Сетевые технологии / Компьютеры и сети

Электронный справочник содержит сведения по всем видам компьютерных сетей, о их особенностях и физических свойствах, о протоколах, используемых в сетях, о методах передачи данных, взаимодействии компьютеров в сети и взаимном использовании их ресурсов, способах адресации, согласовании сигналов при установке связи, о мерах по повышению надежности передачи данных, об обработке ошибок и много другой информации.Справочник предназначен для системных администраторов и программистов, разрабатывающих сетевые приложения.Справочник будет также полезен тем, кто хочет разобраться в технологии обработки информации в сетях.

В справочнике собраны советы и полезная информация, связанные с интернет-технологиями. Даны материалы, связанные с Интернет: поиск, браузеры, общение и т.д.

Cyber Terrorism: Political and Economic Implications is a cyber terrorism brief that outlines many of the recent terrorist activities, political objectives, and their use of cyberspace. Much of this book is dedicated to illustrating the use of the global information infrastructure by terrorists for the communication and coordination of distributed terrorist cells, the gathering of target intelligence, and the use of cyber criminal activities as a force multiplier for both physical attacks and infrastructure destabilization. This book identifies the underlying technologies of the global information infrastructure as a means for presenting how critical this emerging domain has become. It then discusses the current attack methods and lays out a series of scenarios for key industry sectors. Lastly, Cyber Terrorism: Political and Economic Implications puts forward prevention and response policies for reducing cyber terrorism activities in the context of traditional information security objectives.

Product Description: Foreword from Arogyaswami Paulraj, Professor (Emeritus), Stanford University (USA) * The first book to show how MIMO principles can be implemented in today's mobile broadband networks and components * Explains and solves some of the practical difficulties that arise in designing and implementing MIMO systems. * Both theory and implementation sections are written in the context of the most recent standards: IEEE 802.11n (WiFi); IEEE 802.16 (WIMAX); 4G networks (3GPP/3GPP2, LTE).

Электронный справочник «Всё о сетях» содержит сведения по всем видам компьютерных сетей, о их особенностях и физических свойствах, о протоколах, используемых в сетях, о методах передачи данных, взаимодействии компьютеров в сети и взаимном использовании их ресурсов, способах адресации, согласовании сигналов при установке связи, о мерах по повышению надежности передачи данных, об обработке ошибок и много другой информации.

Справочник предназначен для системных администраторов и программистов, разрабатывающих сетевые приложения.Справочник будет также полезен тем, кто хочет разобраться в технологии обработки информации в сетях.

The configuration guide for Asterisk PBX is a self-training material for the Digium's award winning open source software. With 370 pages and 15 chapters is one the most complete guides for open source IP telephony. It is now ready for the version 1.4.

IMS Multimedia Telephony service has been standardized in 3GPP as the replacement of the circuit switched telephony service in cellular networks. The multimedia telephony service consists of several service components such as voice, video and text. ?IMS Multimedia Telephony over Cellular Systems? provides a comprehensive overview of the service that will enable enriched telephony for mobile users. Enriched telephony fulfils the user?s desire to communicate in new ways, for example by sharing pictures and video clips.

In addition to an overview of the Multimedia Telephony service, the book focuses on the modern media processing methods, which allows the quality of the packet switched voice and video telephony not only to match but also possibly exceed the quality of circuit switched telephony. Such key components as adaptive jitter buffering and adaptation of conversational media are explained in detail.

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All you need to know about deploying VoIP protocols in one comprehensive and highly practical reference - Now updated with coverage on SIP and the IMS infrastructure This book provides a comprehensive and practical overview of the technology behind Internet Telephony (IP), providing essential information to Network Engineers, Designers, and Managers who need to understand the protocols. Furthermore, the author explores the issues involved in the migration of existing telephony infrastructure to an IP - based real time communication service. Assuming a working knowledge of IP and networking, it addresses the technical aspects of real-time applications over IP. Drawing on his extensive research and practical development experience in VoIP from its earliest stages, the author provides an accessible reference to all the relevant standards and cutting-edge techniques in a single resource. Key Features: * Updated with a chapter on SIP and the IMS infrastructure * Covers ALL the major VoIP protocols – SIP, H323 and MGCP * Includes a large section on practical deployment issues gleaned from the authors’ own experience * Chapter on the rationale for IP telephony and description of the technical and business drivers for transitioning to all IP networks This book will be a valuable guide for professional network engineers, designers and managers, decision makers and project managers overseeing VoIP implementations, market analysts, and consultants. Advanced undergraduate and graduate students undertaking data/voice/multimedia communications courses will also find this book of interest. Olivier Hersent founded NetCentrex, a leading provider of VoIP infrastructure for service providers, then became CTO of Comverse after the acquisition of NetCentrex. He now manages Actility, provider of IMS based M2M and smartgrid infrastructure and applications.

Product Description: MIMO-OFDM for LTE, WIFI and WIMAX: Coherent versus Non-Coherent and Cooperative Turbo-Transceivers provides an up-to-date portrayal of wireless transmission based on OFDM techniques augmented with Space-Time Block Codes (STBCs) and Spatial-Division Multiple Access (SDMA). The volume also offers an in-depth treatment of cutting-edge Cooperative Communications. This monograph collates the latest techniques in a number of specific design areas of turbo-detected MIMO-OFDM wireless systems. As a result a wide range of topical subjects are examined, including channel coding and multiuser detection (MUD), with a special emphasis on optimum maximum-likelihood (ML) MUDs, reduced-complexity genetic algorithm aided near-ML MUDs and sphere detection. The benefits of spreading codes as well as joint iterative channel and data estimation are only a few of the radical new features of the book. Also considered are the benefits of turbo and LDPC channel coding, the entire suite of known joint coding and modulation schemes, space-time coding as well as SDM/SDMA MIMOs within the context of various application examples. The book systematically converts the lessons of Shannon's information theory into design principles applicable to practical wireless systems; the depth of discussions increases towards the end of the book. * Discusses many state-of-the-art topics important to today's wireless communications engineers. * Includes numerous complete system design examples for the industrial practitioner. * Offers a detailed portrayal of sphere detection. * Based on over twenty years of research into OFDM in the context of various applications, subsequently presenting comprehensive bibliographies.