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关键词： ABP   欺骗   防御  

摘要： 目前利用TCP/IP协议安全漏洞进行欺骗攻击的事件经常发生,攻击者通过对主机的ARP欺骗,使其网络在正常连接的情况下出现无法打开网页、频繁断网、IE浏览器出错等问题,极大影响用户使用计算机网络。通过ARP协议原理分析揭示ARP协议欺骗,并给出相应的防御方法。

关键词： ARP   中间人攻击   拒绝服务攻击   VLAN  

摘要： 该文首先对ARP协议进行了简单的介绍,然后分析了ARP协议所存在的安全问题及由此产生的两种攻击形式,最后提出了防范ARP攻击的一些具体方法。

关键词： ARP协议   ARP攻击   MAC地址邦定  

摘要： 介绍ARP协议工作原理,ARP协议弱点如何被攻击者利用进行各种攻击,常见ARP攻击方法及现象分析,并提出各种防范ARP攻击方法。

关键词： COMPUTERS   Networking   General  

ISBN: (数字)9781133477259 ISBN: (纸本)9781423903161

摘要： Designed for the beginner yet useful for the expert, COMPUTER NETWORKING FROM LANS TO WANS: HARDWARE, SOFTWARE, AND SECURITY covers all aspects of computer networking. Hardware details such as the operation of Ethernet, network media and devices, including hubs, switches, routers, and physical topology, are provided, with many design and troubleshooting examples. Software details such as the operation of the TCP/IP protocols, routing protocols, and network operating systems are examined. Applications, such as FTP, Telnet, and email are explained in detail, as are the requirements of writing client/server applications, with several working examples provided. Techniques for applying security to networking and computing activities are covered, including network management, secure communication methods such as SSH, TLS, and VPN, and the fundamentals of forensics. A strong pedagogical approach introduces each new topic with practical, real-world examples, and step-by-step Hands-On Projects. A companion CD includes videos and numerous files that allow students to perform important hands-on networking, security, and forensic activities.

关键词： ARP病毒   ARP协议   MAC地址  

摘要： 文章通过分析ARP攻击的理论基础和常见攻击方式,探讨了局域网防范ARP病毒攻击的措施,提出了有助于防治的思路。

关键词： ARP协议   ARP攻击  

摘要： 在局域网中,通过ARP协议来完成IP地址转换为第二层物理地址(即MAC地址)。ARP协议对网络安全具有重要的意义。通过伪造IP地址和MAC地址实现ARP欺骗,能够在网络中产生大量的ARP通信量使网络阻塞。

关键词： ARP   ARP欺骗   防范  

摘要： 近年来,ARP欺骗攻击已经成为危害网络正常稳定运行的主要问题.本文从ARP协议的角度,介绍ARP欺骗的原理及其防治办法.

关键词： QoS   组播路由   蚁群算法   遗传模拟退火   备选路径集编码  

摘要： 进入21世纪以来,计算机网络技术得到了飞速发展,各种宽带网络应用层出不穷。IPTV、视频会议、远程教学、网络游戏、数据资料分发等宽带应用都对现有网络的承载能力提出了挑战,这就使得组播通信方式成为网络支持多媒体业务的必要形式。与此同时,这些分布式的多媒体应用对带宽、时延、时延抖动以及丢包率有不同的要求,这需要当前网络能够传送具有这些QoS要求的实时多媒体信息。因此,基于多约束QoS的组播路由算法的研究成为计算机网络研究领域的重要内容和热点问题。 本文主要研究基于多约束QoS的组播路由算法,针对带宽、延迟、抖动和丢包率等约束的最小代价组播路由问题,提出了一种高效、实用的组播路由算法。主要研究工作和取得的成果如下: (1)在介绍组播路由技术相关背景知识的基础上,研究了QoS路由的基本概念和网络模型,归纳分析了当今主要的相关算法以及各自优缺点;(2)提出了一种将蚁群算法和遗传模拟退火算法相结合的混合优化算法(ACOGSA,Ant Colony Optimization and Genetic Simulated annealingAlgorithm),采用基于蚁群算法创建的备选路径集编码方式,大大提高了编码效率;在组播路由算法设计中将遗传算法与模拟退火方法相结合,克服了遗传算法“过早收敛”问题和模拟退火算法优化时间性能较差的缺点,并引入变异退火算子和含浓度均衡措施的选择复制算子,使得算法性能进一步增强;(3)改进了salama网络拓扑生成器,对提出的算法进行仿真,并与传统算法就收敛性和运行时间上进行比较,仿真结果表明算法的可行性、有效性和稳定性,并验证了算法具有代价低、收敛迅速的特点。

关键词： biocontrol rhizobacteria   commensalism   fungal-bacterial interactions   patatin-like phospolipase   shotgun DNA microarray  

摘要： In soil, some antagonistic rhizobacteria contribute to reduce root diseases caused by phytopathogenic fungi. Direct modes of action of these bacteria have been largely explored;however, commensal interaction also takes place between these microorganisms and little is known about the influence of filamentous fungi on bacteria. An in vitro confrontation bioassay between the pathogenic fungus Gaeumannomyces graminis var. tritici (Ggt) and the biocontrol bacterial strain Pseudomonas fluorescens Pf29Arp was set up to analyse bacterial transcriptional changes induced by the fungal mycelium at three time-points of the interaction before cell contact and up until contact. For this, a Pf29Arp shotgun DNA microarray was constructed. Specifity of Ggt effect was assessed in comparison with one of two other filamentous fungi, Laccaria bicolor and Magnaporthe grisea. During a commensal interaction, Ggt increased the growth rate of Pf29Arp. Before contact, Ggt induced bacterial genes involved in mycelium colonization. At contact, genes encoding protein of stress response and a patatin-like protein were up-regulated. Among all the bacterial genes identified, xseB was specifically up-regulated at contact by Ggt but down-regulated by the other fungi. Data showed that the bacterium sensed the presence of the fungus early, but the main gene alteration occurred during bacterial-fungal cell contact. New Phytologist (2009) 181: 435-447doi: 10.1111/j.1469-8137.2008.02675.x.

关键词： ARP攻击   校园网安全   防御解决方案  

摘要： 随着校园网规模的不断扩大,ARP攻击问题在校园网管理中越来越突出。本文介绍了ARP攻击的原理,以及由此引发的网络安全问题,并针对校园网中不同的实际应用情况,提出不同的ARP攻击防御解决方案,以解决校园网中因ARP攻击而引发的网络安全问题。