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局域网监听软件的设计与开发 摘 要 网络监听软件是提供给网络安全管理人员进行安全管理的工具，可以用来监视网络的状态、数据流动情况以及网络上传输的信息，以获取有用信息。作为黑客来说，通过网络监听可以获取其所需信息（比如密码等）；对黑客活动和其他网络犯罪进行侦察、取证时，可以使用网络监听技术来获取必要的信息。因此，在目前研究和使用网络监听技术及相关工具，对于防护网络安全、打击网络犯罪具有重要的现实意义。 本局域网监听软件主要利用Winpcap和Jpcap等工具进行开发，使用Java语言在Eclipse3.2环境下进行开发。软件主要实现了对网络上的数据进行监听，并分析出每一协议层的传输数据和协议层上主要字段的数据，然后将其显示出来，同时进行动态更新；另外，添加了一些附加功能（指定对象监听、饼状图显示、界面选择等）。经过测试与分析，说明了该软件运行稳定、可靠，具有一定的实际应用价值。 关键词：局域网；网络监听；协议层；数据传输；对象监听 Design and Developmentof LAN Monitoring Software Abstract Network-monitoring software is a securemanagement tool providing for the network security administrator. It can obtainuseful information which monitors the network status, data flowing andinformation of network transmitting. Hackers can get the necessary information(such as password and so on) by means of network -monitoring. Hacker may gainthe information which its needs (for instance password and so on) through thenetwork-monitoring; Carrying on taking the reconnaissance and collecting the evidencesabout the hacker activity and other network crime, we may use the networkmonitor technology to gain the essential information. Therefore, studying and usingnetwork-monitoring technology and the correlate tool in present, it is importantand practical significance for protecting network security and attackingnetwork crime. This local area network-monitoring software mainly isdeveloped by using of Winpcap, Jpcap, the Java language and so on in theEclipse 3.2 environment. This software mainly realizes monitoring the networkdata, analyzes the transmission data and the main field data on each protocollayer, and then demonstrates it, carries on the dynamic renewal. Simultaneously,this software increases some attachment functions (such as assigning objectmonitor, demonstrating of cake shape, the choice of surface etc.). After testingand the analyzing, which shows that this software is stable, reliable, and havingthe certain practical application value. Keywords: LAN; Network Monitoring; Protocol Layer; Data Transmission;Object Monitoring
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