Download or read book Performance analysis of ieee 802 11b networks by means of security mechanisms written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Enquanto o uso das WLAN cresce em ritmo acelerado, inúmerosproblemas relacionados à tecnologia de segurança, definida no IEEE 802.11b, têmsido abordados em publicações técnicas, apontando deficiências evulnerabilidades, através dos quais indivíduos não autorizados podem ter acessoàs informações disponibilizadas pela rede. A precariedade na autenticação, confidencialidade e integridade dos dados dos mecanismos internos do PadrãoIEEE 802.11b exige a operação conjunta com o Padrão IEEE 802.1x. Estacombinação possibilita a autenticação e criptografia dos dados de forma maiseficiente e confiável. No entanto, é possível que haja sobrecarga de pacotes, devido à inserção de tráfego extra para autenticação dos usuários e criptografiadas mensagens, podendo ocasionar comprometimento na performance da rede. Desta forma, avaliou-se qual a efetiva degradação no desempenho das redes IEEE802.11b, devido à implementação dos mecanismos de segurança, sejam elesintrínsecos ao Padrão ou combinados com o Padrão IEEE 802.1x, utilizando osprotocolos FTP (File Transfer Protocol) e HTTP (Hipertext Transfer Protocol).

Download or read book Performance Analysis of IEEE 802 11A Signals Under Different Operational Environments written by Roy Chan Hsiung Wei and published by . This book was released on 2004-09 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the rapid employment of wireless networks commercially, the military is seeking viable solutions for providing high-speed wireless network throughout the battle space. The IEEE 802.11a wireless LAN presents an attractive solution providing up to 54 Mbps data-link bandwidth. Moreover, it operates in the less congested 5-GHz U-NII band and possesses more operating channels. This research implemented two prototype systems using low-cost commercially available hardware. The Cisco Aironet 1400 wireless bridge and the Proxim Tsunami MP.11a wireless system were chosen for their superior specifications and for their reputation of being market leaders in IEEE 802.11 wireless products. The performances of the prototype systems were evaluated in three operational environments (land, water and vegetation). The data collected were then compared to the theoretical performance.

Download or read book Wireless Operational Security written by John Rittinghouse PhD CISM and published by Elsevier. This book was released on 2004-05-01 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive wireless network book addresses the operational and day-to-day security management requirements of 21st century companies. Wireless networks can easily be reconfigured, are very mobile, allow for potentially nonstop exposure, and require the level of security be scrutinized even more than for wired networks. This includes inherent security flaws in various wireless architectures that result in additional risks to otherwise secure converged wired networks. An even worse scenario is one where an insecure wireless network is connected to a weakly secured or insecure wired network and the wireless subnet is not separated from the wired subnet. There are approximately a dozen popular books that cover components of the architecture, design, theory, issues, challenges, and recommended policies for wireless security, none of which address them in a practical, operationally-oriented and comprehensive way. Wireless Operational Security bridges this gap. *Presents a new "WISDOM" model for Wireless Security Infrastructures *Acts as a critical guide to implementing "Converged Networks" wired/wireless with all necessary security considerations *Rittinghouse's Cybersecurity Operations Handbook is the only security book recommended by the FCC

Download or read book Handbook of Wireless Local Area Networks written by Mohammad Ilyas and published by CRC Press. This book was released on 2005-05-25 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Wireless Local Area Networks: Applications, Technology, Security, and Standards captures the current state of wireless LANs, and serves as the single comprehensive reference on the subject. Addressing challenges related to the further development of WLAN technology, the Handbook covers the entire spectrum of topics from basic concepts t

Download or read book 802 11 Wireless Networks The Definitive Guide written by Matthew S. Gast and published by "O'Reilly Media, Inc.". This book was released on 2005-04-25 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: As we all know by now, wireless networks offer many advantages over fixed (or wired) networks. Foremost on that list is mobility, since going wireless frees you from the tether of an Ethernet cable at a desk. But that's just the tip of the cable-free iceberg. Wireless networks are also more flexible, faster and easier for you to use, and more affordable to deploy and maintain.The de facto standard for wireless networking is the 802.11 protocol, which includes Wi-Fi (the wireless standard known as 802.11b) and its faster cousin, 802.11g. With easy-to-install 802.11 network hardware available everywhere you turn, the choice seems simple, and many people dive into wireless computing with less thought and planning than they'd give to a wired network. But it's wise to be familiar with both the capabilities and risks associated with the 802.11 protocols. And 802.11 Wireless Networks: The Definitive Guide, 2nd Edition is the perfect place to start.This updated edition covers everything you'll ever need to know about wireless technology. Designed with the system administrator or serious home user in mind, it's a no-nonsense guide for setting up 802.11 on Windows and Linux. Among the wide range of topics covered are discussions on: deployment considerations network monitoring and performance tuning wireless security issues how to use and select access points network monitoring essentials wireless card configuration security issues unique to wireless networks With wireless technology, the advantages to its users are indeed plentiful. Companies no longer have to deal with the hassle and expense of wiring buildings, and households with several computers can avoid fights over who's online. And now, with 802.11 Wireless Networks: The Definitive Guide, 2nd Edition, you can integrate wireless technology into your current infrastructure with the utmost confidence.

Download or read book IEEE 802 11 MAC Protocol Performance Evaluation in Operational Environments written by Kacha Jitpanya and published by . This book was released on 2002-03-01 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: The IEEE 802.11 MAC protocol is widely used for wireless local area networks. Consequently, it is important to examine the protocol performance in operational environments. This thesis presents a simulation study of the performance of the IEEE 802.11 MAC protocol in multihop, jamming, and mobile node environments. The effects of the request-to-send mechanism and fragmentation in these environments are also studied. The average throughput and delay are obtained from the simulation and these results are then used to analyze the protocol performance.

Download or read book Intrusion Detection for IP Based Multimedia Communications over Wireless Networks written by Jin Tang and published by Springer Science & Business Media. This book was released on 2013-09-27 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: IP-based multimedia communications have become increasingly popular in recent years. With the increasing coverage of the IEEE 802:11TM based wireless networks, IP-based multimedia communications over wireless networks are also drawing extensive attention in both academia and industry. Due to the openness and distributed nature of the protocols involved, such as the session initiation protocol (SIP) and the IEEE 802:11TM standard, it becomes easy for malicious users in the network to achieve their own gain or disrupt the service by deviating from the normal protocol behaviors. This SpringerBrief presents real-time intrusion detection techniques that can quickly track the malicious behaviors which manipulate the vulnerabilities from either the 802.11TM or the SIP protocols. More specifically, this book presents interdisciplinary techniques to achieve an effective real-time intrusion detection system, which interweaves medium access control (MAC) protocol analysis, cumulative sum (CUSUM) based detector design, a novel Markovian model for CUSUM detectors, sketch-based traffic modeling, and wavelet based signal processing techniques.

Download or read book Handbook of Research on Wireless Security written by Yan Zhang and published by IGI Global. This book was released on 2008-01-01 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book combines research from esteemed experts on security issues in various wireless communications, recent advances in wireless security, the wireless security model, and future directions in wireless security. As an innovative reference source forstudents, educators, faculty members, researchers, engineers in the field of wireless security, it will make an invaluable addition to any library collection"--Provided by publisher.

Download or read book Computer Architecture and Security written by Shuangbao Paul Wang and published by John Wiley & Sons. This book was released on 2013-01-10 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book to introduce computer architecture for security and provide the tools to implement secure computer systems This book provides the fundamentals of computer architecture for security. It covers a wide range of computer hardware, system software and data concepts from a security perspective. It is essential for computer science and security professionals to understand both hardware and software security solutions to survive in the workplace. Examination of memory, CPU architecture and system implementation Discussion of computer buses and a dual-port bus interface Examples cover a board spectrum of hardware and software systems Design and implementation of a patent-pending secure computer system Includes the latest patent-pending technologies in architecture security Placement of computers in a security fulfilled network environment Co-authored by the inventor of the modern Computed Tomography (CT) scanner Provides website for lecture notes, security tools and latest updates

Download or read book Detection of Intrusions at Layer One written by Jason William Erbskorn and published by . This book was released on 2009 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Defending IEEE 802 11 Based Networks Against Denial of Service Attacks written by Boon H. Tan and published by . This book was released on 2003-12-01 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: The convenience of IEEE 8O2.11-based wireless access networks has led to widespread deployment in the consumer, industrial and military sectors However, this use is predicated on an implicit assumption of confidentiality and availability In addition to widely publicized security flaws in IEEE 8O2.11's basic confidentially mechanisms, the threats to network availability presents any equal, if not greater danger to users of IEEE 8O2.11-based networks It has been successfully demonstrated that IEEE 8O2.11 is highly susceptible to malicious denial-of-service (DoS) attacks targeting its management and media access protocols Computer simulation models have proven to be effective tools in the study of cause and effect in numerous fields This thesis involved the design and implementation of a IEEE 8O2.11-based simulation model using OMNeT++, to investigate the effects of different types of DoS attacks on a IEEE 8O2.11 network, and the effectiveness of corresponding countermeasures.

Download or read book The Cable and Telecommunications Professionals Reference written by Goff Hill and published by CRC Press. This book was released on 2012-07-26 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is for any telecommunications-convergence professional who needs to understand the structure of the industry, the structure of telephony networks and services, and the equipment involved.With the growing variety of networks and technologies now on offer it is inevitable that some convergence will take place between different networks, services and products. New VOIP (voice over internet protocol) networks must interwork with traditional networks. For instance, mobile phones can offer data services; wireless broadband connections to laptops will allow VOIP phone calls away from base; users could have the option of 'convergent phones' that can be used on a landline when at home or business, but which can be used as a mobile when on the move, and so on.

Download or read book Computer Performance Engineering written by Dieter Fiems and published by Springer. This book was released on 2016-09-15 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 13th European Workshop on Computer Performance Engineering, EPEW 2016, held in Chios, Greece, in October 2016. The 14 papers presented together with 2 invited talks in this volume were carefully reviewed and selected from 25 submissions. The papers presented at the workshop reflect the diversity of modern performance engineering, with topics ranging from the analysis of queueing networks and stochastic processes, to performance analysis of computer systems and networks, and even modeling of human behavior.

Download or read book Designing and Deploying 802 11 Wireless Networks written by Jim Geier and published by Cisco Press. This book was released on 2015-04-29 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designing and Deploying 802.11 Wireless Networks Second Edition A Practical Guide to Implementing 802.11n and 802.11ac Wireless Networks For Enterprise-Based Applications Plan, deploy, and operate high-performance 802.11ac and 802.11n wireless networks The new 802.11ac standard enables WLANs to deliver significantly higher performance. Network equipment manufacturers have refocused on 802.11ac- and 802.11n-compliant solutions, rapidly moving older versions of 802.11 toward “legacy” status. Now, there’s a complete guide to planning, designing, installing, testing, and supporting 802.11ac and 802.11n wireless networks in any environment, for virtually any application. Jim Geier offers practical methods, tips, and recommendations that draw on his decades of experience deploying wireless solutions and shaping wireless standards. He carefully introduces 802.11ac’s fundamentally different design, site survey, implementation, and network configuration techniques, helping you maximize performance and avoid pitfalls. Geier organizes each phase of WLAN deployment into clearly defined steps, making the entire planning and deployment process easy to understand and execute. He illuminates key concepts and methods through realistic case studies based on current Cisco products, while offering tips and techniques you can use with any vendor’s equipment. To build your skills with key tasks, you’ll find several hands-on exercises relying on free or inexpensive tools. Whether you’re deploying an entirely new wireless network or migrating from older equipment, this guide contains all the expert knowledge you’ll need to succeed. Jim Geier has 30 years of experience planning, designing, analyzing and implementing communications, wireless, and mobile systems. Geier is founder and Principal Consultant of Wireless-Nets, Ltd., providing wireless analysis and design services to product manufacturers. He is also president, CEO, and co-founder of Health Grade Networks, providing wireless network solutions to hospitals, airports, and manufacturing facilities. His books include the first edition of Designing and Deploying 802.11n Wireless Networks (Cisco Press); as well as Implementing 802.1X Security Solutions and Wireless Networking Handbook. Geier has been active in the IEEE 802.11 Working Group and Wi-Fi Alliance; has chaired the IEEE Computer Society (Dayton Section) and various conferences; and served as expert witness in patent litigation related to wireless and cellular technologies. Review key 802.11 concepts, applications, markets, and technologies Compare ad hoc, mesh, and infrastructure WLANs and their components Consider the impact of radio signal interference, security vulnerabilities, multipath propagation, roaming, and battery limitations Thoroughly understand today’s 802.11 standards in the context of actual network deployment and support Plan your deployment: scoping, staffing, schedules, budgets, risks, feasibility analysis, and requirements Architect access networks and distribut

Download or read book Improvements and Performance Analysis of IEEE 80211 Medium Access Protocols written by Ozgur Ekici and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In IEEE 802.11 standard development process, new physical and medium access layer techniques for higher throughput (IEEE 802.11n) and quality of service (IEEE 802.11e) enhancements are being designed on solid foundation of the distributed coordination function. None of these recently developed enhancements are immune to hidden node and hot-spot (congestion) problems. On the contrary, the increased operational bandwith of the higher throughput implementation makes them more prone to interference in limited number of IEEE 802.11 channels. Distributed coordination function is and will be the primary contention resolution algorithm of IEEE 802.11 systems. Identification and formulation of the common problems this channel access technique is facing in practical networks would give us a better understanding in terms of its limitations. In this work, we introduce a methodology to estimate the throughput performance of distributed coordination in unsaturated and hidden communication environments. Then by applying this methodology, we analytically estimate the abnormality in its fairness performance. The secondary channel access scheme of IEEE 802.11 is point coordination function, which does not suffer from hidden node and collision problems. We show that point coordination function in its current form has a poor throughput performance due to ignoring of the multi-rate transmission capability of users. We propose a new indexing algorithm for polling that increases the performance of point coordination function significantly. In this thesis, we extend the performance analysis of the distributed coordination function to enterprise networks configurations where networks are typically comprised of multiple access points. We propose an intelligent association algorithm that provides consistent higher throughput and better network-wide fairness independent of user load distribution within the network in comparison to the standard association algorithm.

Download or read book Intelligent Mechanisms for Network Configuration and Security written by Steven Latré and published by Springer. This book was released on 2015-06-08 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 9th IFIP WG 6.6 International Conference on Intelligent Mechanisms for Network Configuration and Security, AIMS 2015, held in Ghent, Belgium, in June 2015. The 7 full papers presented in this book were carefully reviewed and selected from 22 submissions. The volume also includes 9 papers presented at the AIMS Ph.D. workshop. They were reviewed and selected from 24 submissions. The full papers are organized in topical sections on autonomic and decentralized management and security, privacy, and measurements. The workshop papers are organized in topical sections on management of future networking and security management.

Download or read book Intelligent Interactive Assistance and Mobile Multimedia Computing written by Djamshid Tavangarian and published by Springer. This book was released on 2009-11-06 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: TheIMC2009programconsistedofthreeinvitedtalksfrominternational- perts, four tutorials on fundamental techniques related to the conference topics, nine regular paper sessions, and a short paper / poster session. We received close to 50 submissions from 15 countries world-wide. Based on the ano- mous reviews provided by members of the international Program Committee, the Steering Committee recommended accepting 50% of the contributions as regular papers and another 15% as short papers with poster presentation. To our regret there were a few interesting papers that we had to reject. However, the reviewing results showed a high quality as well as an interesting variety of submissions. We would like to thank all authors for carefully preparing the results of their worksubmitted to IMC 2009,thus enabling an interesting and high-quality c- ferenceprogram. Moreover, wearedeeplygratefultoallmembersoftheProgram and Steering Committees for their e?orts in quickly and thoroughly evaluating the papers. Finally, our special thanks go to the organizers Ulrike Lucke and Daniel Versick for their great work. They handled all the organizationaltasks as well as the communications, the electronic submission, reviewing, and publi- tion procedure in an e?cient and timely manner.