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

• AAA (authentication, authorization and accounting)

• the operation of new versions of Windows 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.

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.

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.

Surface Science is understood as a relatively young scientific discipline, concerned with the physical and chemical properties of phenomena on clean and covered solid surfaces, studied under a variety of conditions. The adsorption of atoms and molecules on solid surfaces is, for example, such a condition, connected with more or less drastic changes of all surface properties. An adsorption event is frequently observed in nature and found to be of technical importance in many industrial processes. For this reason, Surface Science is interdisciplinary by its very nature, and as such an important intermediary between fundamental and applied research.

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.

In this thoroughly revised and updated edition of Internetworking LANs and WANs, Gilbert Held offers guidance through this challenging area of communications technology. Internetworking often causes technological and administrative problems and this book will enable the reader to avoid the many pitfalls to achieve successful connection. This new edition covers hundreds of methods to interconnect local and geographically separated LANs. New topics examined include Fast Ethernet, Windows NT systems, Data Link Switching and the use of virtual LANs and virtual networking. Features include:

• numerous screen images showing examples of how equipment is configured and how equipment operates to interconnect LANs
• review of key networking concepts, covering the technological characteristics of LANs and WANs, standards organizations and the OSI reference model
• examination of the operation and utilization of different types of networks
• detailed coverage of routers and bridge routing methods
• guidance on gateway functions, methods and applications
• mathematical models to allow the reader to evaluate network performance

Written by an expert in the field of telecommunications, this text is essential reading for all practising telecommunications engineers and undergraduate students on communications courses. Those technical network practitioners and computer science students who require a comprehensive guide to internetworking will also find this book valuable.

Whether you are a network manager tasked with providing local wireless access to corporate business systems, or a home-based user, keen to optimize your data communications network, security will be the issue uppermost in your mind.

Wireless LANs are becoming ubiquitous. From hotel lobbies to Starbucks coffee shops, from airports to offices, you can hardly avoid wireless LAN signals. Similarly widespread is the recognition that they are not secure.

Create a communications network with the appropriate level of security for your needs!

In Securing Wireless LANs Gil Held examines how wireless LANs operate, with special attention focused on the IEEE 802.11 standards. He clearly outlines the vulnerabilities in the standard and its extensions before going on to propose techniques and products you can use to overcome these limitations.

Find out …

• how to optimise the embedded security features of the IEEE 802.11 standards and extensions.
• how you can enhance the security of over-the-air transmission.
• which products, technologies and techniques you can ‘bolt on’ to your wireless LAN to provide the level of security you need

For the busy reader:

• an overview of methods and techniques that can be employed to improve on ‘off-the-shelf’ IEEE 802.11 security
• a checklist of relevant security technologies and the products they are implemented in

Screen shots illustrating tools and techniques and plentiful examples make this an accessible and thorough introduction to Wireless LAN security.

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.

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

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.