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Author: Paul Vincent Mockapetris Publisher: ISBN: Category : Computer networks Languages : en Pages : 198
Book Description
This report studies the problem of providing high performance communication services to computers on a local network, or other high-speed network, without sacrificing compatibility with existing communication protocols. The focus of the investigation is the network interface, the I/O controller which interfaces computers to the network medium. The network interface proposed in this report contains a novel processing element called the filter, in addition to a fairly common microprocessor. based architecture. The filter is a high-speed custom processor and a memory which holds programmable descriptions of packet formats and connection records for the protocols supported by the interface. The filter could be implemented using VLSI or a small amount of readily available bit-slice components. The filter enables the interface to process most transmissions as they arrive on the communications medium. Filter processing adds negligible delay to the overall communication path and, in most cases, replaces processing which is conventionally performed in the software of the interface microprocessor or the host. Thus, communications systems built with the new interface are limited by the speed of the medium and not by processing delays. The filter interface is shown to be practical for a 10 Mbps medium and several protocols, including the Internet Protocol (IP) and the Transmission Control Protocol(TCP). (Author).
Author: Paul Vincent Mockapetris Publisher: ISBN: Category : Computer networks Languages : en Pages : 198
Book Description
This report studies the problem of providing high performance communication services to computers on a local network, or other high-speed network, without sacrificing compatibility with existing communication protocols. The focus of the investigation is the network interface, the I/O controller which interfaces computers to the network medium. The network interface proposed in this report contains a novel processing element called the filter, in addition to a fairly common microprocessor. based architecture. The filter is a high-speed custom processor and a memory which holds programmable descriptions of packet formats and connection records for the protocols supported by the interface. The filter could be implemented using VLSI or a small amount of readily available bit-slice components. The filter enables the interface to process most transmissions as they arrive on the communications medium. Filter processing adds negligible delay to the overall communication path and, in most cases, replaces processing which is conventionally performed in the software of the interface microprocessor or the host. Thus, communications systems built with the new interface are limited by the speed of the medium and not by processing delays. The filter interface is shown to be practical for a 10 Mbps medium and several protocols, including the Internet Protocol (IP) and the Transmission Control Protocol(TCP). (Author).
Author: Joana Díaz-Pont Publisher: Palgrave Macmillan ISBN: 9783030373320 Category : Social Science Languages : en Pages : 276
Book Description
This volume interrogates the intertwining of the local and the digital in environmental communication. It starts by introducing a wave metaphor to tease out major shifts in the field, and situates the intersections of local places and digital networks in the beginning of a third wave. Investigations that feature the centrality of place and digital communication platforms show how we today, as researchers and practitioners, communicate the environment. Contributions identify the need for critical approaches that engage with the wider consequences of this changing media landscape, unpacking local and global tensions in environmental communication research. This empirical case study collection from different parts of the world shows that environmental activists and citizens creatively use digital technologies for campaign purposes. It identifies new environmental communication challenges and opportunities, as well as practices, of environmental activists, NGOs, citizens and local communities, in the fight for social and environmental justice.
Author: DIANE Publishing Company Publisher: DIANE Publishing ISBN: 0788113992 Category : Languages : en Pages : 237
Book Description
When issued by the European Comm., this Green Paper was intended to launch an active discussion amongst all interested bodies. Includes an extensive review of technological & market developments, an analysis of the European environment for future development, a review of worldwide developments, & an analysis of the extension of the principles of European Union telecomm. policy to the mobile sector. Glossary. Charts & tables.
Author: Joana Díaz-Pont Publisher: Springer Nature ISBN: 3030373304 Category : Social Science Languages : en Pages : 294
Book Description
This volume interrogates the intertwining of the local and the digital in environmental communication. It starts by introducing a wave metaphor to tease out major shifts in the field, and situates the intersections of local places and digital networks in the beginning of a third wave. Investigations that feature the centrality of place and digital communication platforms show how we today, as researchers and practitioners, communicate the environment. Contributions identify the need for critical approaches that engage with the wider consequences of this changing media landscape, unpacking local and global tensions in environmental communication research. This empirical case study collection from different parts of the world shows that environmental activists and citizens creatively use digital technologies for campaign purposes. It identifies new environmental communication challenges and opportunities, as well as practices, of environmental activists, NGOs, citizens and local communities, in the fight for social and environmental justice.
Author: Raphael Rom Publisher: Springer Science & Business Media ISBN: 1461234026 Category : Technology & Engineering Languages : en Pages : 179
Book Description
Computer communication networks have come of age. Today, there is hardly any professional, particularly in engineering, that has not been the user of such a network. This proliferation requires the thorough understanding of the behavior of networks by those who are responsible for their operation as well as by those whose task it is to design such networks. This is probably the reason for the large number of books, monographs, and articles treating relevant issues, problems, and solutions in this field. Among all computer network architectures, those based on broadcast mul tiple access channels stand out in their uniqueness. These networks appear naturally in environments requiring user mobility where the use of any fixed wiring is impossible and a wireless channel is the only available option. Because of their desirable characteristics multiple access networks are now used even in environments where a wired point-to-point network could have been installed. The understanding of the operation of multiple access network through their performance analysis is the focus of this book.
Author: Deryn M. Watson Publisher: Springer ISBN: 0387354999 Category : Education Languages : en Pages : 332
Book Description
In most schools the dominant supporting technology has been either the stand-alone personal computer or a modest local network. The situation is changing rapidly as a rising number of schools provide access to the Internet for their staff and pupils, opening avenues for communication and networking hitherto not possible. This book reflects on this change. It aims to further the vision of how these new technologies could improve and transform aspects of education. Yet in parallel it asks serious questions about the realities of an interface between the social, cultural and pedagogical contexts of education and the actual affordances that these new information and communication technologies offer. The chapters in this book provide a heady mix of foresight and practical reporting, of planning for the future but at the same time respecting the problems education already has with current technologies. The richness of the points presented here stems in part from the range of experience of the international authors - from academics and administrators, to teachers and curriculum designers. This mix ensures that the central questions on communications and networking in education are considered not simply from a variety of personal perspectives, but also from different cultural and environmental experiences. And yet interest also lies in the commonality of reporting and discussion based on activity in the field. All the contributions draw heavily on research and experience in devising and running projects and experimental activities in a range of schools and teacher-training institutions and environments. The opinions expressed are thus grounded in knowledge gained from work embedded in the reality of today's educational settings. This must be the only sound base upon which to consider the issues of the future. This book is essential reading for all professionals involved in all aspects of information and communication technologies in education. Teachers, lecturers, researchers, students and administrators will find it invaluable.
Author: Anders Hansen Publisher: Routledge ISBN: 1134521316 Category : Political Science Languages : en Pages : 455
Book Description
This Handbook provides a comprehensive statement and reference point for theory, research and practice with regard to environment and communication, and it does this from a perspective which is both international and multi-disciplinary in scope. Offering comprehensive critical reviews of the history and state of the art of research into the key dimensions of environmental communication, the chapters of this handbook together demonstrate the strengths of multi-disciplinary and cross-disciplinary approaches to understanding the centrality of communication to how the environment is constructed, and indeed contested, socially, politically and culturally. Organised in five thematic sections, The Routledge Handbook of Environment and Communication includes contributions from internationally recognised leaders in the field. The first section looks at the history and development of the discipline from a range of theoretical perspectives. Section two considers the sources, communicators and media professionals involved in producing environmental communication. Section three examines research on news, entertainment media and cultural representations of the environment. The fourth section looks at the social and political implications of environmental communication, with the final section discussing likely future trajectories for the field. The first reference Handbook to offer a state of the art comprehensive overview of the emerging field of environmental communication research, this authoritative text is a must for scholars of environmental communication across a range of disciplines, including environmental studies, media and communication studies, cultural studies and related disciplines.
Author: Paul Vincent Mockapetris
Author: Paul Vincent Mockapetris
Author: Joana Díaz-Pont
Author: DIANE Publishing Company
Author: Joana Díaz-Pont
Author: 
Author: 
Author: Raphael Rom
Author: Deryn M. Watson
Author: Disha Experts
Author: Anders Hansen