1网络安全定义网络安全是指网络系统的硬件、软件及其系统中的数据受到保护,不因偶然的或者恶意的原因而遭受到破坏、更改、泄露,系统连续可靠正常地运行,网络服务不中断。网络安全从其本质上来讲就是网络上的信息安全。从广义来说,凡是涉及到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网络安全的研究领域。网络安全是一门涉及计算机科学、网络技术、通信 1 definition of network security Network security refers to the network system hardware, software and data in the system is protected from accidental or malicious reasons for being damaged, altered, leaked, the system operates continuously and reliably, network services Interrupted. Network security by its very nature is the information security on the network. Broadly speaking, all relevant technologies and theories concerning the confidentiality, integrity, availability, authenticity and controllability of information on the Internet are all the research fields of network security. Network security is a computer science, network technology, communications