【摘要】 网络嗅探器(sniffer)无论是在网络安全还是在黑客攻击方面均扮演了很重要的角色。通过使用网络嗅探器可以把网卡设置于混杂模式,并可实现对网络上传输的数据包的捕获与分析。在网络安全方面,网络嗅探手段可以有效地探测在网络上传输的数据包信息,通过对这些信息的分析利用是有助于网络安全维护的。但如为黑客所利用也可以为其发动进一步的攻击提供有价值的信息。可见,嗅探器实际是一把双刃剑。本文将对网络嗅探器的原理进行分析并探讨了一些防止被sniffer的方法。更多还原

【Abstract】 Network sniffer plays an important role either in network safety or in hacker’s attack. Network sniffer being used, network card can be installed in an interwoven mode, and the data bundle transimitted on net can be seized and analysed. In network safety, network sniffing method can inspect effectively the information of data bundle transimitted on net. Analysing and using this information helps to maintain network safety. But if it is utilized by hackers, it can also provide valuable information for further attack. Thus, sniffer is virtually a sword with two blades. This paper analyses the principles of network sniffer and explores some methods to be not sniffer out.更多还原