This book was written for the thousands of IT professionals-from CIOs to circuit-switched telecom engineers-who are now responsible for deploying and maintaining secure VoIP networks. The book explains the impact on your VoIP network of PSTN, SIP, H.323, firewalls, NAT, encryption, and the regulatory environment. Coverage includes evaluation, design, integration, and management of VoIP networking components, including IP telephones, gateways, gatekeepers, registration servers, media servers, and proxy servers. Throughout the book, the authors rely on their extensive real-world experience to provide readers with practical applications and solutions.
* VoIP Isn’t Just Another Data Protocol
IP telephony uses the Internet architecture, similar to any other data application. However, from a security administrator’s point of view, VoIP is different. Understand why.
* What Functionality Is Gained, Degraded, or Enhanced on a VoIP Network?
Find out the issues associated with quality of service, emergency 911 service, and the major benefits of VoIP.
* The Security Considerations of Voice Messaging
Learn about the types of security attacks you need to protect against within your voice messaging system.
* VoIP and the Public Switched Telephone Network (PSTN)
Understand PSTN: what is it, and how does it work?
* VoIP Communication Architectures
See how products like Skype, H.248, IAX, and Microsoft Live Communications Server 2005
* The Support Protocols of VoIP Environments
Learn the services, features, and security implications of DNS, TFTP, HTTP, SNMP, DHCP, RSVP, SDP, and SKINNY.
* Securing the Whole VoIP Infrastructure
Your guide to Denial-of-Service attacks, VoIP service disruption, call hijacking and interception, H.323-specific attacks, and SIP-specific attacks.
* Authorized Access Begins with Authentication
Learn the methods of verifying both the user identity and the device identity in order to secure a VoIP network.
* Secure Internet Mail
See how S/MIME provides cryptographic security services for electronic messaging applications.
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This book provides a detailed coverage of the e-hardware verification language (HVL), state of the art in verification methodologies, and the use of eHVL as a facilitating verification tool in implementing a state of the art verification environment. To this end, the book provides a comprehensive description of the new concepts introduced by the e-language, e-language syntax, and its associated semantics. In addition, the book describes architectural views and requirements of verification environments (i.e. randomly generated environments, coverage driven verification environments, etc.). Verification blocks in the architectural views (i.e. Generators, Initiators, Collectors, Checkers, Monitors, Coverage Definitions, etc.) and their implementations using the eHVL are also discussed in detail in separate parts of the book. The book describes the eReuse Methodology (RM), the motivation for defining such a guideline and step-by-step instructions for building an eRM compliant eVerification Component (eVC). A complete implementation of a UART eRM compliant eVC is used as the working example for putting all topics in perspective.
The computer game industry is clearly growing in the direction of multiplayer, online games. Understanding the demands of games on IP (Internet Protocol) networks is essential for ISP (Internet Service Provider) engineers to develop appropriate IP services. Correspondingly, knowledge of the underlying network’s capabilities is vital for game developers.
Installing and operating a Wi-Fi hotspot allows you to attract customers and differentiate your business. Deploying even a small wireless network has proven to be a difficult task for the average consumer, however. With this book as your guide, you can painlessly figure out the requirements for your Wi-Fi hotspot, how to properly set it up, how to operate it, and how to optimize it for the needs and security of your customers.
Pro Scalable .NET 2.0 Application Designs explains how to plan and implement .NET 2.0 applications. It addresses platform, hosting, and database requirements, as well as architectural design techniques that can be used to create the application itself. For example, the book illustrates a comparison between two models, the “traditional” and the “new” SOA, to weigh the advantages and disadvantages of each. This book also makes use of the newest version of Web Services Enhancements (WSE 3.0), ensuring you have access to the latest Microsoft standards and advice.
This new, leading-edge book offers you a comprehensive, in-depth presentation of GPRS (general packet radio service). The book helps you understand how this system is used as a major building block technology for the emerging mobile Internet. You explore the most critical aspects of GPRS in great detail, and gain a real-world understanding of the inevitable implementation challenges you will face in the field. After a general overview of the GSM and GPRS systems, the book provides you with detailed coverage of a wide range of important topics, including the radio interface, Gb interface, BSSGP, signaling plane, user plane, and RLC (radio link control) principles. Case studies throughout present simple approaches to implementation problems that arise during the development process, along with proposed resolutions. This unique resource is an essential reference for engineers working in the field, and also serves well as a text for advanced graduate and post-graduate students in related courses.
Information Modeling for Internet Applications considers the fundamentals of web site modeling. It gives theoretical background as well as practical modeling techniques, which assist in the planning and development of web sites, other collections of hyperdocument and web-based information systems in general. Besides the modeling of page structures, navigation paths, and presentation functions, this will help to perform a variety of additional tasks, such as adaptation to user groups.
Lots of books have to do with computer and network security, which is to say they explain how to protect your files and other resources from malicious characters. Privacy Defended has more to do with protecting Internet users from themselves. The team of authors makes it clear that Internet entities (mainly commercial interests, though miscellaneous troublemakers fall into this category as well) have tremendous interest in finding out as many details as possible about you. This book goes into considerable depth on the technologies (such as browser cookies) and social engineering techniques (such as contests whose entry forms solicit your e-mail address) that have evolved to circumvent the inherently anonymous nature of the Internet.Internet users willing to sit down and have a serious look at what this book has to say will be rewarded with a solid understanding of the implications of nearly everything they do online. Readers are, for instance, clued in to the undercover behavior of Netscape SmartDownload (early versions of the software reported your identity and the files you downloaded to a central server) and made to wonder about what other free utilities might be doing. Once they’ve instilled a bit of paranoia in their readers, the authors offer advice on securing typical home computers (and networks of them) against attack. They compare and contrast commercial products for this purpose, and go into helpful detail on the characteristic risks of cable modems and other broadband links
Most discussion about Web design seems to focus on the creative process, yet turning concept into reality requires a strong set of deliverablesâ€â€the documentation (concept model, site maps, usability reports, and more) that serves as the primary communication tool between designers and customers. Here at last is a guide devoted to just that topic. Combining quick tips for improving deliverables with in-depth discussions of presentation and risk mitigation techniques, author Dan Brown shows you how to make the documentation you’re required to provide into the most efficient communications tool possible. He begins with an introductory section about deliverables and their place in the overall process, and then delves into to the different types of deliverables. From usability reports to project plans, content maps, flow charts, wireframes, site maps, and more, each chapter includes a contents checklist, presentation strategy, maintenance strategy, a description of the development process and the deliverable’s impact on the project, and more.
The wireless community is on the verge of the standardization of fourth generation (4G) systems. Research has generated a number of solutions for significant improvement of system performance. The development of enabling technologies such as adaptive coding and modulation, iterative (turbo) decoding algorithms and space-time coding, means that industry can now implement these solutions. Advanced Wireless Communications: 4G Technologies focuses on the system elements that provide adaptability and reconfigurability and discusses how these features can improve 4G system performance.There are several different systems comprising 4G, including adaptive WCDMA (Wideband Code Division Multiple Access), ATDMA (Adaptive Time Division Multiple Access), Multicarrier (OFDMA) and Ultra Wide Band (UWB) receiver elements. This book provides a comparative study of these technologies and focuses on their future co-existence.
