If you want to deploy your own wireless network, at home or at the office, you must first understand the capabilities and risks associated with the 802.11 protocols. The updated '802.11 Wireless Networks: The Definitive Guide', second edition, covers everything readers need to know about integrating wireless technology into current infrastructure.

This new edition offers a case for building wireless networks on a local level - they are inexpensive and can be implemented and managed by the community using them. This guide helps readers plan a network, obtain essential components and understand protocols.

From passive network scanning to aligning long-distance antennas, beefing up wireless network security, and beyond, this book answers real-life networking needs with direct solutions. It includes coverage for important changes in specifications, hardware and software, and delve into cellular and Bluetooth technologies.

'PHP 5 For Dummies', written in the 'For Dummies' easy-to-understand style, shows Web site builders and programmers how to use the popular PHP Open Source scripting language.

From selecting the right keywords to crafting the right message, this book explains how to boost site traffic using AdWords, Google's hugely successful sponsor-link advertising programme.

Covering everything from basic security principles and practices to the latest security threats and responses, including proven methods for diagnosing network vulnerabilities and insider secrets for boosting security effectiveness, this guide should help build competence in the field of information systems security.