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论文作者:www.51lunwen.org论文属性:本科毕业论文 Thesis登出时间:2014-08-24编辑:felicia点击率:18115
论文字数:6361论文编号:org201408190858459958语种:英语 English地区:中国价格:免费论文
关键词:无线网络信息技术wireless networkscomputing servicesAd-hoc networks
摘要:本文是一篇信息技术留学论文。随着当前技术的不断进步,无线网络越来越普及。这些网站让用户可以“自由旅行”,从一个地方到另一个地方的过程中可以享受不中断的计算机网络服务。本文以自组网为例,分析无线网络运营的作用和影响。
Many corporations make substantial investments in their wire- less infrastructure. For example, Microsoft's IEEE 802.11 based Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy or else, to republish, to position on servers or to redistribute to lists, requires prior specific permission and/or a fee. Wireless (Wi-Fi) network consists of approximately 5,000 access points (APs) supporting 25,000 users each day in 277 buildings, covering more than 17 million square feet [10]. In addition to the equipment costs, the costs of planning, deploying, and maintaining such networks is substantial. Thus, it is important to develop infrastructure that improves the ability of Information Technology (IT) departments to manage and secure their wireless networks.
In recent years, researchers have uncovered security vulnerability- ties in Wi-Fi networks [20]. They showed that the Wired Equiv- agency Protocol (WEP), the popular 802.11 security mechanism that most corporations were using at the time, was fundamentally flawed. In a series of highly publicized papers, they showed that 802.11 networks could be compromised easily. The community reacted quickly by developing and deploying alternate security so- lotions including VPNs, IEEE 802.1x [30], several variations of EAP [14], Smart cards, and more recently WPA [29].
Yet, the wire- less LAN (WLAN) security problem was not completely resolved. Last year, Microsoft conducted a series of interviews with WLAN administrators of several large and small organizations [10]. The goal of these interviews was to understand the difficulties involved in deploying and managing corporate WLANs. The issue of WLAN security came up repeatedly during these interviews. All administrators felt that WLAN security was a problem. They were unhappy with the quality of the tools they had at their disposal. Many of them would periodically walk around their buildings using WLAN scanning software looking for security vulnerabilities. Some hired expensive outside consultants to conduct security vulnerability analyses of their WLAN deployment, only to conclude that what they really needed was an on-going monitoring and alerting system. Most administrators believed that better systems to manage WLAN security are needed.
Even after protocols such as IEEE 802.1x and WPA are deployed, corporate networks can be compromised by off-the-shelf 802.11 hardware and software. For example, an unauthorized AP can be connected to the corporate本论文由英语论文网提供整理,提供论文代写,英语论文代写,代写论文,代写英语论文,代写留学生论文,代写英文论文,留学生论文代写相关核心关键词搜索。