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"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 modularThis 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"-- "This book offers a description of the architecture of the Internet as it actually exists now. It is a revolutionary description, based on a completely new model of network architecture, explaining how the Internet has evolved from its origins and how it is still evolving, and exposing previously unarticulated patterns and trends in network architecture. Essentially all discussion of the Internet is still dominated by the "classic" (five-layer) model put forth by its originators. This model is so outdated that it is a hindrance to understanding Internet evolution, as well as to teaching and doing effective research on networking. This book replaces it with a new model of networking called "compositional network architecture." This model has been formalized, but the book does not use the formal model; rather, the book relies on the model's accuracy and precision as a foundation for a convincing informal explanation, accessible to a much broader audience than a formal model would be (the formal model will be available on a companion website, along with teaching material). Many scholars and practitioners, seeing the Internet only through the lens of the classic Internet architecture, complain that the Internet has not evolved past its original architecture. Compositional network architecture is a general model for describing many architectures, and it shows clearly how the Internet has evolved since the early 1990s, and how it continues to evolve. Though the book is based on a conceptual model and is therefore a relatively abstract treatment, it is illustrated with hundreds of contemporary Internet examples, so there is no lack of concrete detail or grounding in reality. Compared to older works on networking, the book is also more concerned with network services-how a network helps users communicate. This is a natural outgrowth of the Internet as subject matter. Performance and scalability are the usual themes of Internet literature, as they were certainly the most important challenges of the Internet's early years. Since the 1990s, however, progress on performance and scalability has been steady and incremental. The major motivation for Internet evolution since then has been the need for enhanced services, including mobility, multicast, security, privacy, reliability, and support for content distribution, and the book will engage with these themes. It will serve as a reference for anyone dealing with internet architecture, and as a graduate textbook for networking courses"--

Internet. --- Computer network architectures. --- COMPUTERS / Computer Architecture --- COMPUTERS / Internet / General

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"An electrifying vision of how we can safeguard AI's future for the public good. Artificial intelligence may be the most transformative technology of our time. As AI's power grows, so does the need to figure out what-and who-this technology is really for. AI Needs You argues that it is critical for society to take the lead in answering this urgent question and ensuring that AI fulfills its promise.Verity Harding draws inspiring lessons from the histories of three twentieth-century tech revolutions-the space race, in-vitro fertilization, and the internet-to empower each of us to join the conversation about AI and its possible futures. Sharing her perspective as a leading insider in technology and politics, she rejects the dominant narrative, which often likens AI's advent to that of the atomic bomb. History points the way to an achievable future in which democratically determined values guide AI to be peaceful in its intent; to embrace limitations; serve purpose, not profit; and to be firmly rooted in societal trust. AI Needs You gives us hope that we, the people, can imbue AI with a deep intentionality that reflects our best values, ideals, and interests, and that serves the public good. AI will permeate our lives in unforeseeable ways, but it is clear that the shape of AI's future-and of our own-cannot be left only to those building it. It is up to us to guide this technology away from our worst fears toward a future that we can trust and believe in"--

Technological innovations --- Technology and civilization. --- Technology and state. --- Artificial intelligence --- COMPUTERS / Artificial Intelligence / General --- COMPUTERS / Internet / General --- Social aspects. --- TECHNOLOGICAL INNOVATIONS--SOCIAL ASPECTS --- TECHNOLOGY AND STATE --- ARTIFICIAL INTELLIGENCE--SOCIAL ASPECTS --- INNOVATIONS

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Benedetta Brevini investigates the extent to which a Public Service Broadcasting (PSB) ethos has been extended to the online world in Europe. She examines the most significant policy initiatives carried out by PSBs in Europe on online platforms, and analyzes how the public service philosophy is being reinvented by policy makers (at both the national and European level), by PSB institutions and by their competitors. Brevini examines Denmark, France, Italy, Spain and the UK, where PSB has been the subject of landmark reforms that have changed its legal and policy frameworks. Concurrently, at the European level, the debate about the redefinition and expansion of PSB in the new media has been vigorous. As such, Brevini elaborates on and discusses a normative democratic framework for PSB online in Europe named 'PSB 2.0'. She argues that, if the online world is to be infused with the same public service ethos which characterizes traditional broadcasting, European policy makers and institutions need to understand that a reconfiguration of public service values and principles in.Bron : http://www.amazon.com

Telecommunication services --- Europe --- Public broadcasting --- Internet television --- Broadcasting policy --- Television --- Social aspects --- Openbare omroep --- EU --- Mediabeleid --- Internet --- Journalistieke ethiek --- Computers --- Social science --- General. --- Social Aspects --- Media Studies. --- #SBIB:309H1012 --- #SBIB:309H1713 --- COMPUTERS / Internet / General. --- COMPUTERS / Social Aspects / General. --- SOCIAL SCIENCE / Media Studies. --- 316.77 <4> --- Radio vision --- TV --- Artificial satellites in telecommunication --- Electronic systems --- Optoelectronic devices --- Telecommunication --- Astronautics --- Broadcasting --- Broadcasting and state --- Mass media policy --- Internet TV --- Net television --- Net TV --- Web television --- Web TV --- Webcasting --- Non-commercial broadcasting --- Noncommercial broadcasting --- Media: communicatiepolitieke aspecten / mediabeleid (nationaal en internationaal) --- Mediatechnologie: nieuwe toepassingen (abonnee-televisie, electronic mail, desk top publishing, virtuele realiteit...) --- Communicatiesociologie--Europa --- Optical communication systems --- Government policy --- 316.77 <4> Communicatiesociologie--Europa --- COMPUTERS / Internet / General --- COMPUTERS / Social Aspects / General --- SOCIAL SCIENCE / Media Studies --- Europese Unie --- Public broadcasting - Europe --- Internet television - Europe --- Broadcasting policy - Europe --- Television - Social aspects - Europe