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从狭义的维护角度来看,计算机网络安满是指计算机及其网络系统资源和信息资源不受天然和人为有害要素的威胁和损害,从广义来说,凡是涉及到计算机网络上信息的保密性、完整性、可用性、真实性和可控性的相关技术和理论都是计算机网络安全的研究领域。

(From a narrow maintenance point of view, computer network security means that computers and their network system resources and information resources are not threatened and damaged by natural and man-made harmful elements. The related technologies and theories of , integrity, availability, authenticity, and controllability are all areas of research in computer network security.)

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