网络安全培训（Network security training）.doc

网络安全培训（Network security training） Looking to foreign window into the river. Support the opinions with sufficient grounds, It stands to reason. A court where the spring months, phantom flowers and a single figure. The setting sun is infinitely good, just near dusk. Defy the clouds and hide your eyes, only at the highest level. This article is contributed by ggyy5230 Ppt documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. Network security training Catalog 1234 Several significant threats to the security of the computer security and network security to protect the security of computers and network security systems and air defense system Computer network security and purpose Computer network security: refers to the computer and its network system, resources and information resources from natural and man-made threats and hazards of harmful factors. Objective: to protect the computer network system, hardware, software and system data, so that it is not damaged, due to accidental or malicious reasons change and leakage, the system can ensure the reliable normal operation, the network service is not interrupted. Five elements of network security include confidentiality: ensuring that information is not exposed to unauthorized entities or processes. Integrity: only the person allowed to modify the data and can determine whether the data has been tampered with. Availability: authorized entities can access data when needed, that is, attackers cant take all of their resources and hinder the work of an authorized person. Service is not interrupted. Controllability: it can control the flow of information and behavior within the scope of authority. Censorship: the basis and means for investigating emerging network security issues. Layered protection system for network security Computer insecurity Computer information systems are not safe, and their insecurity factors include computer in