on delivering triple-play bundles that incorporate Internet, video, and VoIP services—as well as multi-play bundles containing even more advanced services. Broadband Network Architectures is the first comprehensive guide to designing, implementing, and managing the networks that make triple-play services possible. Hellberg, Greene, and Boyes present their field-tested industry best practices and objectively evaluate the tradeoffs associated with key up-front architectural decisions that balance the complexities of bundled services and sophisticated traffic policies. Broadband Network Architectures not only documents what is possible on this rapidly changing field of networking, but it also details how to divide Internet access into these more sophisticated services with specialized Quality of Service handling. Coverage includes · An in-depth introduction to next-generation triple-play services: components, integration, and business connectivity · Triple-play backbone design: MPLS, Layer 3 VPNs, and Broadband Network Gateways (BNGs)/Broadband Remote Access Servers (B-RAS) · Protocols and strategies for integrating BNGs into robust triple-play networks · Triple-play access network design: DSLAM architectures, aggregation networks, transport, and Layer 2 tunneling · VLAN-per-customer versus service-per-VLAN architectures: advantages and disadvantages · PPP or DHCP: choosing the right access protocol · Issues associated with operating in wholesale, unbundled environments · IP addressing and subscriber session management · Broadband network security, including Denial of Service attacks and VoIP privacy · The future of wireless broadband: IMS, SIP, and non-SIP based fixed mobile convergence and wireless video

Future Internet Services and Service Architectures

Download Future Internet Services and Service Architectures PDF Online Free

Author :
Publisher : River Publishers
ISBN 13 : 8792982891
Total Pages : 484 pages
Book Rating : 4.7/5 (929 download)

DOWNLOAD NOW!


Book Synopsis Future Internet Services and Service Architectures by : Dr. Anand R. Prasad

Download or read book Future Internet Services and Service Architectures written by Dr. Anand R. Prasad and published by River Publishers. This book was released on 2011-06-02 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Future Internet Services and Service Architectures presents state-of-the-art results in services and service architectures based on designs for the future Internet and related emerging networks. The discussions include technology issues, key services, business models, and security. The work describes important trends and directions. Future Internet Services and Service Architectures is intended to provide readers with a comprehensive reference for the most current developments in the field. It offers broad coverage of important topics with twenty chapters covering both technology and applications written by international experts. The 20 chapters of Future Internet Services and Service Architectures are organized into the following five sections:- Future Internet Services -- This section contains four chapters which present recent proposals for a new architecture for the Internet, with service delivery in the Future Internet as the key focus. Peer-to-Peer Services -- Using the P2P network overlay as a service platform, five chapters explore the P2P architecture and its use for streaming services, communication services, and service discovery. Virtualization -- Virtualization and its benefits for resource management, supporting hetereogeneity, and isolation are the basis for five chapters which describe virtualization at the endpoint, in the cloud, and in the network. Event-Distribution -- Publish/Subscribe mechanisms are important for applications which require time-sensitive delivery of notifications. The two chapters in this section present recent developments in publish/subscribe load balancing and in sensor networks. VANETs - Vehicular Ad Hoc Networks (VANETs) are a network technology which are designed for vehicle-to-vehicle and vehicle-to-infrastructure connectivity for moving vehicles. The four chapters in this section provide an introduction to VANETs, routing, services and system architecture . Future Internet Services and Service Architectures is complemented by a separate volume, Advances in Next Generation Services and Service Architectures, which covers emerging services and service architectures, IPTV, context awareness, and security.

Cisco ISP Essentials

Download Cisco ISP Essentials PDF Online Free

Author :
Publisher : Cisco Press
ISBN 13 : 9781587050411
Total Pages : 454 pages
Book Rating : 4.0/5 (54 download)

DOWNLOAD NOW!


Book Synopsis Cisco ISP Essentials by : Barry Raveendran Greene

Download or read book Cisco ISP Essentials written by Barry Raveendran Greene and published by Cisco Press. This book was released on 2002 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cisco® IOS software is extensive and it can often be difficult to navigate through the detailed documentation. Cisco® ISP Essentials takes those elements of IOS software that are of specific interest to ISPs and highlights many of the essential features that are in everyday use in the major ISP backbones. This book not only helps ISPs navigate this complex and detailed world to quickly gather the knowledge they require, but is also helps them harness the full feature-rich value by helping them identify and master those features that are of value to their particular area of interest and need.

Designing an Internet

Download Designing an Internet PDF Online Free

Author :
Publisher : MIT Press
ISBN 13 : 0262038609
Total Pages : 433 pages
Book Rating : 4.2/5 (62 download)

DOWNLOAD NOW!


Book Synopsis Designing an Internet by : David D. Clark

Download or read book Designing an Internet written by David D. Clark and published by MIT Press. This book was released on 2018-10-30 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: Why the Internet was designed to be the way it is, and how it could be different, now and in the future. How do you design an internet? The architecture of the current Internet is the product of basic design decisions made early in its history. What would an internet look like if it were designed, today, from the ground up? In this book, MIT computer scientist David Clark explains how the Internet is actually put together, what requirements it was designed to meet, and why different design decisions would create different internets. He does not take today's Internet as a given but tries to learn from it, and from alternative proposals for what an internet might be, in order to draw some general conclusions about network architecture. Clark discusses the history of the Internet, and how a range of potentially conflicting requirements—including longevity, security, availability, economic viability, management, and meeting the needs of society—shaped its character. He addresses both the technical aspects of the Internet and its broader social and economic contexts. He describes basic design approaches and explains, in terms accessible to nonspecialists, how networks are designed to carry out their functions. (An appendix offers a more technical discussion of network functions for readers who want the details.) He considers a range of alternative proposals for how to design an internet, examines in detail the key requirements a successful design must meet, and then imagines how to design a future internet from scratch. It's not that we should expect anyone to do this; but, perhaps, by conceiving a better future, we can push toward it.

Architecture and Design for the Future Internet

Download Architecture and Design for the Future Internet PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 904819346X
Total Pages : 322 pages
Book Rating : 4.0/5 (481 download)

DOWNLOAD NOW!


Book Synopsis Architecture and Design for the Future Internet by : Luis M. Correia

Download or read book Architecture and Design for the Future Internet written by Luis M. Correia and published by Springer Science & Business Media. This book was released on 2011-01-06 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Architecture and Design for the Future Internet addresses the Networks of the Future and the Future Internet, focusing on networks aspects, offering both technical and non-technical perspectives. It presents the main findings of 4WARD (Architecture and Design for the Future Internet), a European Integrated Project within Framework Programme 7, which addressed this area from an innovative approach. Today’s network architectures are stifling innovation, restricting it mostly to the application level, while the need for structural change is increasingly evident. The absence of adequate facilities to design, optimise and interoperate new networks currently forces a convergence to an architecture that is suboptimal for many applications and that cannot support innovations within itself, the Internet. 4WARD overcomes this impasse through a set of radical architectural approaches, built on a strong mobile and wireless background. The main topics addressed by the book are: the improved ability to design inter-operable and complementary families of network architectures; the enabled co-existence of multiple networks on common platforms through carrier-grade virtualisation for networking resources; the enhanced utility of networks by making them self-managing; the increased robustness and efficiency of networks by leveraging diversity; and the improved application support by a new information-centric paradigm in place of the old host-centric approach. These solutions embrace the full range of technologies, from fibre backbones to wireless and sensor networks.

Connecting Networks Companion Guide

Download Connecting Networks Companion Guide PDF Online Free

Author :
Publisher : Pearson Education
ISBN 13 : 1587133326
Total Pages : 569 pages
Book Rating : 4.5/5 (871 download)

DOWNLOAD NOW!


Book Synopsis Connecting Networks Companion Guide by : Cisco Networking Academy

Download or read book Connecting Networks Companion Guide written by Cisco Networking Academy and published by Pearson Education. This book was released on 2014 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This course discusses the WAN technologies and network services required by converged applications in a complex network. The course allows you to understand the selection criteria of network devices and WAN technologies to meet network requirements. You will learn how to configure and troubleshoot network devices and resolve common issues with data link protocols. You will also develop the knowledge and skills needed to implement IPSec and virtual private network (VPN) operations in a complex network."--Back cover.

Internet Architectures

Download Internet Architectures PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 :
Total Pages : 552 pages
Book Rating : 4.3/5 (91 download)

DOWNLOAD NOW!


Book Synopsis Internet Architectures by : Daniel Minoli

Download or read book Internet Architectures written by Daniel Minoli and published by John Wiley & Sons. This book was released on 1999 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: The anatomy of the Internet: how it's structured, what makes it work, who controls it, and how to support internetworking capabilities in your organization If you work in any aspect of internetworking planning, design, development, or management, you need to have as complete a picture as possible of how the Internet is structured and what makes it work. Internet Architectures explains Internet components and the technical relationships between them, names the key players involved and the agreements currently in place between them, reveals proprietary architectures, and arms you with a wealth of practical information on: * Backbone technologies, including packet over SONET * Protocols and a description of ISP network architectures * Servers, routers, and software * Communications infrastructures * Access technology, including xDSL, ADSL, FITL, and frame relay * QoS and its support technologies, including ATM, RSVP, IPv6 * Policy, regulation, peering, and reciprocity arrangements * Multimedia and supporting technology * Internetworking security

SCION: A Secure Internet Architecture

Download SCION: A Secure Internet Architecture PDF Online Free

Author :
Publisher : Springer
ISBN 13 : 9783319883748
Total Pages : 0 pages
Book Rating : 4.8/5 (837 download)

DOWNLOAD NOW!


Book Synopsis SCION: A Secure Internet Architecture by : Adrian Perrig

Download or read book SCION: A Secure Internet Architecture written by Adrian Perrig and published by Springer. This book was released on 2018-08-25 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the essential components of the SCION secure Internet architecture, the first architecture designed foremost for strong security and high availability. Among its core features, SCION also provides route control, explicit trust information, multipath communication, scalable quality-of-service guarantees, and efficient forwarding. The book includes functional specifications of the network elements, communication protocols among these elements, data structures, and configuration files. In particular, the book offers a specification of a working prototype. The authors provide a comprehensive description of the main design features for achieving a secure Internet architecture. They facilitate the reader throughout, structuring the book so that the technical detail gradually increases, and supporting the text with a glossary, an index, a list of abbreviations, answers to frequently asked questions, and special highlighting for examples and for sections that explain important research, engineering, and deployment features. The book is suitable for researchers, practitioners, and graduate students who are interested in network security.

The Real Internet Architecture

Download The Real Internet Architecture PDF Online Free

Author :
Publisher : Princeton University Press
ISBN 13 : 0691261857
Total Pages : 256 pages
Book Rating : 4.6/5 (912 download)

DOWNLOAD NOW!


Book Synopsis The Real Internet Architecture by : Pamela Zave

Download or read book The Real Internet Architecture written by Pamela Zave and published by Princeton University Press. This book was released on 2024-06-25 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new way to understand the architecture of today’s Internet, based on an innovative general model of network architecture that is rigorous, realistic, and modular This book meets the long-standing need for an explanation of how the Internet's architecture has evolved since its creation to support an ever-broader range of the world's communication needs. The authors introduce a new model of network architecture that exploits a powerful form of modularity to provide lucid, insightful descriptions of complex structures, functions, and behaviors in today’s Internet. Countering the idea that the Internet’s architecture is “ossified” or rigid, this model—which is presented through hundreds of examples rather than mathematical notation—encompasses the Internet’s original or “classic” architecture, its current architecture, and its possible future architectures. For practitioners, the book offers a precise and realistic approach to comparing design alternatives and guiding the ongoing evolution of their applications, technologies, and security practices. For educators and students, the book presents patterns that recur in many variations and in many places in the Internet ecosystem. Each pattern tells a compelling story, with a common problem to be solved and a range of solutions for solving it. For researchers, the book suggests many directions for future research that exploit modularity to simplify, optimize, and verify network implementations without loss of functionality or flexibility.

Designing Cisco Network Service Architectures (ARCH)

Download Designing Cisco Network Service Architectures (ARCH) PDF Online Free

Author :
Publisher : Cisco Press
ISBN 13 : 1587142880
Total Pages : 735 pages
Book Rating : 4.5/5 (871 download)

DOWNLOAD NOW!


Book Synopsis Designing Cisco Network Service Architectures (ARCH) by : John Tiso

Download or read book Designing Cisco Network Service Architectures (ARCH) written by John Tiso and published by Cisco Press. This book was released on 2012 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designing Cisco Network Service Architectures (ARCH) Foundation Learning Guide, Third Edition, is a Cisco(R)-authorized, self-paced learning tool for CCDP(R) foundation learning. This book provides you with the knowledge needed to perform the conceptual, intermediate, and detailed design of a network infrastructure that supports desired network solutions over intelligent network services, in order to achieve effective performance, scalability, and availability. By reading this book, you will gain a thorough understanding of how to apply solid Cisco network solution models and recommended design practices to provide viable, stable enterprise internetworking solutions. The book presents concepts and examples that are necessary to design converged enterprise networks. Advanced network infrastructure technologies, such as virtual private networks (VPNs) and other security solutions are also covered. Designing Cisco Network Service Architectures (ARCH) Foundation Learning Guide, Third Edition teaches you the latest development in network design and technologies, including network infrastructure, intelligent network services, and converged network solutions. Specific topics include campus, routing, addressing, WAN services, data center, e-commerce, SAN, security, VPN, and IP multicast design, as well as network management. Chapter-ending review questions illustrate and help solidify the concepts presented in the book. Whether you are preparing for CCDP certification or simply want to gain a better understanding of designing scalable and reliable network architectures, you will benefit from the foundation information presented in this book. Designing Cisco Network Service Architectures (ARCH) Foundation Learning Guide, Third Edition, is part of a recommended learning path from Cisco that includes simulation and hands-on training from authorized Cisco Learning Partners and self-study products from Cisco Press. To find out more about instructor-led training, e-learning, and hands-on instruction offered by authorized Cisco Learning Partners worldwide, please visit www.cisco.com/go/authorizedtraining. John Tiso, CCIE No. 5162, CCDP is a Product Manager for Cisco Systems. He holds a B.S. Degree in Computer Science and Mathematics from Adelphi University and a Graduate Citation in Strategic Management from Harvard University. John is a published author, has served as a technical editor for Cisco Press, and has participated as a SME for the CCIE program. Prior to Cisco, he was a senior consultant and architect in the Cisco partner channel. - Learn about the Cisco Enterprise Architecture - Create highly available campus and data center network designs - Develop optimum Layer 3 designs - Examine advanced WAN services design considerations - Evaluate SAN design considerations - Deploy effective e-commerce module designs - Create effective security services and IPsec and SSL VPN designs - Design IP multicast networks - Understand the network management capabilities within Cisco IOS Software This book is in the Foundation Learning Guide Series. These guides are developed together with Cisco(R) as the only authorized, self-paced learning tools that help networking professionals build their understanding of networking concepts and prepare for Cisco certification exams. Category: Cisco Certification Covers: CCDP ARCH 642-874

Design Innovation and Network Architecture for the Future Internet

Download Design Innovation and Network Architecture for the Future Internet PDF Online Free

Author :
Publisher : IGI Global
ISBN 13 : 1799876470
Total Pages : 478 pages
Book Rating : 4.7/5 (998 download)

DOWNLOAD NOW!


Book Synopsis Design Innovation and Network Architecture for the Future Internet by : Boucadair, Mohamed

Download or read book Design Innovation and Network Architecture for the Future Internet written by Boucadair, Mohamed and published by IGI Global. This book was released on 2021-04-16 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the past couple of years, network automation techniques that include software-defined networking (SDN) and dynamic resource allocation schemes have been the subject of a significant research and development effort. Likewise, network functions virtualization (NFV) and the foreseeable usage of a set of artificial intelligence techniques to facilitate the processing of customers’ requirements and the subsequent design, delivery, and operation of the corresponding services are very likely to dramatically distort the conception and the management of networking infrastructures. Some of these techniques are being specified within standards developing organizations while others remain perceived as a “buzz” without any concrete deployment plans disclosed by service providers. An in-depth understanding and analysis of these approaches should be conducted to help internet players in making appropriate design choices that would meet their requirements as well as their customers. This is an important area of research as these new developments and approaches will inevitably reshape the internet and the future of technology. Design Innovation and Network Architecture for the Future Internet sheds light on the foreseeable yet dramatic evolution of internet design principles and offers a comprehensive overview on the recent advances in networking techniques that are likely to shape the future internet. The chapters provide a rigorous in-depth analysis of the promises, pitfalls, and other challenges raised by these initiatives, while avoiding any speculation on their expected outcomes and technical benefits. This book covers essential topics such as content delivery networks, network functions virtualization, security, cloud computing, automation, and more. This book will be useful for network engineers, software designers, computer networking professionals, practitioners, researchers, academicians, and students looking for a comprehensive research book on the latest advancements in internet design principles and networking techniques.

Internet Routing Architectures

Download Internet Routing Architectures PDF Online Free

Author :
Publisher : MacMillan Technical Publishing
ISBN 13 :
Total Pages : 516 pages
Book Rating : 4.3/5 (91 download)

DOWNLOAD NOW!


Book Synopsis Internet Routing Architectures by : Bassam Halabi

Download or read book Internet Routing Architectures written by Bassam Halabi and published by MacMillan Technical Publishing. This book was released on 1997 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: This complete resource provides "how to" information, rather than just theory on internetworking design alternatives and solutions. The book's focus is interdomain routing and associated protocols.

SCION: A Secure Internet Architecture

Download SCION: A Secure Internet Architecture PDF Online Free

Author :
Publisher : Springer
ISBN 13 : 3319670808
Total Pages : 438 pages
Book Rating : 4.3/5 (196 download)

DOWNLOAD NOW!


Book Synopsis SCION: A Secure Internet Architecture by : Adrian Perrig

Download or read book SCION: A Secure Internet Architecture written by Adrian Perrig and published by Springer. This book was released on 2017-10-13 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the essential components of the SCION secure Internet architecture, the first architecture designed foremost for strong security and high availability. Among its core features, SCION also provides route control, explicit trust information, multipath communication, scalable quality-of-service guarantees, and efficient forwarding. The book includes functional specifications of the network elements, communication protocols among these elements, data structures, and configuration files. In particular, the book offers a specification of a working prototype. The authors provide a comprehensive description of the main design features for achieving a secure Internet architecture. They facilitate the reader throughout, structuring the book so that the technical detail gradually increases, and supporting the text with a glossary, an index, a list of abbreviations, answers to frequently asked questions, and special highlighting for examples and for sections that explain important research, engineering, and deployment features. The book is suitable for researchers, practitioners, and graduate students who are interested in network security.

Internet Architecture and Innovation

Download Internet Architecture and Innovation PDF Online Free

Author :
Publisher : MIT Press
ISBN 13 : 0262265575
Total Pages : 587 pages
Book Rating : 4.2/5 (622 download)

DOWNLOAD NOW!


Book Synopsis Internet Architecture and Innovation by : Barbara Van Schewick

Download or read book Internet Architecture and Innovation written by Barbara Van Schewick and published by MIT Press. This book was released on 2012-08-24 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed examination of how the underlying technical structure of the Internet affects the economic environment for innovation and the implications for public policy. Today—following housing bubbles, bank collapses, and high unemployment—the Internet remains the most reliable mechanism for fostering innovation and creating new wealth. The Internet's remarkable growth has been fueled by innovation. In this pathbreaking book, Barbara van Schewick argues that this explosion of innovation is not an accident, but a consequence of the Internet's architecture—a consequence of technical choices regarding the Internet's inner structure that were made early in its history. The Internet's original architecture was based on four design principles: modularity, layering, and two versions of the celebrated but often misunderstood end-to-end arguments. But today, the Internet's architecture is changing in ways that deviate from the Internet's original design principles, removing the features that have fostered innovation and threatening the Internet's ability to spur economic growth, to improve democratic discourse, and to provide a decentralized environment for social and cultural interaction in which anyone can participate. If no one intervenes, network providers' interests will drive networks further away from the original design principles. If the Internet's value for society is to be preserved, van Schewick argues, policymakers will have to intervene and protect the features that were at the core of the Internet's success.