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网络安全是一个综合的立体的概念。提出了一个通用的网络安全防御系统模型 ,并对该模型中的防火墙和入侵检测的相关技术及热点研究作了较详细的叙述
Network security is an integrated three-dimensional concept. A general network security defense system model is proposed, and the firewall and intrusion detection technology and hot research in this model are described in more detail