Gilbert Held – författare

Now that the market drivers for a wireless LAN breakthrough are in place - new standards, new products and emerging broadband markets - network managers need to know how to operate them and what equipment and access to purchase. This is a practical guide to deploying networks.

Network manager’s practical introduction to optical networking

With cheaper bandwidth and greater robustness, optical networking components are looking increasingly tempting—perhaps even mandatory for maintaining your network’s competitiveness. In Deploying Optical Networking Components, veteran communications consultant Gil Held utilizes language and terms already familiar to network managers -- without overwhelming you with optical science -- to help you:

* Understand the role of LEDs, lasers, single mode and multimode optical fiber and couplers and amplifiers* Bridge the divide between conventional systems and optical upgrades* Relate optical technologies to existing networks* Evaluate optical components in the context of your existing infrastructure* Apply practical integration and migration techniques in LANs, WANs, and other infrastructure* Familiarize yourself with technical changes in performance measurement, system management, switching technology, support requirements, and other key challenges

Enhancing LAN Performance, Fourth Edition explains how to connect geographically separated LANs with appropriate bandwidth, the issues to consider when weighing the use of multiport or dualport devices, how to estimate traffic for new networks, the effects of configuration changes on the performance of Ethernet and Token Ring networks, the design o

The authors of Practical Network Design Techniques, Second Edition: A Complete Guide for WANs and LANs build upon the popular first edition by combining pre-existing network design fundamentals with new material on LAN devices and topologies, wireless local networks, and LAN internetworking issues.This new edition has two parts. The first p

Sales of IEEE 802.11x compliant wireless LANs are exploding. Unfortunately the manuals accompanying the equipment do not address topics such as site selection, equipment interoperability with products from other vendors, and how to acquire and configure the different firewall, network address translation, and router software necessary when connecting to the Internet. Building a Wireless Office is a how-to guide that explains technical issues in non-technical terms. Written for a wide audience, it teaches how wireless LANs operate, the difference between available and emerging products, and why wireless LANs that operate at higher data rates may not be suitable or cost effective for all organizations.

Recent improvements in LED technology have made them as ubiquitous as cell phones. In fact, LEDs light up almost all cell phones screens. The technology’s myriad applications and low energy use have made it nearly impossible to get through daily chores without coming in contact with LEDs. Probable advances include increased ability of the technology to support more efficient lighting and enhanced communications. With balanced coverage of the basics and future developments, Introduction to Light Emitting Diode Technology and Applications takes you on a tour of the LED evolution. The book begins with a brief history of the effort to enable the device that generates light through modern organic LEDs and reviews the fundamentals and principles of light prior to a detailed explanation of how LEDs generate different colors. After forming this basic foundation, the book examines the key LEDs in lighting and communications. It then discusses the latest opportunities and advancements in high brightness (HB) LED technology, solid state lighting, and handheld electronic applications.As we approach a new decade the role of LEDs is literally set to explode, with organic light emitting diodes emerging as a leading next generation technology for electronic displays and lighting. Challenges still exist, including light extraction, luminosity, and white light generation, not to mention non-technical obstacles such as IP disputes and the lack of standards. This book provides a foundation for resolving these issues and developing new applications for LEDs in the promising general illumination market.

The PC revolution, the advent of PDAs, and growth in the use of wireless LANs have changed the way we live our lives. Next on the horizon is the application of new technologies that will change the way we drive our cars. De rigeur for many drivers, electronic passes and GPS systems represent the tip of the iceberg in terms of emerging applications of new technology. Not far off are networks consisting of vehicles, lane markers, exit ramps, and other highway structures that work together to create safer highways.Inter- and Intra-Vehicle Communications provides details on the current state-of-the-art in wireless communication technology within and between vehicles. The author describes the operation of vehicle systems and sensors and provides a tutorial covering the fundamental concepts associated with communications and transmission technologies that can be used for inter- and intra vehicle operations. He explains the inexpensive local interconnect network (LIN) and the more costly controller area network (CAN) and how LIN-CAN networks can be integrated.The book includes detailed information on wired and wireless communications within a vehicle and how such communications provide the capability for vehicle communications and the intelligent roadway. It also examines protocols used to transfer data, and analyzes the role of sensors used inside and outside a vehicle as a mechanism for developing smart automobiles. The author examines the issues from every angle, elucidating problems surrounding security, radio frequency interference, and operation under severe conditions and offers actual and potential solutions. These features provide an in-depth exploration of the possibilities and how to bring them into reality.

Understanding Broadband over Power Line explores all aspects of the emerging technology that enables electric utilities to provide support for high-speed data communications via their power infrastructure. This book examines the two methods used to connect consumers and businesses to the Internet through the utility infrastructure: the existing electrical wiring of a home or office; and a wireless local area network (WLAN) access point.Written in a practical style that can be understood by network engineers and non-technologists alike, this volume offers tutorials on electric utility infrastructure and home wiring, to ensure that all readers have a common base of knowledge. It reviews power line operations, analyzing how electricity is generated and delivered to consumers, and how the wiring inside buildings forms individual circuits. An appreciation for how technologies work allows for an understanding of how broadband over power line has the potential to provide ubiquitous communications that offer home users, network managers, and LAN administrators with another solution to meet their high-speed networking requirements.

Wireless mesh networking is a new technology that has the potential to revolutionize how we access the Internet and communicate with co-workers and friends. Wireless Mesh Networks examines the concept and explores its advantages over existing technologies. This book explores existing and future applications, and examines how some of the networking protocols operate.The text offers a detailed analysis of the significant problems affecting wireless mesh networking, including network scale issues, security, and radio frequency interference, and suggests actual and potential solutions for each problem.Although the book's primary focus is the potential use of wireless mesh networks in the commercial marketplace, it enables readers to gain an appreciation for use of the technology in the office, at government agencies, on campus, and in the home.

This book provides network managers, LAN administrators and small business operators with all they need to know to "interconnect" multiple locations or travelling employees that need to access a single location. The operation and utilization of virtual private networks is discussed both in theory and practicality, covering the technical aspects associated with encryption and digital certificates as well as the manner by which readers can create VPNs using readily available products from Microsoft, Cisco, Checkpoint and possibly other vendors. The author was among the first to write about the concept of virtual private networking in a series of articles published over five years ago, and in the intervening years this has become a very hot topic - with the technology being increasing deployed by companies. Virtual Private Networking, by Gilbert Held, covers the technology and the theory, but also shows readers, through numerous examples, ''how to use '' the technology.

Quality of Service is expected to become the most important communications topic in the new millennium. The acclaimed author, Gilbert Held, provides a comprehensive guide to obtaining a Quality of Service (QoS) capability in a Cisco hardware environment. Today there are many aspects of the QoS 'puzzle' and Cisco is providing users with a wide range of solutions. Some solutions are well known but do not scale for use on the Internet or on a large corporate Intranet. Other solutions must be used in conjunction with different schemes for true end-to-end QoS. That is where this book comes in, providing a guide to the various pieces of the QoS puzzle. Quality of Service in a Cisco Networking Environment:* Is a one-stop location to obtain complete and concise information about achieving QoS for applications transported over local and wireless area networks. * Provides a tutorial on the operation of different QoS techniques (IEEE 802.1p, 802.1Q, Differentiated Services, and RSVP). * Describes Cisco Router QoS and Switch QoS commands. * Gives examples of QoS configurations. * Includes a series of easy to implement IP and Frame Relay traffic enhancement techniques.Written for the local and wide area network planners and managers, local area network administrators and router administrators, every chapter initially guides the reader through the theory behind a specific QoS technique. This information is then followed with a series of Cisco command examples tailored to a specific QoS technique. Readers learn both how a QoS technique operates and how to place it into effect in a Cisco environment.

Ethernet Networks, Fourth Edition, provides everything you need to know to plan, implement, manage and upgrade Ethernet networks.* Improve your skills in employing Ethernet hubs, switches, and routers.* Learn how to set up and operate a wireless Local Area Network (LAN).* Discover how to extend a wired Ethernet via wireless LANs.* Understand cabling standards and the role of NEXT (Near End Crosstalk), FEXT (Far End Crosstalk) and other transmission parameters.* Profit from Gilbert Held's tips and tricks on enhancing security... and much more. This indispensable resource features up-to-date coverage of:* Wireless Ethernet (IEEE802.11 standards)* 10Gbps Ethernet* Firewalls in both a wired and wireless environment* The operation of new versions of Windows(r) on Ethernet LANs* The use of LAN switches at and above layer 2 in the ISO reference model* Copper and fiber optic cable to transport high speed Ethernet Network planners, administrators, and system engineers working with Ethernet networks will find Ethernet Networks, Fourth Edition, an invaluable tool for implementing, updating, and managing their networks.

Wireless LANs will enable small teams and communities to communicate via their mobile devices without cables. This new technology will facilitate communication in small businesses/teams such as in hospitals, on construction sites, warehouses, etc. Held provides a comprehensive guide to the implementation, planning and monitoring of all aspects of wireless LAN security in small offices/small to medium business (SMBs). Securing Wireless LANs is timely in addressing the security issues of this important new technology and equips its readers with the tools they need to make the appropriate choice for their own situation. This ideal introduction to wireless LAN technology:* Provides a broad overview of all the different issues and practical guidance of how to make wireless LANs secure at home as well as in small offices* Explains how to monitor wireless LANs, configure different types of wireless equipment* Discusses which technologies are best for different situations and requirements* Gives practical hints and advice on how to implement them

This book provides network managers, LAN administrators and small business operators with all they need to know to "interconnect" multiple locations or travelling employees that need to access a single location. The operation and utilization of virtual private networks is discussed both in theory and practicality, covering the technical aspects associated with encryption and digital certificates as well as the manner by which readers can create VPNs using readily available products from Microsoft, Cisco, Checkpoint and possibly other vendors. The author was among the first to write about the concept of virtual private networking in a series of articles published over five years ago, and in the intervening years this has become a very hot topic - with the technology being increasing deployed by companies. Virtual Private Networking, by Gilbert Held, covers the technology and the theory, but also shows readers, through numerous examples, 'how to use ' the technology.

Ethernet Networks, Fourth Edition, provides everything you need to know to plan, implement, manage and upgrade Ethernet networks. * Improve your skills in employing Ethernet hubs, switches, and routers. * Learn how to set up and operate a wireless Local Area Network (LAN). * Discover how to extend a wired Ethernet via wireless LANs. * Understand cabling standards and the role of NEXT (Near End Crosstalk), FEXT (Far End Crosstalk) and other transmission parameters. * Profit from Gilbert Held''s tips and tricks on enhancing security ... and much more. This indispensable resource features up-to-date coverage of: * Wireless Ethernet (IEEE802.11 standards) * 10Gbps Ethernet * Firewalls in both a wired and wireless environment * The operation of new versions of Windows(r) on Ethernet LANs * The use of LAN switches at and above layer 2 in the ISO reference model * Copper and fiber optic cable to transport high speed Ethernet Network planners, administrators, and system engineers working with Ethernet networks will find Ethernet Networks, Fourth Edition, an invaluable tool for implementing, updating, and managing their networks.

Wireless LANs will enable small teams and communities to communicate via their mobile devices without cables. This new technology will facilitate communication in small businesses/teams such as in hospitals, on construction sites, warehouses, etc. Held provides a comprehensive guide to the implementation, planning and monitoring of all aspects of wireless LAN security in small offices/small to medium business (SMBs). Securing Wireless LANs is timely in addressing the security issues of this important new technology and equips its readers with the tools they need to make the appropriate choice for their own situation. This ideal introduction to wireless LAN technology: * Provides a broad overview of all the different issues and practical guidance of how to make wireless LANs secure at home as well as in small offices * Explains how to monitor wireless LANs, configure different types of wireless equipment * Discusses which technologies are best for different situations and requirements * Gives practical hints and advice on how to implement them

Find out about TCP/IP-based network attack methods and threats to Windows NT/2000 computers and the preventive measures you can use to protect your infrastructure. Bulletproofing TCP/IP-based Windows NT/2000 Networks details the use of router access lists, firewalls, virus scanners and encryption. It includes examples of the configuration of hardware and software to prevent or minimize the effect of a wide range of communications-based attacks against TCP/IP networks and Windows NT/2000 hosts connected to such networks. - Covers how TCP/IP operates and how TCP/IP attacks occur.- Detailed coverage on how to secure both TCP/IP networks and the Windows NT/2000- host on such networks against different attack methods.- Describes a new attack method, 'script-form attack', which could cause a company financial problems, and its prevention.- Uses practical real-world examples of methods used to block potential attacks. Aimed at TCP/IP network managers, LAN admiistrators, Windows NT/2000 administrators and network professionals. It can also be used for high level undergraduate and graduate electrical engineering and computer science courses covering network security.

Now in its third edition, Understanding Data Comunications, provides a comprehensive introduction to the field of data communications for both students and professionals. Assuming no prior knowledge of the field, it presents an overview of the role of communications, their importance, and the fundamental concepts of using the ISO's 7-layer approach to present the various aspects of networking.* Covers the evolving high speed network access via digital subscriber line, cable modems and wireless communication.* Examines the role of regulatory and standardization bodies, the operation of the Internet and the use of a variety of electronic applications.* Includes a series of comprehensive questions covering the important concepts from each section.* Describes the digital network used by communications carriers and the methods used to obtain access to the digital highway.* Discusses frequency division multiplexing which forms the foundation for the operation of several types of high speed digital subscriber line.Aimed at the senior level undergraduate and graduate computer science student, it is also essential reading for data processing professionals and those involved in computer science and data communications.

The rapid increase in Internet connections has caused a dramatic rise in the technological and administrative difficulties experienced by LAN and WAN users and managers as they try to meet the demand for intercompatibility between diverse systems. This practical book addresses these challenges by covering the latest technological advancements, including high speed LANs FDDI, Fast Ethernet and ATM, token ring, TCP/IP, and more.

Data Communications Networking Devices Operation, Utilization and LAN and VAN Internetworking Fourth Edition Gilbert Held 4-Degree Consulting, Macon, Georgia, USA Data communications continue to grow enormously as a key part of telecommunications. Technological advances mean up-to-date information is essential. This fourth edition of the popular and authoritative text Data Communications Networking Devices examines the characteristics, operation and applications of the devices used to construct a data communications network. It enables readers to operate and utilize the networking devices used in the design, modification or optimization of a data communications network. Features include:* Extensive coverage of the fundamental concepts of data communications* New sections on ATM/broadband networking, LAN/WAN switches and new examples of network integration devices* Examination of the specialized devices such as security devices, LZW compression and voice digitizers* Discusses the different types of networks, network architecture and the flow of data between several networks* Questions at the end of each chapter to assist understanding.More than a comprehensive reference book, Data Communications Networking Devices is ideal as a self study guide too. It is essential reading for network managers and telecommunications engineers, data processing managers and information system managers. Visit Our Web Page! http://www.wiley.com/

This new edition of the most comprehensive reference to the terms, definitions and abbreviations associated with data and computer communications contains almost 18,000 entries (approximately 50% more than the previous edition). Covering communications definitions, terms and abbreviations, this reference has become known as an indispensable "Communications Bible." New and expanded areas include Internet and Intranet terminology, ATM, LAN, and the latest developments in communications technology. Approximately 1,000 trade names are also included allowing readers to easily identify devices and facilities.

This new edition of the most comprehensive reference to the terms, definitions and abbreviations associated with data and computer communications contains almost 18,000 entries (approximately 50% more than the previous edition). Covering communications definitions, terms and abbreviations, this reference has become known as an indispensable "Communications Bible." New and expanded areas include Internet and Intranet terminology, ATM, LAN, and the latest developments in communications technology. Approximately 1,000 trade names are also included allowing readers to easily identify devices and facilities.

Our world is rapidly becoming an Internet-based world, with tens of millions of homes, millions of businesses, and within a short period of time, possibly hundreds of millions of mobile professionals accessing the literal mother of all networks. One of the key problems affecting many Internet users, ranging from individual professionals to networking managers and administrators, is a lack of knowledge concerning Internet Protocol (IP) addressing.A detailed reference guide, The ABCs of IP Addressing provides you with the detailed information about the key challenges of IP addressing and designing networks that work efficiently. It takes you from the basics of the binary numbering system to advanced topics in subnetting, network address translation, and configuring workstations, servers and routers. The book contains network tools that prepare you for testing and troubleshooting and highlights the need for techniques that conserve the use of IP addressing as well as the creation of a next generation IP addressing structure. While structured on a chapter by chapter basis, wherever possible each chapter was written to be independent, making the book convenient and easy to use in a hectic work environment.While you may find it possible to design a network or configure a workstation to operate without a detailed knowledge of IP addressing, the end results are not very efficient. And in the quickly changing global business environment, inefficiency wastes your time and money, both valuable resources for gaining and maintaining the competitive edge. With The ABCs of IP Addressing you get the comprehensive coverage of applications and protocols that help you do your job faster and more effectively.

Understanding Broadband over Power Line explores all aspects of the emerging technology that enables electric utilities to provide support for high-speed data communications via their power infrastructure. This book examines the two methods used to connect consumers and businesses to the Internet through the utility infrastructure: the existing electrical wiring of a home or office; and a wireless local area network (WLAN) access point.Written in a practical style that can be understood by network engineers and non-technologists alike, this volume offers tutorials on electric utility infrastructure and home wiring, to ensure that all readers have a common base of knowledge. It reviews power line operations, analyzing how electricity is generated and delivered to consumers, and how the wiring inside buildings forms individual circuits. An appreciation for how technologies work allows for an understanding of how broadband over power line has the potential to provide ubiquitous communications that offer home users, network managers, and LAN administrators with another solution to meet their high-speed networking requirements.

Wireless mesh networking is a new technology that has the potential to revolutionize how we access the Internet and communicate with co-workers and friends. Wireless Mesh Networks examines the concept and explores its advantages over existing technologies. This book explores existing and future applications, and examines how some of the networking

Understanding Broadband over Power Line explores all aspects of the emerging technology that enables electric utilities to provide support for high-speed data communications via their power infrastructure. This book examines the two methods used to connect consumers and businesses to the Internet through the utility infrastructure: the existing ele

Detailing powerful methods for reducing the energy costs associated with operating a data center, Making Your Data Center Energy Efficient examines both equipment and building facilities. It reviews the rationale for conserving energy and demonstrates how conservation and careful equipment selection can lead to significant improvements to your bottom line. For those not well-versed in financial or energy terms, the first two chapters provide a detailed discussion of the terms associated with different types of energy, as well as how to compute the return on investment for energy conservation efforts. The text includes tables of monthly expenses associated with operating equipment that will help you convert problems into simple table lookup processes. Among the money-saving topics discussed, it considers: How to minimize the energy consumption of a wide range of devices A little-understood topic that can make a big impact on energy costs-general heating and cooling Techniques required to effectively monitor different types of meters Phantom energy usage and methods for minimizing its cost to your organization Recognizing that most readers may not have direct control over the selection of a furnace or hot water heater, the book provides you with the ability to recognize the efficiencies and inefficiencies of various types of devices, so you can provide input into the decision-making process. From replacing lighting to consolidation and virtualization, it provides you with the well-rounded understanding needed to properly manage all aspects of the energy consumed in your data center.