RADIUS, or Remote Authentication Dial-In User Service, is a widely deployed protocol that enables companies to authenticate, authorize and account for remote users who want access to a system or service from a central network server. RADIUS provides a complete, detailed guide to the underpinnings of the RADIUS protocol. Author Jonathan Hassell brings practical suggestions and advice for implementing RADIUS and provides instructions for using an open-source variation called FreeRADIUS.

PC Repair and Maintenance: A Practical Guide is a reader-friendly guide to repairing computers (running either Microsoft Windows 95, 98, Me, 2000, or XP) through easy-to-understand language, detailed diagrams, and video tutorials. The book emphasizes that a deep understanding of "how a computer works" is not necessary to diagnose and repair problems; it concentrates on practical, "hands-on" solutions that can be implemented right away. Focusing mainly on installing and troubleshooting hardware, the book also provides solutions to common operating system-related problems. In addition, thorough explanations for selecting re-placement and expansion components without paying top dollar are providedhelping users get the most out of their newly repaired PC. Regardless of your level of experience, this is the perfect resource for anyone who wants to repair a computer or is considering a career in the computer repair business.

Macworld's team of experts have used their knowledge of Apple's revolutionary products to create a straightforward guide to getting started with Apple's groundbreaking new communications and entertainment device, the iPhone. This book covers all you need to know about the iPhone, for Mac and Windows users alike.

This 90-page book gives you in-depth information about using your iPhone, including power tips and tricks about its revolutionary Internet features, its complete built-in iPod functionality, and more. You'll learn the optimal strategies for converting your DVDs into movies playable on the iPhone, as well as Smart Playlist techniques to make the most use of the iPhone's limited storage capacity. There's also vital troubleshooting advice and a tour of the best in iPhone accessories. Let Macworld's team of Apple experts show you how to get the most out of your iPhone.

This book will teach the reader how to make the most of their WRT54G series hardware. These handy little inexpensive devices can be configured for a near endless amount of networking tasks. The reader will learn about the WRT54Gs hardware components, the different third-party firmware available and the differences between them, choosing the firmware that is right for you, and how to install different third-party firmware distributions. Never before has this hardware been documented in this amount of detail, which includes a wide-array of photographs and complete listing of all WRT54G models currently available, including the WRTSL54GS.
Once this foundation is laid, the reader will learn how to implement functionality on the WRT54G for fun projects, penetration testing, various network tasks, wireless spectrum analysis, and more! This title features never before seen hacks using the WRT54G. For those who want to make the most out of their WRT54G you can learn how to port code and develop your own software for the OpenWRT operating system.

*Never before seen and documented hacks, including wireless spectrum analysis
*Most comprehensive source for documentation on how to take advantage of advanced features on the inexpensive wrt54g platform
*Full coverage on embedded device development using the WRT54G and OpenWRT

The era of seemingly unlimited growth in processor performance is over: single chip architectures can no longer overcome the performance limitations imposed by the power they consume and the heat they generate. Today, Intel and other semiconductor firms are abandoning the single fast processor model in favor of multi-core microprocessors–chips that combine two or more processors in a single package. In the fourth edition of Computer Architecture, the authors focus on this historic shift, increasing their coverage of multiprocessors and exploring the most effective ways of achieving parallelism as the key to unlocking the power of multiple processor architectures. Additionally, the new edition has expanded and updated coverage of design topics beyond processor performance, including power, reliability, availability, and dependability.

Most computer users think that fiddling with the insides of their PC is taboo. They fear that by removing the screws that hold the case on, they're crossing into forbidden territory. And even for those who know they can open the box and fix or upgrade their PC, analysis paralysis often stops them in their tracks:

Which upgrades offer the best bang for the buck? How do you pinpoint the faulty component that's making your system freeze? What about compatibility issues?

 The Winn L. Rosch Hardware Bible provides a background on how things work, puts competing technologies, standards, and products in perspective, and serves as a reference that provides quick answers for common computer and technology questions. It functions as a buying guide, telling not only what to buy, but why. It also lays the foundation for upgrading or repairing a computer, but stops short of the step-by-step mechanics of the process. The chief purpose of the Hardware Bible remains educational. Some new features in this edition include rewritable DVD technology as well as Blu-ray Discs, wireless networking including 802.11a and 802.11b, Bluetooth wireless communications, and extended coverage of digital cameras, scanners, and telecommunications…and much more!

One way is by reading the book you hold in your hand. It's designed to help you understand all the technologies that underlie the modern personal computer and all its peripherals that help make it useful. Although you won't be able to design a computer when you're finished (that is, unless you already knew how to when you started), you will know what it takes to design one, how computers work, and how you can work better with them—and get them to do more for you. It doesn't matter if you regard a screwdriver as a tool, an instrument of torture, or a new curiosity you've never before encountered. Even if you have no technical background whatsoever, this book will guide you to a level of understanding that will let you buy, use, and upgrade your computer with confidence. At the same time, you'll find all the technical information that you need to do a school report or business presentation on nearly any current computer topic.

Virtualization with Xen is the first book to demonstrate to readers how to install, administer, and maintain a virtual infrastructure based on XenSources latest release, Xen 3.2. It discusses best practices for setting up a Xen environment correctly the first time, maximizing the utilization of server assets while taking advantage of the fastest and most secure enterprise-grade paravirtualization architecture. It covers both basic and advanced topics, such as planning and installation, physical-to-virtual migrations, virtual machine provisioning, resource management, and monitoring and troubleshooting guests and Xen hosts.

Here is your essential companion to the best-selling Wii game console. The Nintendo Wii Pocket Guide steers you through how to

 -Set up your Wii and connect it to your network.
 -Make your way around the Wii Channels.
 -Pick and use Wii controllers,including the Wii Remote, Nunchuk, and Classic and GameCube controllers.
 -Create and edit your own Mii—using Wii software or third-party tools—and take charge of other Miis.
 -Go beyond games and use the Wii to browse the Internet, send and receive email, set parental controls, and create memos and calendars.
 -Shop the Wii Shop Channel and buy and spend Wii Points to purchase Virtual Console games.
 -Choose the best Wii games and play older Nintendo games on the Wii.
 -Find handy accessories.
 -Tinker with your Wii to get the most out of the game console.

The real reason that scanners have enjoyed such a surge in popularity is that more computer owners now recognize just how useful a scanner can be. More applications that ever make use of your scanner, and the Internet makes it easy to share the documents and images you scan through e-mail or your Web site. Many computer owners are even turning to their scanners for handicrafts, such as creating custom printed items!

I wrote this book especially for scanner owners who want to find out all about what that marvelous piece of machinery can do. You can start from the basics and work your way to the tips, tricks and technology used by scanner experts.