Capture mechanism on network data packages is the basic analysis tools of network capability and network security systems.

数据包截获机制是网络性能分析工具和网络安全工具的实现基础。

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String matching is a classic research area in computer science and plays an important role in different kinds of network security systems.

串匹配是计算机研究领域的一个经典问题，是众多网络安全系统中的关键技术之一。

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But some network security systems cannot combine these technologies, cannot give attention to efficiency of system, and scarce of fine-granularity inner security management.

但现有的一些网络安全系统未能将上述技术有机地加以结合，不能很好地兼顾系统执行效率，对系统内部缺乏细粒度的安全管理。

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Instead of talking about cars, these geeks were showing off their aptitude in technology, talking about things like cloud computing, network security and advanced communications systems.

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Systems administrators, network security specialists and help-desk technicians are still in demand, says Mr. Zion.

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"But a great deal of it concerns our most sensitive systems, including aircraft avionics, surveillance technologies, satellite communications systems, and network security protocols, " he said.

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